KTM-MB31191P

Contrast Sensor, 12.5mm, NPN/PNP, 50mA, 12 to 24VDC, KTM Series

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Manufacturer: SICK
Product type:
SVHC: No SVHC (21-Jan-2025)
Photo Current: 50mA
Product Range: KTM Series
Sensing Range Max: 12.5mm
Sensor Output Type: NPN / PNP
Supply Voltage DC Max: 24V
Supply Voltage DC Min: 12V

Delivery and price
Units per pack	50
Price	168.21 €
Current stock	10+
Lead time	30 days

Datasheet

KTM-MB31191P KTM 

**CONTRAST SENSORS** 

**KTM-MB31191P | KTM** CONTRAST SENSORS 

## Ordering information 

|**Type**<br>KTM-MB31191P<br>Other models and accessories<br> www.sick.com/KTM|**Part no.**<br>1062203|
|---|---|



Illustration may differ ~~&~~ ti ~~l~~ 

## Detailed technical data 

## Features 

|**Dimensions (W x H x D)**|12 mm x 31.5 mm x 21 mm|
|---|---|
|**Sensing distance**|≤ 12.5 mm|
|**Sensing distance tolerance**|± 3 mm|
|**Housing design**|Small|
|**Light source**|LED, white1)|
|**Light emission**|Long side of housing|
|**Light spot size**|Ø 2 mm (12.5 mm)|
|**Light spot direction**|Round|
|**Receiving filters**|None|
|**Adjustment**|Potentiometer|



- 1) Average service life: 100,000 h at TU = +25 °C. 

## Mechanics/electronics 

|**Supply voltage**|12 V DC ... 24 V DC1)|
|---|---|
|**Ripple**|≤ 5 Vpp 2)|
|**Current consumption**|< 50 mA3)|
|**Switching frequency**|10 kHz4)|
|**Response time**|50 µs5)|
|**Jitter**|25 µs|



- 1) Limit values: DC 12 V (–10 %) ... DC 24 V (+20 %). Operation in short-circuit protected network max. 8 A. 

- 2) May not exceed or fall below Uv tolerances. 

- 3) Without load. 

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

- 5) Signal transit time with resistive load. 

- 6) Total current of all Outputs. 

**Product data sheet | 2024-04-15 09:25:50 Subject to change without notice** 

**2 CONTRAST SENSORS | SICK** 

**KTM-MB31191P | KTM** CONTRAST SENSORS 

|**Switching output**|PNP, NPN|
|---|---|
|**Switching output (voltage)**|PNP: HIGH = UV≤ 2 V / LOW approx. 0 V, NPN: HIGH = approx. UV/ LOW ≤ 2 V|
|**Switching mode**|Light/dark switching|
|**Output current Imax.**|50 mA6)|
|**Time delay**|None|
|**Connection type**|Male connector M8, 4-pin|
|**Protection class**|III|
|**Circuit protection**|UVconnections, reverse polarity protected<br>Output Q short-circuit protected<br>Interference pulse suppression|
|**Enclosure rating**|IP67|
|**Weight**|20 g|
|**Housing material**|Plastic, ABS|
|**Optics material**|Plastic, PMMA|
|**Indication**|LED indicator green: power on<br>LED indicator, yellow: Status switching output Q|



- 1) Limit values: DC 12 V (–10 %) ... DC 24 V (+20 %). Operation in short-circuit protected network max. 8 A. 

- 2) May not exceed or fall below Uv tolerances. 

- 3) Without load. 

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

- 5) Signal transit time with resistive load. 

- 6) Total current of all Outputs. 

## Ambient data 

|**Ambient operating temperature**|–10 °C ... +55 °C|
|---|---|
|**Ambient temperature, storage**|–20 °C ... +75 °C|
|**Shock load**|According to IEC 60068|
|**UL File No.**|NRKH.E348498 & NRKH7.E348498|



## Classifications 

|**ECLASS 5.0**|27270906|
|---|---|
|**ECLASS 5.1.4**|27270906|
|**ECLASS 6.0**|27270906|
|**ECLASS 6.2**|27270906|
|**ECLASS 7.0**|27270906|
|**ECLASS 8.0**|27270906|
|**ECLASS 8.1**|27270906|
|**ECLASS 9.0**|27270906|
|**ECLASS 10.0**|27270906|
|**ECLASS 11.0**|27270906|
|**ECLASS 12.0**|27270906|
|**ETIM 5.0**|EC001820|
|**ETIM 6.0**|EC001820|
|**ETIM 7.0**|EC001820|
|**ETIM 8.0**|EC001820|



**2024-04-15 09:25:50 | Product data sheet Subject to change without notice** 

**CONTRAST SENSORS | SICK** 

**3** 

**KTM-MB31191P | KTM** CONTRAST SENSORS 

## **UNSPSC 16.0901** 

39121528 

## Connection/Pin assignment 

|**Connection type**||Male connector M8, 4-pin|
|---|---|---|
|**Pin assignment**|||
||BN 1|+ (L+)|
||WH 2|QNPN|
||BU 3|- (M)|
||BK 4|QPNP|



