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Small rectangular photoelectric sensor, red plastic housing, M12 connector, potentiometer adjustment

Sick

Sick WTB9-3P2461 photoelectric sensor PNP 20-350mm IP69K

SKU CH-9EEZ-W79ZB

Compact photoelectric sensor with background suppression, 20–350 mm range, PNP output and IP69K enclosure

  • Precise detection up to 350 mm with background suppression
  • PinPoint LED gives a 4.5 mm spot at 75 mm distance
  • 1,500 Hz switching frequency for fast response under 0.333 ms
  • IP69K enclosure rating withstands high-pressure washdown at –40 °C to +60 °C
  • Compact 12.2 mm x 52.2 mm x 23.6 mm housing fits tight spaces

Compact photoelectric sensor for short-range

The Sick WTB9-3P2461 is a rectangular photoelectric proximity sensor that uses background suppression to detect objects between 20 mm and 350 mm. It operates on 10 V DC to 30 V DC and weighs 13 g, making it suitable for tight machine spaces where a small footprint is required.

Potentiometer adjustment and PinPoint LED

A 5-turn potentiometer lets the installer set the exact switching point for the application. The PinPoint LED produces a visible red spot of Ø 4.5 mm at 75 mm distance, simplifying alignment during commissioning and reducing setup time on the line.

IP69K enclosure rating for wash-down environments

The housing is rated IP66, IP67 and IP69K, so the sensor withstands high-pressure, high-temperature cleaning cycles common in food and beverage processing. Buyers who need a sensor for dry, low-pressure cabinets only will find this protection level unnecessary.

Highlights

  • Precise detection up to 350 mm with background suppression
  • PinPoint LED gives a 4.5 mm spot at 75 mm distance
  • 1,500 Hz switching frequency for fast response under 0.333 ms
  • IP69K enclosure rating withstands high-pressure washdown at –40 °C to +60 °C
  • Compact 12.2 mm x 52.2 mm x 23.6 mm housing fits tight spaces

Specifications

BrandSICK
ModelSICK WTB9-3P2461

Questions about this item

Will the potentiometer or the PinPoint LED need replacement first on the WTB9-3P2461?

The 5-turn potentiometer adjusts the sensing range; the PinPoint LED at 650 nm has no stated replacement interval.

What limits continuous operation of the WTB9-3P2461 — the 1,500 Hz switching frequency or the 100 mA output current?

The 1,500 Hz switching frequency caps the maximum detection rate; the 100 mA output current limits the load each switching event can drive.

How much heat does the WTB9-3P2461 generate when running all day on a 30 V DC supply?

At 30 mA draw the sensor dissipates under 1 W, and the IP69K-rated plastic housing operates from –40 °C to +60 °C without active cooling.

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