# Photoelectric Sensor, PNP Open Collector, 30 mm, 50 mA, 12 V to 24 V

![Product image](https://novapart.co/image/farnell:3413997/)

**URL**: https://novapart.co/products/E3T-SL23%202M/photoelectric-sensor-pnp-open-collector-30-mm-50
**SKU**: E3T-SL23 2M
**Manufacturer**: OMRON INDUSTRIAL AUTOMATION
**Price**: €139.2900
**Stock**: 10+
**Lead Time**: 50 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| Product Range | E3T Series |
| Sensing Range Max | 30mm |
| Sensor Output Type | PNP Open Collector |
| Supply Voltage Dc Max | 24V |
| Supply Voltage Dc Min | 12V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3413997/)

## Miniature Square Photoelectric Sensor in plastic housing **E3T** 

- Precision pinpoint LED 

- 3.5 mm thin flat shape or 6.6 mm side view shape where space is crucial 

- IP67 

- Pulse synchronisation for high ambient light immunity 

- Models for mounting with M2 or M3 screws 

## **Features** ~~Co~~ 

3.5 mm flat model with background supression (BGS) with highest repeatability even for differently coloured objects. 

Minimal black/white error 

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(mm)<br>25<br>20<br>15<br>10<br>5<br>0<br>White paper Black paper<br>E3T-FL1@<br>**----- End of picture text -----**<br>


Unique light receiving lens shape New mounting technology for reliable background for high precision alignment suppression in 3.5 mm flat housing 

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Light receiving lens<br>**----- End of picture text -----**<br>


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Light receiving<br>Flip chip (IC) element<br>Rear Front Side<br>**----- End of picture text -----**<br>


Object detection through small holes 

- The precision pinpoint LED of the through-beam models provides appropriate sensing distances for very precise and reliable detection even through smallest slits and gaps with e.g. 0.5 mm dia. 

- The coaxial optics and the small focal lens of the retro-reflective models allow the detection of small (dia 2 mm) objects or through small holes (dia 2 mm). 

**E3T** 

1 

## ~~CO~~ **Application** 

## E3T-SL limited-reflective models (side view) 

- Minimum detection object: 0.15 mm dia. 

- Limited-reflective optics reduce the influence of changing backgrounds and surrounding metal for enhanced detection stability. 

E3T-FD Diffuse-reflective Models (Flat) 

- Minimum detection object: 0.15 mm dia. 

- 3.5 mm thickness for installations with limited space. 

Models with M2 or M3 mounting holes 

- space saving M2 screw mounting (screws included) 

- standard M3 screw mounting 

(order screws sets from accessories) 

Miniature Photoelectric Sensors 

2 

## Ordering Information 

## Sensors 

|ensor type|Sensing<br>distance|Connection method|Connection method|Connection method|Connection method|Operation<br>mode|Mounting<br>screw<br>size|Order code*1|Order code*1|
|---|---|---|---|---|---|---|---|---|---|
|||||||||NPN output|PNP output|
|hrough-<br>eam|2 m|–|–|2 m|For ordering pigtail versions replace '2M' of cable types with:<br>- M1J: M12 with 30 cm cable, - M3J: M8 4-pin with 30 cm cable<br>- M5J: M8 3-pin with 30 cm cable|Light-ON|M2|E3T-ST31 2M|E3T-ST33 2M|
|||||||Dark-ON|M2|E3T-ST32 2M|E3T-ST34 2M|
||1 m|||||Light-ON|M2|E3T-ST11 2M|E3T-ST13 2M|
||||||||M3|E3T-ST11M 2M|E3T-ST13M 2M|
|||||||Dark-ON|M2|E3T-ST12 2M|E3T-ST14 2M|
||||||||M3|E3T-ST12M 2M|E3T-ST14M 2M|
||300 mm|||||Light-ON|M2|E3T-ST21 2M|E3T-ST23 2M|
||||||||M3|E3T-ST21M 2M|E3T-ST23M 2M|
|||||||Dark-ON|M2|E3T-ST22 2M|E3T-ST24 2M|
||||||||M3|E3T-ST22M 2M|E3T-ST24M 2M|
|hrough-<br>eam|500 mm|||||Light-ON|M2|E3T-FT11 2M|E3T-FT13 2M|
|||||||Dark-ON|M2|E3T-FT12 2M|E3T-FT14 2M|
||300 mm|||||Light-ON<br>|M2<br>|E3T-FT21 2M<br>|E3T-FT23 2M<br>|
|||||||Dark-ON|M2|E3T-FT22 2M|E3T-FT24 2M|
|etro-<br>eflective|30 to 200 mm*2<br>on reflectors/<br>10 to 100 mm*2<br>on reflective<br>foils|||||Light-ON|M2|E3T-SR41-C 2M*3<br>|E3T-SR43-C 2M*3<br>|
|||||||Dark-ON|M2|E3T-SR42-C 2M*3|E3T-SR44-C 2M*3|
|iffuse-<br>eflective|5 to 30 mm|||||Light-ON|M2|E3T-FD11 2M|E3T-FD13 2M|
||||||||M3|E3T-FD11M 2M|E3T-FD13M 2M|
|||||||Dark-ON|M2|E3T-FD12 2M|E3T-FD14 2M|
||||||||M3|E3T-FD12M 2M|E3T-FD14M 2M|
|imited-<br>eflective|5 to 15 mm|||||Light-ON|M2|E3T-SL11 2M|E3T-SL13 2M|
||||||||M3|E3T-SL11M 2M|E3T-SL13M 2M|
|||||||Dark-ON|M2|E3T-SL12 2M|E3T-SL14 2M|
||||||||M3|E3T-SL12M 2M|E3T-SL14M 2M|
||5 to 30 mm|||||Light-ON|M2|E3T-SL21 2M|E3T-SL23 2M|
||||||||M3|E3T-SL21M 2M|E3T-SL23M 2M|
|||||||Dark-ON|M2|E3T-SL22 2M|E3T-SL24 2M|
||||||||M3|E3T-SL22M 2M|E3T-SL24M 2M|
|iffuse-<br>eflective<br>back-<br>round<br>uppresion)|1 to 15 mm|||||Light-ON|M2|E3T-FL11 2M|E3T-FL13 2M|
|||||||Dark-ON|M2|E3T-FL12 2M|E3T-FL14 2M|
||1 to 30 mm|||||Light-ON|M2|E3T-FL21 2M|E3T-FL23 2M|
|||||||Dark-ON|M2|E3T-FL22 2M|E3T-FL24 2M|



*1. For pre-wired models with robotic cables add '-R' to the order code (example: E3T-FT21R 2M) 

*2. The distances are measured with reflector E39-R4 and reflective foil E39-R37-CA. For applications with shorter distances between the sensor and the reflector contact your OMRON representative. 

*3. Order reflector separately. Models with included reflectors are available. 

