GSE20M-QK112170ZZZ

Photoelectric Sensor, 120 m, Push Pull, NPN / PNP, Through Beam, Terminal Block, 10 to 30 VDC

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: SICK
Product type:
SVHC: No SVHC (21-Jan-2025)
Product Range: G20 Series
Sensing Method: Through Beam
Connection Method: Terminal Block
Sensing Range Max: 120m
Sensor Output Type: Push Pull, NPN / PNP
Supply Voltage DC Max: 30V
Supply Voltage DC Min: 10V

Delivery and price
Units per pack	50
Price	178.93 €
Current stock	10+
Lead time	30 days

Datasheet

GSE20M-QK112170ZZZ G20 

**COMPACT PHOTOELECTRIC SENSORS** 

**GSE20M-QK112170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Ordering information 

||**Type**|**Part no.**|
|---|---|---|
||GSE20M-QK112170ZZZ|1120852|
||Other models and accessories<br> www.sick.com/G20<br>=>||
|Illustration may differ|||



**==> picture [83 x 28] intentionally omitted <==**

**----- Start of picture text -----**<br>
C E CTAX<br>**----- End of picture text -----**<br>


## Detailed technical data 

## Features 

|**Functional principle**|Through-beam photoelectric sensor|
|---|---|
|**Sensing range**<br>Sensing range min.<br>Sensing range max.<br>Maximum distance range from receiver to<br>sender (operating reserve 1)<br>Recommended distance range from receiver to<br>sender (operating reserve 2)|0 m<br>120 m<br>0 m ... 120 m<br>0 m ... 85 m|
|**Emitted beam**<br>Light source<br>Type of light<br>Shape of light spot<br>Light spot size (distance)<br>Maximum dispersion of the emitted beam<br>around the standardized transmission axis<br>(squint angle)|LED<br>Infrared light<br>Rectangular<br>Ø 800 mm (20,000 mm)<br>< +/- 1.5° (at Ta = +23 °C)|
|**Key LED figures**<br>Normative reference<br>LED risk group marking<br>Wave length<br>Average service life|EN 62471:2008-09 | IEC 62471:2006, modified<br>Free group<br>850 nm<br>100,000 h at Ta= +25 °C|
|**Adjustment**<br>Potentiometer|For sensitivity adjustment, 270°|
|**Indication**<br>LED green<br>LED yellow|Operating indicator<br>Static on: power on<br>Static off: object present<br>Status of received light beam<br>Static on: object not present<br>Static off: object present|



**Product data sheet | 2024-04-18 15:09:43 Subject to change without notice** 

**2** 

**PHOTOELECTRIC SENSORS | SICK** 

**GSE20M-QK112170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Electrical data 

|**Supply voltage UB**|10 V DC ... 30 V DC1)|
|---|---|
|**Ripple**|< 5 Vpp|
|**Usage category**|DC-13 (according to EN 60947-1)|
|**Current consumption**|≤ 30 mA, without load. At UB= 24 V|
|**Protection class**|III|
|**Digital output**||
|Number|2 (Complementary)|
|Type|Push-pull: PNP/NPN|
|Signal voltage PNP HIGH/LOW|VS- (≤ 3 V) / approx. 0 V|
|Signal voltage NPN HIGH/LOW|VS- (≤ 3 V) / approx. 0 V|
|Output current Imax.|≤ 100 mA2)|
|Circuit protection outputs|Reverse polarity protected<br>Overcurrent protected<br>Short-circuit protected|
|Response time|≤ 500 µs|
|Switching frequency|1,000 Hz3)|
|**Pin/Wire assignment, sender**||
|BN 1|+ (L+)|
|WH 2|-|
|BU 3|- (M)|
|BK 4|Test -> M<br>Input, sender off, LOW active|
|**Pin/Wire assignment, receiver**||
|BN 1|+ (L+)|
|WH 2|Ǭ<br>Digital output, dark switching, object present → outputǬHIGH<br>The pin 2 function of the sensor can be switched|
|BU 3|- (M)|
|BK 4|Q<br>Digital output, light switching, object present → output Q LOW<br>The pin 4 function of the sensor can be switched|



- 1) Limit values UB connections, reverse polarity protected. 

- 2) At UB > 24 V, I max. = 100 mA. 

- 3) With light/dark ratio 1:1. 

