Sick WT2S-N161 Photoelectric Proximity Sensor NPN 10-30V DC 55mm Range IP67 IP69K 2m Cable

Sick WT2S-N161 Energetic Sensor

The Sick WT2S-N161 is a rectangular photoelectric proximity sensor that uses an energetic detection principle with a visible red PinPoint LED. It operates on a 10 V DC to 30 V DC supply and provides an NPN light-switching output rated at 50 mA maximum. The housing measures 7.6 mm by 25.1 mm by 12.5 mm and weighs 18 g. A 2 m PVC cable with three wires and a 2.4 mm diameter handles the connection.

Suits Compact 10-30V DC Sensing

This sensor suits applications that need a small rectangular housing with IP67 and IP69K sealing for wash-down environments. The 1 mm to 55 mm sensing range and 800 Hz switching frequency support fast, short-range detection on conveyors or packaging lines. Buyers who need adjustable sensitivity, background suppression, or a longer sensing distance should look at other models. The fixed light-switching mode also limits use where dark-switching logic is required.

Simple Three-Wire Cable Mounting

Installation is straightforward: route the 2 m PVC cable to the controller and connect the three wires for power, ground, and NPN output. The plastic ABS housing and PMMA optics mount with standard brackets for the 7.6 mm by 25.1 mm footprint. Common issues include exceeding the 50 mA output rating, wiring the NPN output to a PNP input, or routing the cable inside tight radii that stress the 2.4 mm jacket. Ensure the supply ripple stays within 5 Vpp for reliable operation.