Overview
The Allen-Bradley 871TM-B8N18-N3 is a compact, 18mm inductive proximity sensor designed for precise metallic object detection in industrial automation applications. This stainless steel, 2-wire sensor operates at 20–250V AC/DC with an 8mm sensing distance and normally open output, making it suitable for both compact and corrosive environments. The sensor features Mini QD connection and non-shielded design for flexible mounting and straightforward integration into control systems.
Key Features
- Stainless Steel Housing: Corrosion-resistant construction for food processing, beverage, chemical, and marine applications
- 8mm Sensing Distance: Adequate detection range for standard industrial metallic target sensing
- Wide Input Voltage: Accepts 20–250V AC/DC, eliminating the need for separate supply modules
- Normally Open Output: Standard switching output for PLC and relay integration
- 2-Wire AC/DC Configuration: Simplified wiring with positive and negative leads plus shield
- Mini QD Connector: Quick-disconnect interface for rapid sensor replacement and maintenance
Technical Specifications
- Sensing Distance: 8mm maximum
- Housing Material: Stainless Steel
- Sensor Diameter: 18mm tubular
- Input Voltage: 20–250V AC/DC
- Output Type: Normally Open
- Connection Type: Mini QD Connection
- Sensing Type: Non-shielded
- Series: 871TM Series A
- Catalog Number: 871TM-B8N18-N3
- UPC: 662073893134
Typical Applications
- Bottling and filling line position detection
- Conveyor belt presence sensing
- Metallic parts sorting and identification
- Machine tool limit switching
- Workpiece arrival and departure indication
- Hygiene-critical food and beverage processing
- Harsh chemical and corrosive environments
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix, ControlLogix, and MicroLogix PLC inputs
- Rockwell Automation industrial automation systems
- Standard 24VDC/120VAC control circuits
- Relay and contactor control circuits
- Variable frequency drives (VFD) and servo control systems
Replaces / Drop-In Replacement For
- Verify compatibility with your specific control system configuration before ordering
- Similar stainless steel 18mm inductive sensors from competing manufacturers may require recalibration
Works With
- Studio 5000 Automation Engineering and Design Software
- Allen-Bradley control and monitoring systems
- Standard PLC digital input modules rated for 24VDC or AC switching inputs
- NEMA enclosures for non-hazardous locations