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

**==> picture [272 x 222] intentionally omitted <==**

**----- Start of picture text -----**<br>
12 21<br>(0.47) (0.83)<br> Ø 7 0.5 9.9<br>(0.28) (0.02) (0.39) 3<br>im + 4 —<br>| | ma<br>4<br>2<br>1<br>Yr : : | S ICK<br>ae a 3<br>3<br>(0.12)<br>9.7<br>(0.38)<br>5.6<br>(0.22)<br>0.5<br>(0.02)<br> (1.00) 1.12)( 1.24)(<br>9<br>(0.35)<br>25.4 28.5  31.5<br>9.7<br>(0.38)<br>11.5 (0.45)<br>**----- End of picture text -----**<br>


- ① Center of optical axis, sender 

- ② Center of optical axis, receiver 

- ③ Mounting holes M3 

- ④ Display and adjustment elements 

**4** 

**Product data sheet | 2024-04-15 09:25:50 Subject to change without notice** 

**CONTRAST SENSORS | SICK** 

**KTM-MB31191P | KTM** CONTRAST SENSORS 

## Adjustments 

Display and adjustment elements 

**==> picture [144 x 107] intentionally omitted <==**

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


- ① Potentiometer, adjustment of switching threshold 

- ② LED yellow 

- ③ LED green 

- ④ Potentiometer, light/dark switching 

## Pin assignment 

Connection type. see table: Connection/PIN assignment 

**==> picture [72 x 46] intentionally omitted <==**

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


Male connector, M8, 4-pin, uncoded 

## Concept of operation 

Setting the switching threshold 

For example dark switching 

## **1. Position background** 

## **2. Position mark** 

## **3. Set switching threshold** 

**==> picture [359 x 76] intentionally omitted <==**

**----- Start of picture text -----**<br>
–           + –           + –           +<br>**----- End of picture text -----**<br>


Start at "+" (right-hinged). Turn potentiometer in direction "-" until the yellow LED goes out. 

Yellow LED lights up. Continue to turn the potentiometer in direction „–“ until the yellow LED goes out again. 

Turn between positions 1 and 2, to ensure that the switching threshold is optimally set. 

## **Switching characteristics** 

Light switching: yellow LED ≠ switching output Q Dark switching: yellow LED = switching output Q 

Light/dark switching selectable by means of rotary switch KTM-xBxxx1xx: potentiometer can be adjusted with a screwdriver KTM-xBxxx9xx: potentiometer can be adjusted with a screwdriver or by hand 

**2024-04-15 09:25:50 | Product data sheet Subject to change without notice** 

**CONTRAST SENSORS | SICK** 

**5** 

**KTM-MB31191P | KTM** CONTRAST SENSORS 

## Sensing distance 

**==> picture [222 x 216] intentionally omitted <==**

**----- Start of picture text -----**<br>
110 | | | pe<br>100 | | IAA TN<br>90<br>80<br>| | YP | | Kw<br>70<br>et | Pt tT<br>60<br>pt | | tT<br>50<br>pt | | TT<br>40<br>pt | | TT<br>30<br>pt | | TT<br>20<br>et | | | tT<br>0 i 5 tt 10 tt ty 15 20<br>(0.20) (0.39) (0.59) (0.79)<br>Sensing distance in mm (inch)<br>Relative sensitivity in %<br>**----- End of picture text -----**<br>


## Recommended accessories 

Other models and accessories www.sick.com/KTM 

|a|**Brief description**|**Type**|**Part no.**|
|---|---|---|---|
|Device protection (mechanical)||||
|~~a~~|Stainless steel 1.4301 (SVS 304), 3 mm thick protective sleeve for G6, stainless steel<br>1.4301, mounting hardware included<br>~~a~~|BEF-SG-G6-01|2069044<br>~~=~~|
|Plug connectors and cables||||
|~~*~~|• **Connection type head A:**Female connector, M8, 4-pin, straight, A-coded<br>• **Connection type head B:**Flying leads<br>• **Signal type:**Sensor/actuator cable<br>• **Cable:**5 m, 4-wire, PVC<br>• **Description:**Sensor/actuator cable, unshielded<br>• **Application:**Zones with chemicals<br>~~*~~|YF8U14-<br>050VA3XLEAX<br>~~*~~|2095889<br>~~*i~~|
|~~~~~|• **Connection type head A:**Female connector, M8, 4-pin, straight, A-coded<br>• **Connection type head B:**Male connector, M12, 4-pin, straight, A-coded<br>• **Signal type:**Sensor/actuator cable<br>• **Cable:**5 m, 4-wire, PVC<br>• **Description:**Sensor/actuator cable, unshielded<br>• **Application:**Zones with chemicals<br><br>~~~~~|YF8U14-<br>050VA3M2A14<br><br>~~~~~|2096609<br>~~i~~<br>~~~~~_|



**6 CONTRAST SENSORS | SICK** 

**Product data sheet | 2024-04-15 09:25:50 Subject to change without notice** 

## 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 March 31, 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.

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