## Mechanical data 

|**Housing**|Rectangular|
|---|---|
|**Dimensions (W x H x D)**|23.5 mm x 74.5 mm x 52.5 mm|
|**Connection**|Terminal connection, 4 terminals|
|**Material**||
|Housing|Plastic, ABS|
|Front screen|Plastic, PMMA|
|**Weight**|Approx. 171 g|



**2024-04-18 15:09:43 | Product data sheet Subject to change without notice** 

**PHOTOELECTRIC SENSORS | SICK** 

**3** 

**GSE20M-QK112170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Ambient data 

|**Enclosure rating**|IP67 (EN 60529)|
|---|---|
|**Ambient operating temperature**|–30 °C ... +60 °C|
|**Ambient temperature, storage**|–40 °C ... +70 °C|
|**Typ. Ambient light immunity**|Sunlight: ≤ 20,000 lx|
|**Shock resistance**|30 g, 11 ms (3 positive and 3 negative shocks along X, Y, Z axes, 18 total shocks|
||(EN60068-2-27))|
|**Vibration resistance**|10 Hz ... 1,000 Hz (Amplitude 1 mm, 3 x 30 min (EN60068-2-6))|
|**Air humidity**|35 % ... 95 %, Relative humidity (no condensation)|
|**Electromagnetic compatibility (EMC)**|EN 60947-5-21)|
|**UL File No.**|NRKH.E348498 & NRKH7.E348498|



1) The device can cause interference when it is used in a residential environment. 

## Classifications 

|**ECLASS 5.0**|27270901|
|---|---|
|**ECLASS 5.1.4**|27270901|
|**ECLASS 6.0**|27270901|
|**ECLASS 6.2**|27270901|
|**ECLASS 7.0**|27270901|
|**ECLASS 8.0**|27270901|
|**ECLASS 8.1**|27270901|
|**ECLASS 9.0**|27270901|
|**ECLASS 10.0**|27270901|
|**ECLASS 11.0**|27270901|
|**ECLASS 12.0**|27270901|
|**ETIM 5.0**|EC002716|
|**ETIM 6.0**|EC002716|
|**ETIM 7.0**|EC002716|
|**ETIM 8.0**|EC002716|
|**UNSPSC 16.0901**|39121528|



**4** 

**Product data sheet | 2024-04-18 15:09:43 Subject to change without notice** 

**PHOTOELECTRIC SENSORS | SICK** 

**GSE20M-QK112170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Adjustments 

Display and adjustment elements 

**==> picture [99 x 224] intentionally omitted <==**

**----- Start of picture text -----**<br>
2<br>②   LED yellow<br>**----- End of picture text -----**<br>


Display and adjustment elements 

**==> picture [120 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
3<br>1 2<br>①   LED green<br>②   LED yellow<br>③   Potentiometer<br>**----- End of picture text -----**<br>


## Connection type 

**==> picture [27 x 70] intentionally omitted <==**

**----- Start of picture text -----**<br>
4<br>3<br>2<br>1<br>**----- End of picture text -----**<br>


**2024-04-18 15:09:43 | Product data sheet Subject to change without notice** 

**PHOTOELECTRIC SENSORS | SICK** 

**5** 

**GSE20M-QK112170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

## Characteristic curve 

**==> picture [214 x 232] intentionally omitted <==**

**----- Start of picture text -----**<br>
Operating reserve<br>1,000<br>a<br>PY t TP<br>100<br>A<br>=<br>a, a<br>PT ING Pt<br>10<br>— tt<br>1 COTS<br>0 20 40 60 80 100 120<br>(65.62) (131.23) (196.85) (262.47) (328.08) (393.70)<br>Distance in m (feet)<br>**----- End of picture text -----**<br>


## Light spot size 

**==> picture [242 x 104] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions in m (feet)<br>3<br>(9.84)<br>1.5<br>(4.92) TEE c o—\g<br>0<br>aa<br>–1.5<br>(–4.92) SS gel<br>–3<br>(–9.84) 0 Sos 20 40 60 80 100 120 | pe<br>(65.62) (131.23)(196.85)(262.47)(328.08) (393.70) 20 120<br>Distance in m (feet) (65.62) (393.70)<br>**----- End of picture text -----**<br>


