WTF12-3P2441

What type of sensor is this?

It is a photoelectric proximity (diffuse) sensor with foreground suppression, designed to detect objects directly without a separate reflector.

What does foreground suppression mean in practical terms?

Foreground suppression helps the sensor ignore background surfaces beyond the set sensing window, improving detection reliability when there is a fixed background behind the target.

What sensing distance can I expect?

The adjustable sensing range is 30 mm to 500 mm. Actual usable distance depends on the target’s reflectivity, surface finish, angle, and ambient conditions.

How does target colour or reflectivity affect sensing distance?

Higher-reflectivity targets (for example, white surfaces) can typically be detected at longer distances than low-reflectivity targets (for example, matte black). For best consistency across mixed colours, set the sensing distance with the darkest or least reflective target.

What light does the sensor use, and is it visible?

It uses visible red LED light (640 nm). The light spot is approximately 7 mm in diameter at 300 mm.

How do I adjust the sensing distance?

The sensor has a 5-turn potentiometer for fine adjustment. Set the target at the desired detection point, then adjust until the switching behaviour is stable with your real product and background.

What supply voltage is required?

It operates on 10–30 V DC.

What output does it provide?

It provides PNP transistor outputs with complementary (antivalent) switching behaviour, allowing light-on/dark-on style operation depending on which output is used.

What is the maximum output current?

The maximum output current is 100 mA.

How fast can it switch?

It has a response time of up to 330 µs and a switching frequency up to 1,500 Hz, suitable for many high-speed detection tasks.

What connector and wiring does it use?

It uses a 4-pin M12 male connector. Typical pinning is: Pin 1 (brown) L+, Pin 3 (blue) M (0 V), and two switching outputs on Pins 2 (white) and 4 (black).

What do the onboard LEDs indicate?

A green LED indicates supply voltage is present. A yellow LED indicates the status of received light (useful during alignment and set-up).

What environmental protection rating does it have?

It is rated IP66, IP67, and IP69K, offering strong protection against dust and water ingress for demanding industrial environments.

What are the operating temperature limits?

Ambient operating temperature is -40 °C to +60 °C. Storage temperature is -40 °C to +75 °C.

What is the housing size and material?

It has a compact rectangular metal housing. Dimensions are approximately 15.6 mm (W) x 48.5 mm (H) x 42 mm (D), with a PMMA plastic front screen.

Is any mounting hardware included?

Yes. It is supplied with two clamp brackets (BEF-KH-W12) including screws. The device also features mounting provisions such as an M4 threaded mounting hole (4 mm deep) and a Ø 4.2 mm mounting hole.