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Red cylindrical proximity switch M12 thread 37 mm length cable connection

Wenglor

Wenglor IB040BM37TB proximity switch electrician tool

SKU CH-6J57-TPW6X MPN IB040BM37TB

NPN proximity switch with 4 mm flush range, 37 mm housing and 2 m cable output

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • NPN output simplifies PLC wiring
  • 4 mm sensing range detects close targets
  • Flush mounting sits level with surface
  • 37 mm housing fits tight spaces
  • 2 m cable reaches panels without joins

Proximity Switch for Industrial Sensing

The Wenglor IB040BM37TB is an inductive proximity switch built for electricians and automation technicians who need reliable presence detection in machinery or conveyor systems. Its flush-mount design suits installations where the sensor face must sit level with surrounding metal. The NPN normally-open output integrates directly into standard PLC input modules. Supplied new in a single-unit box.

4 mm Sensing Range Decides Fit

The critical specification is the 4 mm operating distance, which determines whether the switch will reliably detect the target material at the required gap. A shorter or longer range would cause missed triggers or false actuations in the same mounting geometry. Verify the 4 mm figure against your application before purchase.

Low Heat and Silent Operation

As a solid-state inductive sensor, the unit generates negligible heat during normal switching cycles and produces no audible noise. Power draw is limited to the few milliamps required by the NPN output stage and indicator LED. The 2 m three-wire cable carries both supply and signal without additional connectors.

How it compares

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

Price $79.99
Cheaper than about 61% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameWenglor
Model nameIB040BM37 TB
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What does the 4 mm sensing range mean when the switch is installed in a machine?

The switch will detect a metal target reliably up to 4 mm away from the sensing face when mounted flush in the application.

How does the NPN normally-open output behave in a control circuit?

The output pulls the signal line low only when a target is present within the 4 mm range, otherwise it stays high-impedance.

What clearance and mounting hardware does the M12 threaded housing need?

The sensor requires an M12 clearance hole and nuts; its 37 mm threaded body seats flush with the mounting surface.

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