Sick
Sick WT12L-2B550 Photoelectric Sensor NPN PNP
Compact photoelectric proximity sensor with background suppression, laser class 2 red light, 10–30 V DC supply, selectable NPN or PNP output, IP67 and IP69K rated metal housing
- Detects tiny objects with 0.2 mm laser spot at 100 mm
- Background suppression ignores surroundings for reliable sensing up to 200 mm
- IP67 and IP69K metal housing withstands wash-down and immersion
- Selectable PNP or NPN output suits diverse control systems
- 5 kHz switching frequency captures high-speed motion accurately
Compact Laser Photoelectric Sensor
The Sick WT12L-2B550 is a rectangular photoelectric proximity sensor with background suppression designed for detecting small objects and objects moving at high speeds. It uses a visible red laser light source with a wavelength of 650 nm and a spot size of Ø 0.2 mm at a 100 mm focus distance. The sensor operates on a supply voltage of 10 V DC to 30 V DC and offers selectable light or dark switching via an L/D control cable.
Suited For Precision Automation Tasks
This sensor suits applications requiring accurate detection of small parts or fast-moving targets within a 30 mm to 200 mm range, such as packaging lines or assembly equipment. Its IP67 and IP69K enclosure ratings support use in harsh wash-down environments. Buyers needing longer sensing distances, analogue output, or IO-Link communication should look at alternative sensor models.
Sensing Range And Output Headroom
The device comfortably handles detection tasks up to a maximum sensing range of 200 mm with a response time of 200 µs and a switching frequency of 2,500 Hz. It provides both PNP and NPN switching outputs with a maximum output current of 100 mA. The laser classification is Class 2 per EN 60825-1:2014 and IEC 60825-1:2007, and the metal housing weighs 130 g including two supplied mounting clamps.
Highlights
- Detects tiny objects with 0.2 mm laser spot at 100 mm
- Background suppression ignores surroundings for reliable sensing up to 200 mm
- IP67 and IP69K metal housing withstands wash-down and immersion
- Selectable PNP or NPN output suits diverse control systems
- 5 kHz switching frequency captures high-speed motion accurately
Specifications
| Brand | SICK |
|---|---|
| Model | SICK WT12L-2B550 |
Questions about this item
What supply voltage must my system provide for the WT12L-2B550 sensor?
The sensor operates on 10 V DC to 30 V DC with a maximum ripple of 5 Vpp and draws up to 55 mA.
Can the WT12L-2B550 connect to a legacy PLC that only accepts NPN outputs?
Yes, the sensor provides both NPN and PNP switching outputs selectable via the L/D control cable, each rated for 100 mA.
How do I verify the laser alignment after mounting the WT12L-2B550?
The visible red laser (650 nm, Class 2) produces a 0.2 mm spot at 100 mm; confirm the spot hits the target and the output toggles at the 2.5 kHz switching frequency.
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