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Red rectangular area sensor with twelve infrared lenses spaced twenty millimetres apart

Autonics Corp

Autonics Corp BW20-12 Area Sensor NPN 12 Axes 20mm Pitch 7m Range

SKU CH-CV01-KARHB MPN BW20-12

Through-beam area sensor with 12 infrared axes on 20 mm pitch, sensing 0.1 to 7 m and switching NPN open-collector on 12-24 VDC

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • 12 optical axes form a detection curtain
  • 1 to 7 m sensing range covers wide areas
  • 20 mm optical axis pitch for fine resolution
  • NPN open collector output suits PLC inputs
  • Infrared 850 nm LED source resists ambient light

Sensing range and axis count

The Autonics BW20-12 is a through-beam area sensor with twelve optical axes spaced at a 20 mm pitch. It detects objects across a sensing distance of 0.1 to 7 m using an 850 nm infrared LED. The unit operates on a 12 to 24 VDC supply and provides an NPN open-collector output in Light ON mode.

Ideal applications and limits

This sensor suits automation tasks that require multiple parallel detection points over a medium range, such as conveyor monitoring or parts counting. It is not suited for applications needing a single narrow beam, a different output logic, or a supply voltage outside the stated 12 to 24 VDC window.

Decisive specification

The NPN open-collector control output determines compatibility with the controller input circuit; verify that the PLC or logic module accepts this sinking signal type before purchasing.

How it compares

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

Price $130.99
Pricier than about 62% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameAutonics
Model nameBW20-12
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What is the optical axis pitch and how many axes does the BW20-12 have?

The sensor has 12 optical axes spaced at a 20mm pitch, creating a detection curtain suited for object presence checks.

How do I wire the NPN open collector output to a 12-24VDC supply?

Connect the load between the output wire and the positive supply rail; the sensor sinks current when the beam is unbroken in Light ON mode.

Which component degrades first and how often should it be checked?

The infrared LED at 850nm wavelength is the primary wear item; verify sensing distance against the 0.1 to 7m range during routine inspections.

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