**E3T** 

3 

Accessories (Order Separately) Slits 

|Minimum detectable object (typical)|Sensing distance|Applicable sensor|Quantity|Order code|
|---|---|---|---|---|
|0.5mm dia|200 mm|E3T-ST3|2|E39-S63|
||100 mm|E3T-ST1|||
||30 mm|E3T-ST2|||
|1mm dia|600 mm|E3T-ST3|||
||300 mm|E3T-ST1|||
||100 mm|E3T-ST2|||
|0.5mm dia|50 mm|E3T-ST1||E39-S64|
||30 mm|E3T-ST2|||
|1mm dia|100 mm|E3T-ST1|||
||50 mm|E3T-ST2|||
|0.5mm dia|100 mm|E3T-ST1_M||E39-S67A|
||30 mm|E3T-ST2_M|||
|1mm dia|300 mm|E3T-ST1_M||E39-S67B|
||100 mm|E3T-ST2_M|||



Mutual Interference Prevention Filters 

|Sensing distance<br>Applicable sensor|Sensing distance<br>Applicable sensor|||Quantity||Order code|
|---|---|---|---|---|---|---|
|300 mm|E3T-ST1_M||4 (two for receivers and two for emitters)|4 (two for receivers and two for emitters)||E39-S67B|
|100 mm|E3T-ST2_M||||||
|Reflectors|||||||
|Shape<br>Type<br>Sensing distance*1<br>Small reflector<br>200 mm (30 mm)<br>~~Se ~~||Minimum detectable<br>object(typical)<br>Remarks<br>2 mm dia<br> ~~a~~||||Order code<br>E39-R4|
||100 mm (10 mm)|||Reflectors E39-_-CA||E39-R37-CA|
|||||are optimised for opera-|||
|||||tion with E3T-SR4.|||
||Tape reflector<br>100 mm (10 mm)|||Please verify the perfor-<br>mance when using oth-||E39-RS1-CA|
||100 mm (10 mm)<br>100 mm (10 mm)<br>~~oe~~|||er reflectors and<br>reflective tapes.|E39-RS2-CA<br>E39-RS3-CA<br>~~oe~~||
|*1.<br>Values in parentheses indicate the minimum required distance between the Sensor and Reflector.||Values in parentheses indicate the minimum required distance between the Sensor and Reflector.|||||
|Sensitivity Adjustment Unit|||||||
|Appearance<br>~~a~~|Sensingdistance(typical)<br>Quantity<br>300 to 800 mm<br>1<br>~~a~~<br>~~ee~~|||Remarks<br>Model<br>Can be used with the E3T-ST1@<br>Though-beam Models.<br>E39-E10<br>~~ee~~|||



Reflectors 

*1. Values in parentheses indicate the minimum required distance between the Sensor and Reflector. 

Sensitivity Adjustment Unit 

Miniature Photoelectric Sensors 

4 

## Mounting Brackets 

|Appearance|Quantity|Remarks|Model|
|---|---|---|---|
||1|Can be used with the E3T-S@@@<br>Side-view Models.<br>(A securing nut plate is provided with the Mounting Bracket.)|E39-L116|
||||E39-L117<br>for M2 mounting|
||||E39-L166<br>for M3 mounting|
||||E39-L118|
|||Can be used with the E3T-F@@@<br>Flat Models.|E39-L119|
||||E39-L120<br>for M2 mounting|
||||E39-L167<br>for M3 mounting|
|||Spacer for mounting flat sensors with M3 screws|E39-L168|



Note: When using Through-beam models, order one bracket for the Receiver and one for the Emitter. 

## Screw Sets 

|Type|Comment|Applicable sensor|Quantity|Order code|
|---|---|---|---|---|
|Screw set for M2 side view sensors|Iron Phillips screws (M2×14),<br>Hexagonal nuts, Spring washers,<br>Flat washers|E3T-S|2|E39-L164|
|Screw set for M2 flat sensors|Iron Phillips screws (M2×8),<br>Hexagonal nuts, Spring washers,<br>Flat washers|E3T-F||E39-L165|
|SUS Screw set for M2 side view sen-<br>sors|Stainless steel bolt with hexagonal<br>hole (M2 x 6)|E3T-S||E39-L172|
|SUS Screw set for M2 flat sensors|Stainless steel bolt with hexagonal<br>hole<br>(M2×12), Hexagonal nuts, Spring<br>washers, Flat washers|E3T-F||E39-L173|
|SUS Screw set for M3 side view sen-<br>sors|Stainless steel bolt with hexagonal<br>hole (M3 x 6)|E3T-S_M||E39-L170|
|SUS Screw set for M3 flat sensors|Stainless steel bolt with hexagonal<br>hole<br>(M3×15), Hexagonal nuts, Spring<br>washers, Flat washers|E3T-F_M||E39-L171|



**E3T** 

5 

Rating and Specifications 

|Item|Item|Through-beam|Through-beam|Through-beam|Through-beam|Retro-reflective|Retro-reflective|Diffuse-reflective|Diffuse-reflective|
|---|---|---|---|---|---|---|---|---|---|
|||Side-view||Flat||Side-view||Flat||
|||NPN|PNP|NPN|PNP|NPN|PNP|NPN|PNP|
|||E3T-ST1_<br>E3T-ST2_|E3T-ST1_<br>E3T-ST2_|E3T-FT1_<br>E3T-FT2_|E3T-FT1_<br>E3T-FT2_|E3T-SR41<br>E3T-SR42|E3T-SR43<br>E3T-SR44|E3T-FD11<br>E3T-FD12|E3T-FD13<br>E3T-FD14|
|Sensing distance||E3T-ST1@<br>E3T-ST2@<br>E3T-ST3@<br>1 m<br>300 mm<br>2 m||E3T-FT1@<br>E3T-FT2@<br>500 mm<br>300 mm||200 mm (30 mm)<br>with E39-R4*1<br>100 mm (10 mm)<br>with E39-R37-CA*1||5 to 30 mm<br>(50 x 50 mm white paper)||
|Minimum detectable<br>object (typical)||2 mm dia opaque object<br>(E3T-ST1 and E3T-ST2)<br>3 mm dia opaque object<br>(E3T-ST3)||1.3 mm dia opaque object||2 mm dia. (sensing dis-<br>tance of 100 mm)||0.15 mm dia. (sensing<br>distance of 10 mm)||
|Hysteresis (white paper)||---||||||6 mm max.||
|Directional angle||Emitter:<br>2° to 20°<br>Receiver: 2° to 70°||Emitter:<br>3° to 25°<br>Receiver: 3° min.||2° to 20°||---||
|Light source<br>(wavelength)||Red LED (“Pin-point” LED)= 650 nm||||||||
|Power supply voltage||12 to 24 VDC ±10%, ripple (p-p) 10% max.||||||||
|Current consumption||Emitter:<br>10 mA max.<br>Receiver: 20 mA max.||||20 mA max.||||
|Control output||Load power supply voltage: 26.4 VDC max.<br>Load current: 50 mA max.<br>(residual voltage: 2 V max. for load current of 10 to 50 mA, 1 V max. for load current of less than 10 mA)<br>Open collector output<br>Light ON: E3T-@@@1 and E3T-@@@3<br>Dark ON: E3T-@@@2 and E3T-@@@4||||||||
|Protection circuits||Power supply and control output reverse polarity<br>protection<br>Output short-circuit protection||||Power supply and control<br>output reverse polarity<br>protection<br>Output short-circuit pro-<br>tection, Mutual interrefer-<br>ence prevention, surge<br>suppressor||Power supply and control<br>output reverse polarity<br>protection<br>Output short-circuit pro-<br>tection, Mutual interrefer-<br>ence prevention||
|Response time||Operate or reset: 1 ms max.||||||||
|Ambient illumination||Incandescent lamp: 5,000 lx max.<br>Sunlight:<br>10,000 lx max.||||||||
|Ambient temperature<br>range||Operating: -25 to 55 °C<br>Storage:<br>-40 to 70 °C (with no icing or condensation)||||||||
|Ambient humidity range||Operating: 35% to 85%<br>Storage:<br>35% to 95% (with no condensation)||||||||
|Insulation resistance||20 Mmin. at 500 VDC||||||||
|Dielectric strength||1,000 VAC, 50/60 Hz for 1 min||||||||
|Vibration resistance||Destruction: 10 to 2,000 Hz, 1.5 mm double amplitude or 300 m/s2for 0.5 hrs each in X, Y, and Z directions||||||||
|Shock resistance||Destruction: 1,000 m/s23 times each in X, Y, and Z directions||||||||
|Degree of protection||IP67 (IEC60529)||||||||
|Connection method||Pre-wired (standard length: 2 m)||||||||
|Weight||Approx. 40 g||||Approx. 20 g||||
|Materials|Case|PBT (polybutylene terephthalate)||||||||
||Display<br>window|Denatured polyarylate||||||||
||Lens|Denatured polyarylate||||Methacrylic resin||Denatured polyarylate||
|Accessories||Instruction manual, (screw set E39-L164 for E3T-ST (2 sets) and E3T-SR (1 set); screw set E39-L165 for<br>E3T-FT (2 sets) and E3T-FS (1 set). For E3T-_M order screw sets separately)||||||||



*1. Values in parentheses indicate the minimum required distance between Sensor and Reflector. 

