Home › Manufacturers › Allen Bradley › 871P-B20N40-N3

Allen Bradley

Allen Bradley 871P-B20N40-N3 Inductive Proximity Sensor

Allen Bradley 871P-B20N40-N3 20mm inductive proximity sensor.

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerAllen Bradley

Part number871P-B20N40-N3

Sensing Range 40 mm

Output NPN

Function Normally Closed (NC)

Circuit Type DC 3-wire

Get a price for 871P-B20N40-N3

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

40mm sensing range NPN Normally Closed output Compact 20mm housing Stainless steel construction Extended detection capability LED output indicator

Product description

The Allen Bradley 871P-B20N40-N3 is a 20mm cylindrical inductive proximity sensor designed for extended sensing capabilities. It features a 40mm sensing range and provides a DC 3-wire normally closed (NC) NPN output. The sensor is housed in a durable stainless steel body with a PBT plastic sensing face, engineered for robust performance in industrial environments.

This sensor is ideal for applications requiring a longer detection range from a smaller housing, such as in tight spaces or for detecting metallic objects at a distance. It is used in various automation scenarios within manufacturing, material handling, and packaging industries.

Stanlo Automation, a veteran-owned provider of surplus industrial automation components, offers the 871P-B20N40-N3. Choosing Stanlo means acquiring reliable, cost-effective parts to ensure your automation systems continue to operate efficiently. We are dedicated to supporting your MRO needs with quality surplus components.

Technical specifications

Sensing Range	40 mm
Output	NPN
Function	Normally Closed (NC)
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	M12 Connector

Common applications

Material handling

Automated assembly

Robotics

Packaging machinery

Machine tools

Conveyor control

Industrial automation

Compatible systems

Allen Bradley ControlLogix Allen Bradley SLC 500 Allen Bradley MicroLogix

Also known as

871P-B20N40N3 Allen Bradley 40mm sensing range sensor 20mm DC NC proximity

Replaces / compatible with

This 20mm sensor with extended 40mm sensing is designed to replace or upgrade similar DC 3-wire inductive proximity sensors in automation systems.

Technical note

Expert tip

The extended sensing range in a standard 20mm housing allows for greater flexibility in machine design and object detection without requiring a larger sensor body.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What are the key features of the Allen Bradley 871P-B20N40-N3?

The Allen Bradley 871P-B20N40-N3 features a 40mm sensing range within a compact 20mm stainless steel housing. It provides a DC 3-wire NPN Normally Closed output, indicated by an LED and connected via an M12 connector.