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Rectangular fiber-optic photoelectric sensor with 2 m PVC cable

Sick

SICK WLL190T-2N432 Fiber-optic Photoelectric Sensor NPN

SKU CH-VHNG-QTNH6

Fiber-optic photoelectric sensor with NPN output, visible red LED and 10.5 mm x 34.8 mm x 76.5 mm housing

  • Fiber-optic sensing up to 4 m with through-beam system
  • Visible red LED at 650 nm for clear detection
  • NPN switching output handles up to 100 mA load current
  • Fast response from 60 µs for high-speed applications
  • Compact 10.5 × 34.8 × 76.5 mm housing fits tight spaces

Industrial Fiber-optic Sensor NPN

The SICK WLL190T-2N432 is a stand-alone fiber-optic photoelectric sensor designed for industrial automation and machine-building applications. It uses visible red LED light at 650 nm with an approximate 65° dispersion angle to detect objects in through-beam or proximity configurations. The rectangular housing measures 10.5 mm by 34.8 mm by 76.5 mm and includes a 2-metre PVC cable with four wires for integration into control systems. Operators configure settings via a single teach-in button and a menu-driven interface.

Supply Voltage and Switching Limits

The sensor operates on a DC supply between 10 V and 24 V with a maximum ripple of 10 % and a power consumption of 50 mA. Its NPN switching output supports light or dark switching modes selected manually, delivering a maximum output current of 100 mA. Programmable time functions include off delay, on delay and one-shot modes with a delay range up to 9,999 ms. Response times vary between 60 µs and 2 ms depending on the selected switching frequency of 250 Hz, 2,000 Hz or 8,333 Hz.

Sensing Range Determines Fit

Through-beam operation with the appropriate fibre reaches up to 4 m while proximity sensing covers 0 mm to 480 mm. Buyers needing longer proximity detection or a PNP output type will find this model unsuitable for those requirements. The fixed 2-metre cable length may also limit installation flexibility in larger machinery layouts.

Highlights

  • Fiber-optic sensing up to 4 m with through-beam system
  • Visible red LED at 650 nm for clear detection
  • NPN switching output handles up to 100 mA load current
  • Fast response from 60 µs for high-speed applications
  • Compact 10.5 × 34.8 × 76.5 mm housing fits tight spaces

Specifications

BrandSICK
ModelSICK WLL190T-2N432

Questions about this item

Which sensing range version suits my application: the 480 mm proximity or the 4 m through-beam?

Choose the 480 mm proximity range for detecting objects directly in front of the sensor, or the 4 m through-beam range when a separate receiver can be mounted opposite the emitter.

What does the 2 ms response time mean on a production line?

The sensor can detect a change and switch its output within 2 ms, allowing reliable detection of objects moving at high speed on conveyors.

How does the NPN output work with a 24 V PLC input?

The NPN switching output sinks up to 100 mA from a 24 V DC supply, compatible with standard PLC sinking input modules.

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