Miniature Photoelectric Sensors 

6 

|Item|Item|Limited-reflective|Limited-reflective|Limited-reflective|Limited-reflective|Diffuse-reflective (background suppression)|Diffuse-reflective (background suppression)|Diffuse-reflective (background suppression)|Diffuse-reflective (background suppression)|
|---|---|---|---|---|---|---|---|---|---|
|||Side-view||||Flat||||
|||NPN|PNP|NPN|PNP|NPN|PNP|NPN|PNP|
|||E3T-SL11<br>E3T-SL12|E3T-SL13<br>E3T-SL14|E3T-SL21<br>E3T-SL22|E3T-SL23<br>E3T-SL24|E3T-FL11<br>E3T-FL12|E3T-FL13<br>E3T-FL14|E3T-FL21<br>E3T-FL22|E3T-FL23<br>E3T-FL24|
|Sensing distance||5 to 15 mm<br>(50 x 50 mm white paper)||5 to 30 mm<br>(50 x 50 mm white paper)||1 to 15 mm<br>(50 x 50 mm white paper)||1 to 30 mm<br>(50 x 50 mm white paper)||
|Standard sensing object||---||||||||
|Minimum detectable<br>object (typical)||0.15 mm dia. (sensing distance of 10 mm)||||0.15 mm dia non-glossy object<br>(sensing distance of 10 mm)||||
|Hysteresis (white paper)||2 mm max.||6 mm max.||0.5  mm max.||2 mm max.||
|Black/white error||---||||||15% max.||
|Directional angle||---||||||||
|Light source<br>(wavelength)||Red LED (“Pin-point” LED)= 650 nm||||||||
|Power supply voltage||12 to 24 VDC ±10%, ripple (p-p) 10% max.||||||||
|Current consumption||20 mA max.||||||||
|Control output||Load power supply voltage: 26.4 VDC max.<br>Load current: 50 mA max. (residual voltage: 2 V max. for load current of 10 to 50 mA, 1 V max. for load current<br>of less than 10 mA)<br>Open-collector output<br>Light ON: E3T-@@@1 and E3T-@@@3<br>Dark ON: E3T-@@@2 and E3T-@@@4||||||||
|Protection circuits||Power supply and control output reverse polarity protection<br>Output short-circuit protection, Mutual interference prevention||||||||
|Response time||Operate or reset: 1 ms max.||||||||
|Ambient illumination||Incandescent lamp: 5,000 lx max.<br>Sunlight:<br>10,000 lx max.||||||||
|Ambient temperature<br>range||Operating: -25 to 55 °C<br>Storage:<br>-40 to 70 °C (with no icing or condensation)||||||||
|Ambient humidity range||Operating: 35% to 85%<br>Storage:<br>35% to 95% (with no condensation)||||||||
|Insulation resistance||20 Mmin. at 500 VDC||||||||
|Dielectric strength||1,000 VAC, 50/60 Hz for 1 min||||||||
|Vibration resistance||Destruction: 10 to 2,000 Hz, 1.5 mm double amplitude or 300 m/s2for 0.5 hrs each in X, Y, and Z directions||||||||
|Shock resistance||Destruction: 1,000 m/s23 times each in X, Y, and Z directions||||||||
|Degree of protection||IP67 (IEC60529)||||||||
|Connection method||Pre-wired (standard length: 2 m)||||||||
|Weight||Approx. 20 g||||||||
|Materials|Case|PBT (polybutylene terephthalate)||||||||
||Display<br>window|Denatured polyarylate||||||||
||Lens|Denatured polyarylate||||||||
|Accessories||Instruction manual, (screw set E39-L164 for E3T-SL (1 set); screw set E39-L165 for E3T-FL (1 set). For<br>E3T-_M order screw sets separately)||||||||



**E3T** 

7 

Engineering Data (Typical) 

## M2-mounting and M3-mounting Sensors 

## Parallel Operating Range 

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Through-beam<br>E3T-ST3 @  + E39-S63 Slit  E3T-ST @@  + E39-E14 Mutual interference  E3T-ST1 @ (M) + E39-S63 Slit<br>(A Slit is mounted to the Emitter and Receiver.)  prevention filter (A Slit is mounted to the Emitter and Receiver.)<br>(A Slit is mounted to the Emitter and Receiver.)<br>200  100  200<br>Without Slit  80 Y<br>150 150<br>E3T-ST1@<br>60 Without Slit  X<br>100 0.5-dia   100<br>Slit  40 1-dia Slit<br>Y  Y  0.5-dia Slit<br>50 50<br>20<br>1.0-dia Slit  X  X<br>0 1.0 2.0 3.0 4.0 5.0 0 0.5 1.0 1.5 2.0 2.5 0 0.4 0.8 1.2 1.6 2.0<br>−50 Distance X (m)  −20 Distance X (m)  −50 Distance X (m)<br>−40<br>−100 −100<br>−60<br>−150 −80 E3T-ST3@ −150<br>−200  −100  −200<br>E3T-ST1 @ (M) + E39-S63 Slit (Enlarged graph) E3T-ST2 @ (M) + E39-S63 Slit E3T-FT1 @  + E39-S64 Slit<br>(A Slit is mounted to the Emitter and Receiver.)  (A Slit is mounted to the Emitter and Receiver.)  (A Slit is mounted to the Emitter and Receiver.)<br>80 25 200<br>Y  20 Y<br>60 Without Slit  150<br>X  15 X<br>40 1-dia Slit  Y  100<br>10<br>1-dia Slit  0.5-dia Slit  X<br>20 5 50 0.5-dia Slit<br>0.5-dia Slit<br>0 0 200  400  600  800  0 0.2 0.4 0.6 0.8 1 1.2 1.4<br>−20             40              80           120           160           200  −5 Distance X (mm)  −50 Without Slit  Distance X (m)<br>Distance X (mm)  −10<br>−40 −100<br>−15<br>−60 −20 −150 1-dia Slit<br>−80  −25 −200<br>E3T-FT1 @  + E39-S64 Slit (Enlarged graph) E3T-FT2 @  + E39-S64 Slit Retro-reflective<br>(A Slit is mounted to the Emitter and Receiver.)  (A Slit is mounted to the Emitter and Receiver.)  E3T-SR4@<br>80 80  40<br>1-dia Slit<br>60 Y  60 30 Y<br>Without Slit<br>1-dia Slit  X  X<br>40 40 20<br>0.5-dia Slit  E3T-SR4@+E39-R4<br>Y<br>20 20 10<br>0.5-dia Slit<br>X<br>0             40              80           120           160           200  0 200  400  600  800  0<br>−20 Distance X (mm)  −20 Distance X  (mm)  −10 100  200  300  400<br>−40 −40 −20 E3T-SR4@+E39-R37-CA Distance X (mm)<br>−60 −60 −30<br>−80  −80  −40<br>Operating Range<br>Diffuse-reflective Convergent-reflective<br>E3T-FD1 @ (M) E3T-SL1 @ (M) E3T-SL2 @ (M)<br>4  15  4<br>3 50 x 50 mm white paper Sensing object:   X Y  Sensing object:  50 x 50 mm white paper  X Y  3 Sensing object:  50 x 50 mm white paper  X Y<br>10<br>2 2<br>5<br>1 1<br>0 0 0 10  20  30  40<br>−1 −1<br>10  20  30  40  −5 5 10 15 20 25 30 Distance X (mm)<br>−2 Distance X  Distance X   −2<br>(mm)  −10 (mm)<br>−3 −3<br>−4  −15  −4<br>Distance Y (mm)  Distance Y (mm)  Distance Y (mm)<br>Distance Y (mm)  Distance Y (mm)  Distance Y (mm)<br>Distance Y (mm)  Distance Y (mm)  Distance Y (mm)<br>Distance Y (mm)  Distance Y (mm)  Distance Y (mm)<br>**----- End of picture text -----**<br>


