Sick
Sick WTB4-3N3171 Miniature Photoelectric Sensor NPN 15-150mm 10-30V DC M8 3-pin
Miniature photoelectric sensor with background suppression, 15-150 mm range, NPN output, 10-30 V DC, M8 3-pin connector, IP67/IP66 rated
- Miniature 16 mm x 39.5 mm housing fits tight spaces
- Background suppression ignores surfaces beyond 150 mm range
- PinPoint LED gives visible red 650 nm light spot
- NPN light-switching output responds in under 0.5 ms
- IP67 and IP66 rated for harsh environments
Miniature Photoelectric Sensor NPN
The SICK WTB4-3N3171 is a compact rectangular photoelectric proximity sensor that uses background suppression to detect objects between 15 mm and 150 mm. It operates on a 10 V DC to 30 V DC supply and provides an NPN light-switching output with a maximum current of 100 mA. The housing measures 16 mm by 39.5 mm by 12 mm and weighs 30 g.
Sustained operation in industrial environments
The sensor is rated IP67 and IP66, protecting the internal PinPoint LED and electronics against dust ingress and powerful water jets during continuous duty. An ABS plastic housing and PMMA optics withstand ambient temperatures from –40 °C to +60 °C without performance loss. Circuit protection guards against supply polarity reversal, short circuits and overloads while the unit draws only 20 mA.
5-turn potentiometer for precise range setting
A 5-turn mechanical potentiometer lets the installer fine-tune the sensing distance within the 15 mm to 150 mm window to match the exact application. The visible red light spot measures 5 mm by 28 mm at 50 mm distance, enabling reliable detection of small or perforated objects. Connection is made via a 100 mm PVC cable terminated with an M8 3-pin connector.
Highlights
- Miniature 16 mm x 39.5 mm housing fits tight spaces
- Background suppression ignores surfaces beyond 150 mm range
- PinPoint LED gives visible red 650 nm light spot
- NPN light-switching output responds in under 0.5 ms
- IP67 and IP66 rated for harsh environments
Specifications
| Brand | SICK |
|---|---|
| Model | SICK WTB4-3N3171 |
Questions about this item
How much power does the WTB4-3N3171 consume during continuous operation on a 10-30V DC supply?
Power consumption is 20 mA at the supply voltage, with ripple below 5 Vpp.
What must the buyer provide for the WTB4-3N3171 to operate?
A 10-30V DC power source and an M8 3-pin mating connector for the 100 mm cable.
Will the WTB4-3N3171 fit existing M8 3-pin sensor mounts and wiring?
Yes, it uses an M8 3-pin connector on a 100 mm PVC cable with 0.14 mm² conductors and 3.4 mm diameter.
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