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Allen Bradley

Allen Bradley 871T-N4 Inductive Proximity Sensor

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ManufacturerAllen Bradley

Part number871T-N4

Sensing Technology Inductive

Output Type NPN

Configuration Normally Open (NO)

Sensing Range 4mm

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Veteran-owned

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Non-contact metallic object detection NPN NO output 12mm threaded metal body 2-meter integral cable 4mm sensing range Durable construction

Product description

The Allen Bradley 871T-N4 is a cylindrical inductive proximity sensor with a 12mm threaded metal body. It operates with an NPN output configuration, providing a Normally Open (NO) contact for detecting metallic objects. This sensor is designed for robust, non-contact detection in industrial automation environments.

This sensor is widely used in applications where NPN output logic is preferred or required by the control system. Typical uses include part detection on conveyors, positioning checks in assembly machines, and level sensing in material handling equipment across various manufacturing sectors.

Stanlo Automation, a veteran-owned company specializing in surplus industrial automation parts, offers the Allen Bradley 871T-N4. We provide cost-effective solutions for acquiring reliable components to keep your operations running smoothly.

Technical specifications

Sensing Technology	Inductive
Output Type	NPN
Configuration	Normally Open (NO)
Sensing Range	4mm
Cable Length	2m
Body Style	Cylindrical
Diameter	12mm
Voltage	10-30V DC

Common applications

Part Presence Detection

Machine Automation

Material Handling

Conveyor Systems

Assembly Lines

Packaging Equipment

Compatible systems

Standard DC I/O Modules PLC Input Modules Automation Controllers

Also known as

871T-N4 AB sensor, Allen Bradley 871T NPN, 12mm NPN sensor

Replaces / compatible with

The 871T-N4 is a standard NPN output inductive proximity sensor from the Allen Bradley 871T series, designed for general industrial detection tasks.

Technical note

Expert tip

This sensor requires a sinking type input module or PLC as it uses NPN output logic.

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Frequently asked questions

What is the output type and sensing range of the Allen Bradley 871T-N4 sensor?

The Allen Bradley 871T-N4 features an NPN output that is Normally Open (NO) and has a sensing range of 4mm for metallic objects. It operates within a 10-30V DC voltage range.