Miniature Photoelectric Sensors 

8 

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Inclination Detection Area Characteristic<br>BGS-reflective Convergent-reflective<br>E3T-FL1 @ E3T-FL2 @ E3T-SL1 @ (M) (Top to Bottom)<br>20<br>5  10<br>4 8 Stainless steel<br>3 6<br>2 50 x 50 mm white paper Sensing object:   X Y  4 Sensing object:  50 x 50 mm white paper  X Y  Glass  t: 0.7 mm<br>1 2<br>10<br>0 2  4  6  8  10  12  14  16  0 5  10  15  20  25  30  35<br>−1 Distance X (mm)  −2 Distance X (mm)<br>−2 −4 +θ  −θ  Angle of  inclination<br>−3 −6<br>−4 −8<br>0<br>−5  −10  −10  0  Angle θ (10 °)<br>E3T-SL1 @ (M) (Right to Left) E3T-SL2 @ (M) (Top to Bottom) E3T-SL2 @ (M) (Right to Left)<br>20  40  40<br>Stainless steel<br>Stainless steel<br>30  30<br>Glass<br>10  20  t: 0.7 mm  20  +θ  −θ  Aninclination gle of<br>Stainless steel<br>10  10<br>Glass  Angle of<br>t: 0.7 mm  +θ  −θ  inclination  Angle of   Glass<br>+θ  −θ  inclination  t: 0.7 mm<br>0 −10  0  10  0 −10  0  10  0 −10  0  10<br>Angle θ (°) Angle θ (°)   Angle θ (°)<br>BGS-reflective<br>E3T-FL1 @  (Top to Bottom) E3T-FL1 @  (Right to Left) E3T-FL2 @  (Top to Bottom)<br>20  20  40<br>Aninclination gle of  Aninclination gle of  Aninclination gle of<br>+θ  +θ  +θ<br>White paper  Center line  −θ  White paper  Center line  −θ  30  White  paper  Center line  −θ<br>10  10  20<br>Glass<br>t: 0.7 mm<br>Glass  Glass<br>t: 0.7 mm  t: 0.7 mm  10<br>Stainless steel<br>Stainless steel<br>Stainless steel<br>0  0  0<br>−10  0  10  −10  0  10  −10  0  10<br>Angle θ (°)  Angle θ (°)  Angle θ (°)<br>Excess Gain vs. Set Distance<br>Through-beam<br>E3T-FL2 @  (Right to Left) E3T-ST1 @ (M)/E3T-ST3 @ E3T-ST2 @ (M)<br>40  100 14<br>Angle of<br>inclination  50<br>+θ  30 12<br>30  White paper  Center  −θ<br>line  E3T-ST3@ 10<br>10<br>5 8<br>20  3<br>6<br>Operating  E3T-ST1@(M)<br>level  1<br>Glass  4<br>10  t: 0.7 mm  0.5<br>0.3 2<br>Stainless steel  Operating level  1<br>0  0.1  0<br>−10  0  Angle θ (10 °)  0  1000  2000  Set distance (mm) 3000  4000  0  300  600  Set distance (mm) 900  1200<br>Distance (mm)<br>Distance Y (mm)  Distance Y (mm)<br>Distance (mm)  Distance (mm)  Distance (mm)<br>Distance (mm)  Distance (mm)  Distance (mm)<br>Distance (mm)  Excess gain ratio  Excess gain ratio<br>**----- End of picture text -----**<br>


**E3T** 

9 

**==> picture [511 x 708] intentionally omitted <==**

**----- Start of picture text -----**<br>
Retro-reflective<br>E3T-FT1 @ E3T-FT2 @ E3T-SR4@<br>100 14  100<br>50 50<br>12<br>30 30<br>10 E3T-SR4@+E39-R4<br>10 10<br>5 8 5<br>3 3<br>6<br>Operating  Operating  E3T-SR4@+E39-R37-CA<br>level  1 level  1<br>4<br>0.5 0.5<br>0.3 2 0.3<br>Operating<br>level  1<br>0  0.1<br>0.1 0  400  800  1200  1600  2000 0  500  1000  1500  2000  0  100  200  300<br>Set distance (mm)  Set distance (mm)  Set distance (mm)<br>Diffuse-reflective Convergent-reflective<br>E3T-FD1 @ (M) E3T-SL1 @ (M) E3T-SL2 @ (M)<br>100 1000 100<br>50 500 50<br>300<br>30 30<br>100<br>10 50 10<br>5 White paper  30 White paper  5 White paper<br>3 10 3<br>5<br>Operating  3 Operating<br>level  1 level  1<br>Operating<br>0.5 level  1 0.5<br>0.3 Black paper  0.5 0.3 Black paper<br>0.3<br>Black paper<br>0.1 0                  10                  20                  30                 40  0.1 0                   5                  10                  15                  20  0.1 0                   10                 20                  30                 40<br>Set distance (mm)  Set distance (mm)  Set distance (mm)<br>Sensing Object Size vs. Sensing Distance Sensing Distance vs. Material<br>Convergent-reflective Diffuse/Convergent-reflective Convergent-reflective<br>E3T-SL1 @ (M) E3T-FD1 @ (M)/E3T-SL2 @ (M) E3T-SL1 @ (M)<br>2.0 10  25<br>Sensing object: Pin-gauge, stainless steel<br>1.6   8 20<br>1.2 6 15<br>E3T-FD1@(M)<br>0.8 4 10<br>0.4 2 5<br>E3T-SL2@(M)<br>0<br>0                      5                   10                 15                  20  0  5  10  15  20  25  30<br>Set distance (mm)  Set distance (mm)<br>Material<br>Diffuse-reflective BGS-reflective<br>E3T-SL2 @ (M) E3T-FD1 @ (M) E3T-FL1 @<br>50  70  20<br>60<br>40<br>15<br>50<br>30<br>40<br>10<br>30<br>20<br>20<br>5<br>10<br>10<br>0  0  0<br>Material Material  Material<br>Excess gain ratio  Excess gain ratio  Excess gain ratio<br>Excess gain ratio  Excess gain ratio  Excess gain ratio<br>Min. sensing object dia. (mm)  Min. sensing object dia. (mm)  Sensing distance (mm)<br>White   paper  Stainless  Plywood  Cardboard  Glass   sheet  Black   rubber  Black   paper<br>Sensing distance (mm)  Sensing distance (mm)  Sensing distance (mm)<br>White   paper  Stainless  Plywood  Cardboard  Glass   sheet  Black   rubber  Black   paper  White   paper  Stainless  Plywood  Cardboard  Glass   sheet  Black   rubber  Black   paper  White   paper  Stainless  Plywood  Cardboard  Glass   sheet  Black   rubber  Black   paper<br>**----- End of picture text -----**<br>


Miniature Photoelectric Sensors 

10 

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**----- Start of picture text -----**<br>
Sensing Distance Characteristics of Sensitivity Adjustment Unit<br>(when Completing Optical Axis Adjustment)<br>E3T-FL2 @ E3T-ST1 @  + E39-E10 Sensitivity Adjustment Unit<br>E3T-ST3 @  + E39-E10 Sensitivity Adjustment Unit<br>40  3.5<br>3.0<br>30<br>2.5<br>E3T-ST3@<br>2.0<br>20<br>1.5<br>1.0<br>10<br>E3T-ST1@<br> 0.5<br>0  0   Min  1/3  1/2  2/3  Max<br>Adjustment dial angle<br>Material<br>Sensing distance (mm)  Sensing distance (m)<br>White   paper  Stainless  Plywood  Cardboard  Glass   sheet  Black   rubber  Black   paper<br>**----- End of picture text -----**<br>


