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Small rectangular plastic sensor with red LED and short M8 cable

Sick

Sick WTB4-3P3162 Miniature Photoelectric Sensor PNP

SKU CH-PY97-8MV2G

Miniature photoelectric sensor with background suppression detects small objects at 15–150 mm using a visible red PinPoint LED and PNP output

  • Detects small objects with background suppression photoelectric sensing
  • Sensing range 15 mm to 150 mm with visible red PinPoint LED
  • Fast 0.5 ms response time at 1 000 Hz switching frequency
  • Compact 16 mm x 39.5 mm x 12 mm ABS housing rated IP67 and IP66
  • Operates from –40 °C to +60 °C on 10 V to 30 V DC supply

Sick WTB4-3P3162 Miniature Photoelectric Sensor

The Sick WTB4-3P3162 is a miniature photoelectric proximity sensor with background suppression. It operates on 10 V DC to 30 V DC supply voltage and provides a PNP switching output. The sensor suits industrial automation tasks that require reliable object detection in a compact 16 mm x 39.5 mm x 12 mm housing.

M8 Cable Connection with PVC Jacket

The sensor includes a 100 mm cable with a 3-pin M8 connector and PVC jacket. This pre-wired connection simplifies installation in control cabinets or on machine frames. The cable uses a 0.14 mm² conductor cross-section and 3.4 mm diameter for flexible routing.

15 mm to 150 mm Sensing Range with PinPoint LED

A visible red PinPoint LED at 650 nm wavelength creates a 7 mm light spot at 50 mm distance. The sensing range spans 15 mm to 150 mm with background suppression for precise detection of small objects. Response time stays below 0.5 ms at 1,000 Hz switching frequency. IP67 and IP66 ratings protect against dust and water ingress. Operating temperature covers –40 °C to +60 °C. Buyers needing longer sensing distances or analog output should consider other sensor types.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $142.99
Pricier than about 66% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK WTB4-3P3162

Questions about this item

Will the PinPoint LED or the M8 cable need replacing after extended use?

The sensor uses a PinPoint LED light source rated for long life; the 100 mm PVC cable with M8 connector is fixed and not user-replaceable.

What limits continuous detection at the 150 mm range?

Background suppression is set via a single teach-in button; the 1,000 Hz switching frequency and <0.5 ms response time define the maximum sustained detection speed.

How much heat does the unit generate when powered all day at 30 V DC?

Power consumption stays at 20 mA across the 10–30 V DC range; the IP67-rated ABS housing dissipates this low power without active cooling.

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