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Allen Bradley 871TM-B4N12-N3 Inductive Proximity Sensor, NPN NO

Allen Bradley M12 inductive proximity sensor, 4mm sensing, NPN NO output, AC powered.

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ManufacturerAllen Bradley

Part number871TM-B4N12-N3

Sensing Range 4 mm

Supply Voltage 20-250V AC

Frequency 40-60 Hz

Output NPN NO

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12-month warranty

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Order by 2pm CST

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Veteran-owned

CAGE: 9NK75

Non-contact detection M12 threaded design 4mm sensing range NPN NO output configuration 2-meter cable Robust construction

Product description

The Allen Bradley 871TM-B4N12-N3 is a cylindrical inductive proximity sensor featuring an NPN normally open (NO) output. Designed for non-contact detection of metallic objects, it operates within a 20-250V AC voltage range and a 40-60 Hz frequency. This M12 sensor has a 4mm sensing distance and a standard 2-meter cable, making it a versatile component for various automation tasks.

This proximity sensor is ideal for applications requiring reliable detection of metal targets in environments such as machine tools, conveyor systems, and automated assembly lines. It is commonly employed in the automotive, electronics, and material handling industries.

Stanlo Automation, a veteran-owned surplus parts distributor, provides access to essential industrial components like the Allen Bradley 871TM-B4N12-N3. We are committed to delivering quality surplus parts and expert support to our customers.

Technical specifications

Sensing Range	4 mm
Supply Voltage	20-250V AC
Frequency	40-60 Hz
Output	NPN NO
Connection	2-meter cable
Body Style	Cylindrical M12
Flush Mount	No
Series	871TM

Common applications

Metal object detection

Machine guarding

Part presence verification

Automation control

Conveyor systems

Robotics

Compatible systems

PLCs Control panels Automation circuits

Also known as

871TM-B4N12-N3 switch Allen Bradley M12 NPN sensor 871TM 4mm sensor

Replaces / compatible with

This sensor is designed to replace other Allen Bradley 871TM series sensors with similar specifications and NPN NO output requirements.

Technical note

Expert tip

The NPN NO output configuration requires careful consideration of the load and power supply polarity to ensure correct operation.

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Frequently asked questions

Can the Allen Bradley 871TM-B4N12-N3 sensor be used for detecting non-metallic objects?

No, the 871TM-B4N12-N3 is an inductive proximity sensor and is specifically designed to detect metallic objects only. It works by sensing changes in an electromagnetic field, which are induced by the presence of metal.