## I/O Circuit Diagrams 

## NPN Output 

|Model|Operation mode|Timingcharts|Timingcharts|Timingcharts|Timingcharts|Timingcharts|Output circuit|Output circuit|Output circuit|Output circuit|
|---|---|---|---|---|---|---|---|---|---|---|
|E3T-_1<br>E3T-_1M|Light-ON|Operation<br>indicator<br>(orange)<br>Light incident<br>Light interrupted<br>ON<br>OFF<br>Output<br>transistor<br>ON<br>OFF<br>Load<br>(e.g., relay)<br>Operate<br>Reset<br>(Between brown and black)|||||4<br>3<br>1<br>50 mA<br>max.<br>0 V<br>ZD<br>12 to 24 VDC<br>Through-beam Receivers,<br>Retroreflective and Reflective Models<br>Through-beam Emitters<br>Brown<br>Black<br>(Control<br>output)<br>Blue<br>Operation<br>indicator<br>(Orange)<br>Stability<br>indicator<br>(Green)<br>Load<br>(Relay)<br>Photo-<br>electric<br>Sensor<br>Main<br>Circuit<br>Brown<br>**1**<br>**3**<br>Blue<br>12 to 24 VDC<br>Photo-<br>electric<br>Sensor<br>Main<br>Circuit||||
|E3T-_2<br>E3T-_2M|Dark-ON|ON<br>OFF<br>ON<br>OFF<br>Operate<br>Reset<br>(Between brown and black)<br>Operation<br>indicator<br>(orange)<br>Light incident<br>Light interrupted<br>Output<br>transistor<br>Load<br>(e.g., relay)|||||||||
|PNP Output|||||||||||
|Model|Operation mode|Timingcharts|||||||Output circuit||
|E3T-_3<br>E3T-_3M|Light-ON|Operation<br>indicator<br>(orange)<br>Light incident<br>Light interrupted<br>ON<br>OFF<br>Output<br>transistor<br>ON<br>OFF<br>Load<br>(e.g., relay)<br>Operate<br>Reset<br>(Between blue|||||Photo-<br>electric<br>Sensor<br>Main<br>Circuit<br>Operation<br>indicator<br>(Orange)<br>Stability<br>indicator<br>(Green)<br>Through-beam Receivers,<br>Retroreflective and Reflective Mo<br>1<br>3<br>Through-beam Emitters<br>Photo-<br>electric<br>Sensor<br>Main<br>Circuit|||4<br>1<br>3<br>50 mA<br>max.<br>0 V<br>ZD<br>12 to 24 VDC<br>Brown<br>Black<br>(Control<br>output)<br>Blue<br>Load<br>(Relay)<br>dels<br><br><br>Brown<br>Blue<br>12 to 24 VDC|
||||||||||||
||||||||||||
||||blue||||||||
|E3T-_4<br>E3T-_4M|Dark-ON|Operation<br>indicator<br>(orange)<br>Light incident<br>Light interrupted<br>ON<br>OFF<br>Output<br>transistor<br>ON<br>OFF<br>Load<br>(e.g., relay)<br>Operate<br>Reset<br>(Between b|||||||||
||||||||||||
|||||||||Photo-<br>electric<br>Sensor<br>Main<br>Circuit|||
||||||||||||
|||||||||||Blue|
||||||||||||
||||||||||||
||||||||||||
||||||||||||
||||||||||||
||||||||||||



**E3T** 

11 

Safety Precautions 

## **Refer to** _**Warranty and Limitations of Liability**_ **.** 

## **WARNING** 

**This product is not designed or rated for ensuring safety of persons. Do not use it for such purpose.** 

**Do not apply AC power to the E3T, otherwise the E3T may rupture.** 

## **Precautions for Correct Use** 

Do not use the product in atmospheres or environments that exceed product ratings. 

## Wiring 

The maximum power supply voltage is 26.4 VDC. Before turning the power ON, make sure that the power supply voltage be not more than maximum voltage. 

## **Load short-circuit protection** 

The E3T incorporates a load short-circuit protection function. If the load short-circuits, the output of the E3T will be turned OFF. Then, recheck the wiring and turn on the E3T again to reset the load shortcircuit protection function. The load short-circuit protection function will work if there is a current flow that is 1.5 times larger than the rated load current. When using a capacitance load, be sure that the inrush current will not exceed 1.5 times larger than the rated current. 

## Mounting 

When mounting the Sensor, never strike it with a heavy object, such as a hammer. Doing so may reduce its watertight properties. Use screws with spring, flat, or toothed washers to secure the Sensor. Tightening Torque M2-mounting Sensors: 0.15 N·m max M3-mounting Sensors: 0.5 N·m max 

## **Mounting the Sensor on Moving Parts** 

Consider models that use break B resistant cables (e.g., Robotics Cables) if the Sensor will be mounted on a moving part, such as a A C robot hand. The flexing resistance of Robotics Cable at approximately θ θ 400 thousand times is far superior to that of standard cable at approximately 14 thousand times. R **Cable Bending Rupture Test (Tough Cable Breaking Test)** The cable is repeatedly bent with power supplied to check the number Weight of bends until the current is turned OFF. 

||**Specimen**|**Standard cable**<br>**2.4-mm dia.**<br>**(7/0.127-mm dia.),**<br>**3 conductors**<br>**(**|**Robotics cable**<br>**2.4-mm dia.**<br>**20/0.08-mm dia.),**<br>**3 conductors**|
|---|---|---|---|
|**Test**||||
|**Con-**<br>**tents/**<br>**condi-**<br>**tions**|**Bending angle (****)**|90each to the left and right||
||**Bending speed**|50 times/min||
||**Load**|200 g||
||**Operation per bend**|Once in 1 to 3 in the diagram||
||**Curvature radius of**<br>**support point (R)**|5 mm||
|**Result**||Approx. 14,000 times<br>Ap|prox. 400,000 times|



## Adjusting 

## **Indicators** 

- The following graphs indicate the status of each operating level. 

- Be sure to use the E3T within the stable operating range. 

**==> picture [197 x 120] intentionally omitted <==**

**----- Start of picture text -----**<br>
Stability  Operation indicator (orange)<br>indicator  E3T-@@@1 E3T-@@@2<br>(green)  E3T-@@@3 E3T-@@@4<br>Stable<br>operation  ON<br>range [*] Operating  ON  OFF<br>level x 1.2<br>Unstable Operating  OFF<br>operation level<br>range [*]<br>Operating<br>Stable  level x 0.8  OFF  ON<br>ON<br>operation<br>range [*]<br>ht<br>g<br>Li<br>**----- End of picture text -----**<br>


- If the E3T fs operating level is set to the stable operation range, the E3T will be in most reliable operation without being influenced by temperature change, voltage fluctuation, dust, or setting change. If the operating level cannot be set to the stable operation range, pay attention to environmental changes while operating the E3T. 

## **Use of E39-E10 Sensitivity Adjustment Unit** 

(Dark-ON: E3T-ST12) 

**==> picture [156 x 78] intentionally omitted <==**

**----- Start of picture text -----**<br>
(At Min)  (At Center)  (At Max.)<br>Indicator<br>Adjuster<br>**----- End of picture text -----**<br>


1. Mount the Unit on the Receiver. 

2. Set the adjuster of the Sensitivity Adjustment Unit to Max. (Before shipping: Max.) 

3. After mounting on the Sensor, adjust the optical axis and secure the Sensor. 

4. Place a workpiece between the Emitter and Receiver and gradually turn the adjuster counterclockwise toward the Min. side. Stop turning the adjuster when the operation indicator and stability indicator (green) turn ON. 

5. Remove the workpiece and confirm that the operation indicator is OFF and the stability indicator (green) is ON. This completes the adjustment. 

Note: If the light attenuation rate due to a workpiece is 40% or less, the stability indicator will not turn ON whether or not light is received. When the variation of light is small such as when sensing semi-transparent workpieces, carefully perform preliminary testing. 

## Others 

## **Do not install the E3T in the following locations.** 

- Locations subject to excessive dust or dirt 

- Locations subject to direct sunlight 

- Locations subject to corrosive gas 

- Locations subject to contact with organic solvents 

- Locations subject to vibration and shock 

- Locations subject to contact with water, oil, or chemicals 

- Locations subject to high humidities that might result in condensation 

Miniature Photoelectric Sensors 

12 

Dimensions 

(Unit: mm) 

## Sensors 

Tolerance class IT16 applies to dimensions in this datasheet unless otherwise specified. 