## Sensing range diagram 

**==> picture [186 x 162] intentionally omitted <==**

**----- Start of picture text -----**<br>
0 85 120<br>0 40 80 120<br>(131.23) (262.47) (393.70)<br>Distance in m (feet)<br>D<br>C<br>A B<br>A Sensing range min. in mm<br>B Sensing range max. in mm<br>C Maximum distance range from receiver to sender<br>**----- End of picture text -----**<br>


**6** 

**Product data sheet | 2024-04-18 15:09:43 Subject to change without notice** 

**PHOTOELECTRIC SENSORS | SICK** 

**GSE20M-QK112170ZZZ | G20** COMPACT PHOTOELECTRIC SENSORS 

D Recommended distance range from receiver to sender 

## Dimensional drawing (Dimensions in mm (inch)) 

**==> picture [215 x 163] intentionally omitted <==**

**----- Start of picture text -----**<br>
63 (2.48)<br>23.5 (0.93) 41.2 (1.62)<br>1<br>3 _. oy.<br>Tt "7 L ae<br>2<br>4<br>1<br>P| 5 (0.20) a 4.8 (0.19) t<br>43.2 (1.70)<br>54.8 (2.16)<br>(0.17)<br>Ø 4.3<br>(0.08)<br>2.15<br>)<br>) (0.09)<br>2.52( (2.93)<br>(2.09) 0.71( 2.3<br>53.1  18  63.9  74.5<br>5.3<br>(0.21)<br>**----- End of picture text -----**<br>


- ① Display and adjustment elements 

- ② Center of optical axis, sender 

- ③ Center of optical axis, receiver 

- ④ Fixing hole ø 4.3 mm, both sides for hexagon nut M4 

## Recommended accessories 

**==> picture [485 x 69] intentionally omitted <==**

**----- Start of picture text -----**<br>
||||
|---|---|---|
|Other models and accessories|>|www.sick.com/G20|
|Brief description|Type|Part no.|
|Mounting brackets and plates|
|Mounting bracket, Stainless steel V2A (1.4301), 2 screws, 2 nuts, 2 circlips, 2 washers|BEF-W280|5313885|
|for mounting the sensor|

**----- End of picture text -----**<br>


**2024-04-18 15:09:43 | Product data sheet Subject to change without notice** 

**PHOTOELECTRIC SENSORS | SICK** 

**7** 

## SICK At A GlAnCe 

SICK is one of the leading manufacturers of intelligent sensors and sensor solutions for industrial applications. A unique range of products and services creates the perfect basis for controlling processes securely and efficiently, protecting individuals from accidents and preventing damage to the environment. 

We have extensive experience in a wide range of industries and understand their processes and requirements. With intelligent sensors, we can deliver exactly what our customers need. In application centers in Europe, Asia and North America, system solutions are tested and optimized in accordance with customer specifications. All this makes us a reliable supplier and development partner. 

Comprehensive services complete our offering: SICK lifetime Services provide support throughout the machine life cycle and ensure safety and productivity. 

For us, that is “Sensor Intelligence.” 

## WOrldWIde preSenCe: 

Contacts and other locations www.sick.com 

SICK AG | Waldkirch | Germany | www.sick.com

Updated at April 1, 2026

SICK is a globally recognized leader in factory and logistics automation technology, renowned for engineering advanced sensors and developing innovative digital services. Driven by a commitment to high precision, reliability, and versatility, the company provides the foundational components required to transform traditional manufacturing processes into intelligent, self-optimizing systems that adapt autonomously using real-time data. Our comprehensive selection of SICK products is heavily focused on their industry-leading sensing technologies. We offer a robust portfolio of light sensors designed to deliver exceptional accuracy and performance in demanding industrial environments. Furthermore, our extensive range features high-quality proximity sensors and switches, providing the dependable object detection essential for automated production, packaging, and material handling applications. To ensure seamless integration of these advanced sensor networks, our offering is complemented by specialized connectivity solutions such as SICK fiber optic lead assemblies. From consumer goods and electronics to logistics and automotive manufacturing, SICK delivers the cutting-edge automation technology necessary to maximize operational efficiency and maintain continuous, reliable performance across diverse industrial sectors.

About Novapart

Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.

Learn more →

Stock Shortage Specialist

When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.

Request a quote →

Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.

BOM Analysis service →