Overview
The Allen-Bradley 871TM-BH5N18-R3 is a tubular stainless steel inductive proximity sensor designed for reliable detection of ferromagnetic objects in demanding industrial environments. With its rugged 18 mm metal barrel housing and a plug-in AC Micro Quick Disconnect connector for easy installation, this sensor delivers both durability and ease of integration. The 871TM series is ideal for harsh or extremely demanding environments, resisting impact, abrasion and corrosion.
Key Features
- 2-wire AC/DC operation with a 5 mm sensing range for accurate and reliable object detection
- Full mechanical seals at all barrel openings and full epoxy encapsulation for optimal performance in the toughest environments
- Normally open output supporting both AC and DC operation up to 250V
- Certified by UL, CE, C-TICK, KC and global standards for safety and reliability
- Shielded design for reliable operation in electrically noisy environments
- Metal face construction for enhanced durability
Technical Specifications
- Housing Diameter: 18 mm (M18)
- Sensing Distance: 5 mm
- Supply Voltage: 20–250 Volt AC/DC
- Maximum Load Current: 25 mA
- Operating Frequency: 65 Hz
- Output Type: Normally Open (N.O.)
- Connector: Micro QD (AC) Quick Disconnect
- Housing Material: Stainless Steel
- Shielding: Yes
- Wiring: 2-Wire
Typical Applications
The 871TM-BH5N18-R3 is widely used in:
- Packaging and material handling systems requiring ferromagnetic object detection
- Position sensing in conveyor systems and assembly lines
- Production environments with washdown, chemical exposure, or corrosive atmospheres
- Automated machinery requiring compact, reliable proximity sensing
- Food and beverage processing where stainless steel construction is essential
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix PLCs via standard 24 VDC input modules
- Siemens S7-1200, S7-1500, and S5 series controllers
- Mitsubishi FX and Q-series PLCs
- Omron CP/CJ and NX series programmable controllers
- Standard industrial control systems accepting 20–250V AC/DC two-wire sensors
- IO-Link capable control systems (select 871TM models with IO-Link certification)
Replaces / Drop-In Replacement For
- 871TM-BH5N18-N3 (functionally equivalent with different series certification)
- Legacy inductive proximity sensors in 18mm M18 form factor with 5mm sensing distance
Works With
- Allen-Bradley Studio 5000 and RSLogix software environments
- Siemens TIA Portal and STEP 7 software
- EtherNet/IP and PROFINET industrial Ethernet networks (via compatible gateways)
- Standard 24 VDC PLC input modules and relay logic circuits
- IO-Link communication protocol (on IO-Link enabled 871TM models)