M2-mounting Sensors 

**==> picture [385 x 147] intentionally omitted <==**

**----- Start of picture text -----**<br>
Through-beam Side-view Sensors<br>E3T-ST1 @  (Emitter)<br>E3T-ST2 @  (Emitter)<br>E3T-ST3 @  (Emitter) 7 7 9.5 . 7 Mounting Holes<br>3.8 Two, M2 holes<br>2.7<br>Emitter  9 14.6<br>lens 9 [±0.2]<br>(1.3 dia.)<br>a ; |<br>Two, 2.2 dia. 3.9<br>2.4-dia. vinyl-insulated round cable<br>with 2 conductors (Conductor cross<br>2.2 section: 0.1 mm² (AWG27),<br>Insulator diameter: 0.7 mm),<br>Emitter: E3T-ST@@-L 4.8 Standard length: 2 m<br>Receiver: E3T-ST@@-D<br>**----- End of picture text -----**<br>


**==> picture [509 x 194] intentionally omitted <==**

**----- Start of picture text -----**<br>
M12 Smartclick Pre-wired Connector Model<br>(E3T-ST @@ -M1TJ/E3T-FT @@ -M1TJ)<br>E3T-ST1 @  (Receiver)<br>E3T-ST2 @  (Receiver) 2 1<br>E3T-ST3 @  (Receiver)<br>3 4<br>Operation  7 Stability 9.5 Mounting Holes M12<br>indicator indicator 7.7<br>Two, M2 holes 2.4-dia. vinyl-insulated round cable<br>3.8 with 2 or 3 conductors<br>Standard length: 0.3 m<br>2.7<br>9 14.6 9 [±0.2]<br>*The receiver lens diameters are  Receiver lens  [*]<br>e-CON Pre-wired Connector Model<br>given below.  (E3T-ST @@ -ECON/E3T-FT @@ -ECON)<br>Two, 2.2 dia. 3.9<br>Receiver lens<br>Model<br>diameter 2.4-dia. vinyl-insulated round cable 5.9<br>E3T-ST1@-D 2.2 yo with 3 conductors (Conductor cross  1<br>E3T-ST2@-D (1.3 dia.) 4.8 section: 0.1 mm² (AWG27),Insulator diameter: 0.7 mm), 23 15<br>E3T-ST3@-D (2.4 dia.) Standard length: 2 m 15.6 4<br>2.4-dia. vinyl-insulated round cable<br>with 2 or 3 conductors<br>Standard lengths: 0.3 m and 2 m<br>**----- End of picture text -----**<br>


**E3T-ST1** @ **(Receiver) E3T-ST2** @ **(Receiver) E3T-ST3** @ **(Receiver)** 

## **Through-beam Flat Sensors** 

**==> picture [385 x 118] intentionally omitted <==**

**----- Start of picture text -----**<br>
E3T-FT1 @  (Emitter)<br>E3T-FT2 @  (Emitter) 12 3.5<br>Mounting Holes<br>Emitter lens  Two, M2 holes<br>(1.3 dia.) 8.6 14 15.8<br>8 [±0.2]<br>Two, 2.2 dia. 3.2<br>2.4-dia. vinyl-insulated round cable<br>with 2 conductors (Conductor cross section: 0.1 mm² (AWG27), 4.4 1.75<br>tT Insulator diameter: 0.7 mm), ke 8 fT<br>Standard length: 2 m<br>**----- End of picture text -----**<br>


|**Termi-**|**Specifica-**|
|---|---|
|**nal No.**<br>**1**<br>**2**<br>**3**|**tions**<br>**+V**<br>**---**<br>**0 V**|
|**4**|**Output**<br>**(receiver only)**|



* Refer to <Italic>Mounting the Sensor on Moving Parts on page 12 for details on Robotics Cable models. 

Emitter: E3T-FT@@-L Receiver: E3T-FT@@-D 

**E3T-FT1** @ **(Receiver) E3T-FT2** @ **(Receiver)** 

**==> picture [276 x 103] intentionally omitted <==**

**----- Start of picture text -----**<br>
12 3.5<br>Operation indicator Stability indicator Mounting Holes<br>Receiver  Two, M2 holes<br>lens (1.3 dia.) 8.6 14 15.8<br>8 [±0.2]<br>Two, 2.2 dia. Bol d 3.2 =<br>2.4-dia. vinyl-insulated round cable<br>with 3 conductors (Conductor cross  4.4 1.75<br>section: 0.1 mm² (AWG27),<br>Insulator diameter: 0.7 mm), 8<br>Standard length: 2 m<br>**----- End of picture text -----**<br>


**E3T** 

13 

## **Retro-reflective Side-view Sensors** 

**E3T-SR4** @ 

**==> picture [509 x 561] intentionally omitted <==**

**----- Start of picture text -----**<br>
Mounting Holes<br>Two, M2 holes<br>Operation  7 Stability  11<br>indicator indicator<br>9 .2<br>3.8 15±0.2<br>4.5<br>Lens 15 20.6<br>(2.0 dia.)<br>4 a= =o, —<br>Two, 2.2 dia. 3.9<br>4: 3.7 2.4-dia. vinyl-insulated round cablewith 3 conductors (Conductor cross  : M12 Smartclick Pre-wired Connector Model(E3T-SRE3T- SL@@@@ -M1TJ)-M1TJ/E3T- FD@@ -M1TJ/<br>6.3 section: 0.1 mm² (AWG27),<br>Insulator diameter: 0.7 mm),<br>Standard length: 2 m 2 1<br>3 4<br>a \_ M12<br>Diffuse-reflective Flat Sensors  2.4-dia. vinyl-insulated round cable<br>E3T-FD1 @ with 3 conductors<br>Standard length: 0.3 m<br>raw) e-CON Pre-wired Connector<br>Operation indicator 12 Stability indicator 3.5 (E3T-SRE3T- SL@@@@ -ECON)-ECON/E3T- FD@@ -ECON/<br>5.9<br>Emitter lens Mounting Holes 1<br>es (1.5 dia.) r id 4 < Two, M2 holes 23 15<br>Receiver lens (2.0 dia.) 13.4 19 20.8 15.6 4<br>8 [±0.2] 2.4-dia. vinyl-insulated round cable<br>with 3 conductors<br>Two, 2.2 dia. 3.2 Standard lengths: 0.3 m and 2 m<br>2.4-dia. vinyl-insulated round cable<br>with 3 conductors (Conductor cross  4.4<br>section: 0.1 mm² (AWG27),Insulator diameter: 0.7 mm), 8 1.75 Terminal No. Specifi-cations<br>5 Standard length: 2 m es ee<br>1 +V<br>2 ---<br>Convergent-reflective Side-view Sensors 3 0 V<br>E3T-SL1 @ 4 Output<br>E3T-SL2 @<br>* Refer to <Italic>Mounting the<br>Sensor on Moving Parts on page<br>12 for details on Robotics Cable<br>Operation indicator 7 Stability indicator 9.2 11 Mounting Holes models.<br>Two, M2 holes<br>3.8<br>Emitter lens 4<br>Receiver lens(4.0 dia.) 5 15 20.6 15±0.2<br>(4.0 dia.)<br>Two, 2.2 dia. 3.9<br>2.4-dia. vinyl-insulated round cable<br>with 3 conductors (Conductor cross  3.7<br>section: 0.1 mm² (AWG27), 6. 3<br>Insulator diameter: 0.7 mm),<br>Standard length: 2 m<br>**----- End of picture text -----**<br>


