SICK WTB250-2P2451 Photoelectric Proximity Sensor, 1 m, PNP
SICK W250-2 photoelectric proximity sensor, background suppression, PNP, 1 m sensing range, 3 ms response, M12 4-pin, IP67.
Specifications
| Parameter | Value |
|---|---|
| Series | W250-2 |
| Sensor type | Photoelectric Proximity Sensor, Background Suppression |
| Parameter | Value |
|---|---|
| Sensing distance, max. | 1 m |
| Sensing distance, min. | 200 mm |
| Response time | 3 ms |
| Light type | LED, Visible Red Light |
| Parameter | Value |
|---|---|
| Operating voltage, min. | 10 V |
| Operating voltage, max. | 30 V |
| Parameter | Value |
|---|---|
| Output type | PNP |
| Load current | 100 mA |
| Switching type | Light-ON / Dark-ON |
| Parameter | Value |
|---|---|
| Termination type | Connector, M12, 4-Pin |
| Parameter | Value |
|---|---|
| Protection rating (IP) | IP67 |
| Operating temperature, min. | -25 °C |
| Operating temperature, max. | 55 °C |
| Parameter | Value |
|---|---|
| Length | 43.9 mm |
| Width | 20 mm |
| Height | 65 mm |
Product details
Frequently asked questions
What is the width of the WTB250-2P2451?
The housing width is 20 mm.
What is the height of the WTB250-2P2451?
The housing height is 65 mm.
Will the WTB250-2P2451 drop into a panel specified around the WTB9L-3P2461 without rewiring?
No. The WTB9L-3P2461 uses a 12.2 mm wide housing and a different mounting footprint, while the WTB250-2P2451 is 20 mm wide. Both use M12 4-pin connectors, so the cable may fit, but the mechanical mounting and optical performance (LED vs. laser, range) are different.
Sensor overview and key ratings
The SICK WTB250-2P2451 is a photoelectric proximity sensor with background suppression from the W250-2 series. It uses a visible red LED light source and provides a PNP switching output, configurable for light-ON or dark-ON operation. The sensing range is rated from 200 mm minimum to 1 m maximum, which means it can reliably detect objects at distances up to one meter while ignoring background surfaces beyond that point — useful for conveyor presence detection or part-in-place verification where the background is a fixed surface. Response time is 3 ms, suitable for moderate-speed lines; for faster applications (sub-millisecond), a laser-based sensor like the WTB9L-3P2461 would be a better fit.
Electrical and mechanical fit
Operating voltage range is 10 V to 30 V, which covers standard 24 VDC control systems. The PNP output sinks up to 100 mA — enough to drive a PLC input directly or a small relay. Termination is via an M12 4-pin connector, a common industrial interface. The 20 mm wide housing fits standard DIN-rail mounting profiles; overall dimensions are 20 mm wide, 65 mm tall, and 43.9 mm deep.