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Allen Bradley

Allen Bradley 871L-D20EP40-T3 Inductive Proximity Sensor

Allen Bradley 871L-D20EP40-T3 20mm inductive proximity sensor.

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ManufacturerAllen Bradley

Part number871L-D20EP40-T3

Sensing Range 20 mm

Output NPN

Function Normally Open (NO)

Circuit Type DC 3-wire

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Veteran-owned

CAGE: 9NK75

20mm sensing range NPN Normally Open output Stainless steel housing Terminal block connection LED output indicator High reliability

Product description

The Allen Bradley 871L-D20EP40-T3 is a 20mm cylindrical inductive proximity sensor designed for detecting metallic objects. It offers a 20mm sensing range and operates on a DC 3-wire normally open (NO) circuit, providing a reliable NPN output. The sensor is constructed with a durable stainless steel housing and a PBT plastic sensing face.

This sensor is ideal for applications requiring reliable object detection, such as end-of-travel sensing, part presence checks, and proximity detection in automated machinery. It is widely employed in industries like automotive, aerospace, and packaging where consistent performance is critical.

Stanlo Automation, a veteran-owned supplier, specializes in surplus industrial automation components. Choosing Stanlo for your 871L-D20EP40-T3 needs means access to cost-effective, quality parts. We are committed to supporting your automation projects with dependable surplus solutions.

Technical specifications

Sensing Range	20 mm
Output	NPN
Function	Normally Open (NO)
Circuit Type	DC 3-wire
Housing Style	Cylindrical
Body Diameter	20 mm
Housing Material	Stainless Steel
Face Material	PBT Plastic
Output Indicator	LED
Connection Type	Terminal Block

Common applications

Automated assembly

Robotics

Conveyor control

Packaging machines

Machine tools

Material detection

Metal fabrication

Compatible systems

Allen Bradley SLC 500 Allen Bradley MicroLogix Allen Bradley PanelView terminals

Also known as

871L-D20EP40T3 Allen Bradley 871L NO sensor 20mm DC NO proximity switch

Replaces / compatible with

This sensor is part of the Allen Bradley 871L series, suitable for replacing older or similar 20mm DC 3-wire proximity sensors in automated systems.

Technical note

Expert tip

The terminal block connection offers flexibility for wiring in control panels, but ensure proper insulation and strain relief for long-term reliability.

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Frequently asked questions

What are the key specifications for the Allen Bradley 871L-D20EP40-T3 sensor?

The 871L-D20EP40-T3 is a 20mm stainless steel inductive proximity sensor with a 20mm sensing range. It provides an NPN Normally Open (NO) output via a DC 3-wire connection with terminal block termination.