Miniature Photoelectric Sensors 

14 

## **BGS-reflective Flat Sensors** 

**E3T-FL1** @ **E3T-FL2** @ 

**==> picture [412 x 218] intentionally omitted <==**

**----- Start of picture text -----**<br>
M12 Smartclick Pre-wired Connector Model<br>(E3T-FL @@ -M1TJ) 2 1<br>3 4<br>M12<br>Operation  12 Stability  3.5<br>indicator indicator 2.4-dia. vinyl-insulated round cable<br>with 3 conductors<br>Standard length: 0.3 m<br>Receiver lens<br>(2.8 square) e-CON Pre-wired Connector<br>Emitter lens 6 19 20.8 Mounting Holes (E3T-FL @@ -ECON) 1 5.9<br>(1.5 dia.) 7.4 Two, M2 holes 23 15<br>4<br>Two, 2.2 dia. Fe 3.2 8 [±0.2] 15.6<br>2.4-dia. vinyl-insulated round cable aa mi 2.4-dia. vinyl-insulated round cablewith 3 conductors<br>with 3 conductors (Conductor cross  4.4 1.75 Standard lengths: 0.3 m and 2 m<br>section: 0.1 mm² (AWG27),Insulator diameter: 0.7 mm), 8 By vet<br>Standard length: 2 m Termi- Specifi-<br>nal No. cations<br>1 +V<br>2 ---<br>3 0 V<br>4 Output<br>**----- End of picture text -----**<br>


* Refer to <Italic>Mounting the Sensor on Moving Parts on page 12 for details on Robotics Cable 

M3-mounting Sensors 

**==> picture [431 x 375] intentionally omitted <==**

**----- Start of picture text -----**<br>
Through-beam Side-view Sensors<br>E3T-ST1 @ M (Emitter)<br>{-- - --}<br>E3T-ST2 @ M (Emitter) Mounting Holes<br>12.8<br>7 10 3 Two, M3 holes<br>Emitter  6.5<br>lens  13 13 [±0.2]<br>= (1.3 dia.) mo a7 22 £<br>Two, 3.2 dia.<br>co a t<br>2.5<br>2.4-dia. vinyl-insulated round cable<br>3.9 with 2 conductors (Conductor cross<br>4 - |4 section: 0.1 mm² (AWG27),<br>Emitter: E3T-ST@@M-L 6.3 Insulator diameter: 0.7 mm),<br>Receiver: E3T-ST@@M-D Standard length: 2 m<br>[+d et<br>E3T-ST1 @ M (Receiver)<br>E3T-ST2 @ M (Receiver)<br>-f----}<br>Operation  7 Stability 12.8 Mounting Holes<br>indicator indicator 10 3 Two, M3 holes<br>[| E —<br>6.5<br>13 13 [±0.2]<br>22<br>Receiver<br>lens  jo<br>(1.3 dia.) Two, 3.2 dia.<br>2.5<br>ae 2.4-dia. vinyl-insulated round cable<br>3.9 with 3 conductors (Conductor cross<br>roe section: 0.1 mm² (AWG27),<br>6.3 Insulator diameter: 0.7 mm),<br>Standard length: 2 m<br>**----- End of picture text -----**<br>


**E3T-ST1** @ **M (Receiver) E3T-ST2** @ **M (Receiver)** 

**E3T** 

15 

**Diffuse-reflective Flat Sensors E3T-FD1** @ **M** 

**==> picture [308 x 335] intentionally omitted <==**

**----- Start of picture text -----**<br>
Operation  Stability<br>indicator 12.6 indicator 4 Mounting Holes<br>Two, M3 holes<br>Emitter lens(1.5 dia.) ae 414.820.4 23.4 | | oe 10 [±0.2]<br>Receiver<br>lens (2.0 dia.)<br>Two, 3.2 dia. 3.1<br>2.4-dia. vinyl-insulated round cable<br>4.2 with 3 conductors (Conductor cross  3.5<br>lst 16 10 section: 0.1 mm² (AWG27),<br>Insulator diameter: 0.7 mm),<br>Standard length: 2 m<br>-[ +- -- } -<br>Mounting Holes<br>Operation  7 Stability  1 2.8 Two, M3 holes<br>indicator indicator 10 3<br>4.8<br>Emitter lens 16 [±0.2]<br>(4.0 dia.) 5 16<br>22<br>Receiver lens<br>(4.0 dia.)<br>-  fe 4<br>3.9 2.5<br>6.3 Two, 3.2 dia.<br>| an e<br>2.4-dia. vinyl-insulated round cable<br>with 3 conductors (Conductor cross<br>section: 0.1 mm² (AWG27),<br>Insulator diameter: 0.7 mm),<br>Standard length: 2 m<br>**----- End of picture text -----**<br>


**Convergent-reflective Side-view Sensors E3T-SL1** @ **M E3T-SL2** @ **M** 

Miniature Photoelectric Sensors 

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## Accessories (Order Separately) 

**==> picture [502 x 193] intentionally omitted <==**

**----- Start of picture text -----**<br>
Tape Reflectors<br>E39-RS3-CA<br>E39-RS1-CA<br>35 0.5<br>10 80 0.5<br>Four, R1 Adhesive tape side<br>Material: Acrylic<br>E39-RS2-CA<br>70<br>40 0.5<br>35<br>Four, R1 Adhesive tape side<br>Material: Acrylic<br>Four, R1 Adhesive tape side<br>Material: Acrylic<br>**----- End of picture text -----**<br>


**==> picture [505 x 428] intentionally omitted <==**

**----- Start of picture text -----**<br>
Mutual Interference Prevention Filter for Slit for E3T-ST@@ Through-beam Sen- Slit for E3T-FT@@ Through-beam Sen-<br>E3T-ST3@/ST1@ Through-beam Sen- sors sors<br>sors E39-S63 E39-S64<br>E39-E14<br>2 With Filter Attachment q With Slit Attachment With Slit Attachment<br>9.9<br>7.4 8.1 7.4 1.0 [±0.05][ dia.] 9.7 Two, 2.2 dia. 12.3 (4.1)<br>— 3.8 i f _ 0.5 [±0.05][ dia.] — t<br>3 dia. 2.7<br>12.6<br>Optical  18.5 2.7 9 Notch 2.7 12<br>axis<br>1 dia.<br>0.5 dia.<br>sb 8.1 Material: 0.2-mm  Note: Align the notch direction<br>Material: 0.2-mm thick stain- thick stainless steel  00 of the Slit when  Material: 0.1-mm thick stain- oF<br>less steel (SUS301) (SUS301) installing on the Emitter  less steel (SUS301)<br>and Receiver.<br>0.5-dia Slit for E3T-ST@@M  1-dia Slit for E3T-ST@@M  Sensitivity Adjustment Unit<br>Through-beam Sensors  Through-beam Sensors for E3T-ST1@/ST3@<br>E39-S76A E39-S76B Through-beam Sensors<br>E39-E10<br>With Slit Attachment With Slit Attachment<br>With Sensitivity Adjustment<br>Unit Attachment<br>7.4 13.2 7.4 13.2 5.8<br>1 30 .2 Two, 3.2 dia. 1 30 .2 Two, 3.2 dia. 90°<br>0.5±0.05 dia. 1.0±0.1 dia. 7.4 (10.1)<br>6.5 6.5<br>ne Ue ul { a l l<br>19 19 4<br>12.2 12.2<br>(15.1) 18.7<br>Optical  2 dia.<br>axis Adjuster<br>He Material: 0.2-mm thick stain- Material: 0.2-mm thick stainless steel  9. 7<br>less steel (SUS301) (SUS301) Material: stainless steel (SUS301)<br>0 Ve<br>**----- End of picture text -----**<br>


**E3T** 

17 

Mounting Bracket for M2-mounting Side-view Sensors **E39-L116** 

**==> picture [501 x 289] intentionally omitted <==**

**----- Start of picture text -----**<br>
E39-L116 (Two, R1.7)<br>(17.8) 7.5<br>Two, 3.4<br>4.1<br>1.6 (Two, R2)<br>5 (Two, R2)<br>4<br>2.2<br>; 11<br>Material: 1.2-mm-thick<br>(10.3)<br>stainless steel  (Two, R1.1)<br>(SUS304) 31.2 9.5<br>9.7<br>6.2<br>| Min:<br>90° 17.8<br>> i ] (Two, R1.2) a<br>2.4<br>R1.5 max. 1.2 10 With Mounting Bracket (Example: E3T-ST11) 7.7<br>(Four, R2) Two, M2 × 14<br>Three, M2<br>3<br>9<br>20.5 15<br>31 31.2<br>24.5<br>7<br>**----- End of picture text -----**<br>


Mounting Bracket for M2-mounting Side-view Sensors **E39-L117** 

**==> picture [490 x 290] intentionally omitted <==**

**----- Start of picture text -----**<br>
R1 max.<br>90°<br>1.2<br>(Two, R1.7) Two, R2 (Two, R2) 2.4<br>e 11.2<br>Material: 1.2-mm-thick stainless  3.1 4<br>steel (SUS304)<br>9<br>11.5 18 (23) 15<br>9<br>3.1<br>3.4 (Two, R1.7) 5 Two, 2.2 (10.3)<br>4.5 5 (Two, R1.1)<br>10<br>(11.2) 11.2<br>.bil 7.7 6.2<br>With Mounting Bracket (Example: E3T-ST11)<br>Two, M2 × 14<br>(Four, R2) Three, M2 10.2 11.2<br>3<br>9 {FO |<br>20.5 15 23<br>16.3<br>7<br>**----- End of picture text -----**<br>


Miniature Photoelectric Sensors 

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**==> picture [490 x 659] intentionally omitted <==**

**----- Start of picture text -----**<br>
Mounting Bracket for M2-mounting Side-view Sensors<br>E39-L118 11.5 =| 1.2<br>11.5 90°<br>90°<br>. ry 22.7<br>5 (Two, R1.7)<br>2.4 4.5<br>3.1<br>l a 4 ‘n,<br>Material: 1.2-mm-thick stainless<br>steel (SUS304) 9<br>15 11.5 18 (23)<br>9<br>[Li tea t EE<br>Two, 2.2 3.1<br>5<br>(Two, R1.1) 3.4 (Four, R2)<br>i can <- a: 7.7<br>With Mounting Bracket (Example: E3T-ST11)<br>(Four, R2) Two, M2 × 14 13.2<br>Three, M2<br>3<br>9<br>o e A (e o )<br>20.5 15 23<br>16.3<br>7<br>Mounting Bracket for M2-mounting Flat Sensors<br>E39-L119<br>With Mounting Bracket<br>yy 90° 1.2 (Example: E3T-FT11)<br>10.5<br>15<br>Four, M2 tapped holes<br>8 3.2 9 3.5 7<br>2.4<br>a 16 12 _ 8 a<br>Material: 1.2-mm-thick stainless  10.6<br>steel (SUS304)<br>2.4<br>9 7<br>Two, M2 × 8<br>Mounting Bracket for M2-mounting Flat Sensors<br>E39-L120 With Mounting Bracket<br>(Example: E3T-FT11)<br>4.2<br>(5.4) (6.4)<br>14 1.2<br>22.5<br>Four, M2 tapped holes<br>8 3.2 13.5<br>2.4<br>Wl oe<br>Material: 1.2-mm-thick stainless<br>steel (SUS304) 16 12 8 10.6<br>2.4<br>6 1 3.5 Two, M2 × 8<br>**----- End of picture text -----**<br>


**E3T** 

19 

Mounting Bracket for M3-mounting Side-view Sensors **E39-L166** 

**==> picture [508 x 486] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.2<br>13.5 90°<br>4.5<br>3.4 3 2.8<br>3.1<br>3.2<br>14.5<br>11.5 23<br>Material: 1.2-mm-thick stainless<br>steel (SUS304) (12.6)<br>3.1 3<br>Two, R2<br>3.2<br>6.5<br>13.8 13.5<br>(15)<br>8 With Mounting Bracket 10 8.5<br>4 (Example: E3T-ST11M)<br>3 Three, M3 12.5 Two, M3 × 15 15<br>12.9<br>16 22 23<br>13.5<br>vB<br>Mounting Bracket for M3-mounting Flat Sensors With Mounting Bracket<br>E39-L167 (Example: E3T-FD11M)<br>(6.5)<br>(10.5)<br>5 18 1.5<br>29<br>Four, M3 tapped holes 3.2 17<br>10<br>2.4<br>23.5<br>17.5 14.5<br>Material: 1.5-mm-thick stainless  17.8<br>13.8<br>steel (SUS304)<br>2.4<br>Two, M3 × 6<br>17<br>**----- End of picture text -----**<br>


Back-mounting Spacer for M3-mounting Flat Sensors **E39-L168** 

**==> picture [257 x 124] intentionally omitted <==**

**----- Start of picture text -----**<br>
4<br>12.6 0.3<br>14.8<br>28.7 10.8<br>8.3<br>Material: PBT (polybutylene<br>terephthalate)<br>10 (7.3)<br>cy 16<br>**----- End of picture text -----**<br>


**==> picture [201 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
Note: Use this Spacer when mounting the Sensor from the back.<br>**----- End of picture text -----**<br>


Miniature Photoelectric Sensors 

20 

## **READ AND UNDERSTAND THIS DOCUMENT** 

Please read and understand this document before using the products. Please consult your OMRON representative if you have any questions or comments. 

## **WARRANTY** 

OMRON’s exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by OMRON. 

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED. 

## **LIMITATIONS OF LIABILITY** 

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY. 

In no event shall responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted. 

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS OMRON’S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR. 

## **SUITABILITY FOR USE** 

THE PRODUCTS CONTAINED IN THIS DOCUMENT ARE NOT SAFETY RATED.  THEY ARE NOT DESIGNED OR RATED FOR ENSURING SAFETY OF PERSONS, AND SHOULD NOT BE RELIED UPON AS A SAFETY COMPONENT OR PROTECTIVE DEVICE FOR SUCH PURPOSES.  Please refer to separate catalogs for OMRON's safety rated products. 

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer’s application or use of the product. 

At the customer’s request, OMRON will provide applicable third party certification documents identifying ratings and limitations of use that apply to the products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end product, machine, system, or other application or use. 

The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses listed may be suitable for the products: 

- Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this document. 

- Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations. 

- Systems, machines, and equipment that could present a risk to life or property. 

Please know and observe all prohibitions of use applicable to the products. 

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM. 

## **PERFORMANCE DATA** 

Performance data given in this document is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of OMRON’s test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and Limitations of Liability. 

## **CHANGE IN SPECIFICATIONS** 

Product specifications and accessories may be changed at any time based on improvements and other reasons. 

It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the product may be changed without any notice. When in doubt, special model numbers may be assigned to fix or establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual specifications of purchased products. 

## **DIMENSIONS AND WEIGHTS** 

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown. 

## **ERRORS AND OMISSIONS** 

The information in this document has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical, or proofreading errors, or omissions. 

## **PROGRAMMABLE PRODUCTS** 

OMRON shall not be responsible for the user’s programming of a programmable product, or any consequence thereof. 

## **COPYRIGHT AND COPY PERMISSION** 

This document shall not be copied for sales or promotions without permission. 

This document is protected by copyright and is intended solely for use in conjunction with the product. Please notify us before copying or reproducing this document in any manner, for any other purpose. If copying or transmitting this document to another, please copy or transmit it in its entirety. 

**E3T** 

21 

Cat. No. E71E-EN-01 **In the interest of product improvement, specifications are subject to change without notice.** 

## **OMRON EUROPE B.V.** 

Wegalaan 67-69, NL-2132 JD, Hoofddorp, The Netherlands Phone: +31 23 568 13 00 Fax: +31 23 568 13 88 www.industrial.omron.eu 

Miniature Photoelectric Sensors 

22 



## Links

- [View this product on Novapart](https://novapart.co/products/E3T-SL23%202M/photoelectric-sensor-pnp-open-collector-30-mm-50)
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- [Supplier page](https://es.farnell.com/omron/e3t-sl23-2m/photoelectric-sensor-pnp-30mm/dp/3413997)
---

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