871TM-DR5NE18-H2

Overview of Allen Bradley 871TM-DR5NE18-H2

The Allen Bradley 871TM-DR5NE18-H2 is a 2-wire intrinsically safe inductive proximity sensor designed for hazardous environment detection and control. This 18 mm barrel-diameter sensor offers a 5 mm sensing distance and operates on 10 to 31.5 VDC input voltage, drawing between 2 and 25 mA load current. Built for Zone 0, Zone 1, and Zone 2 hazardous locations, this sensor provides reliable non-contact object detection in explosive atmospheres where safety certification is mandatory. The H2 suffix indicates a 2-meter ToughLink cable connection, engineered for industrial durability and resistance to oil, chemicals, and physical stress. As part of the 871TM series, this sensor has been discontinued by Rockwell Automation, with the 871C-DH5M18-D4 NAMUR sensor serving as the recommended replacement offering enhanced performance and Zone 2 certification. The 871TM-DR5NE18-H2 remains widely available through industrial automation suppliers and continues to serve in existing installations across manufacturing, process control, and hazardous area applications.

Key Features of Allen Bradley 871TM-DR5NE18-H2

• Intrinsically Safe Design: Certified for use in explosive atmospheres with Zone 0/1/2 ratings
• 5 mm Sensing Range: Precise detection distance for close-proximity applications
• 18 mm Barrel Diameter: Standard M18 threading for universal mounting compatibility
• 2-Wire Configuration: Simplified wiring with integrated power and signal on two conductors
• ToughLink Cable: 2-meter 18 AWG cable provides enhanced durability in harsh industrial environments
• Wide Voltage Range: Operates across 10 to 31.5 VDC for flexible system integration
• Low Current Draw: 2 to 25 mA load current minimizes power consumption

Technical Specs of 871TM-DR5NE18-H2

Model Number	871TM-DR5NE18-H2
Sensor Type	Inductive Proximity, Intrinsically Safe
Sensing Distance	5 mm
Housing Diameter	18 mm
Input Voltage	10 - 31.5 VDC
Load Current	2 - 25 mA
Wire Configuration	2-wire
Cable Type	2 m ToughLink cable (18 AWG)
Output Type	Normally open/closed (configurable)
Hazardous Location Rating	Intrinsically Safe (Zone 0/1/2)

Applications / Use Case

The Allen Bradley 871TM-DR5NE18-H2 serves critical detection functions in hazardous manufacturing environments where explosive gases, vapors, or dust present safety risks. Oil and gas facilities utilize this sensor for valve position monitoring, pipeline equipment detection, and process control in classified areas. Chemical processing plants deploy the 871TM-DR5NE18-H2 for reactor vessel monitoring, mixing equipment control, and automated batch processing where intrinsic safety certification is required. Pharmaceutical manufacturing operations rely on this sensor for sterile environment detection, filling line control, and packaging automation in explosive solvent atmospheres. Mining operations use the sensor for conveyor monitoring, material handling detection, and crusher equipment control in coal dust environments. Paint and coating facilities implement this proximity sensor for spray booth automation, conveyor tracking, and robotic application systems where flammable vapor concentrations demand intrinsically safe components. The 2-wire design simplifies installation in legacy control panels, while the ToughLink cable withstands exposure to hydraulic fluids, cutting oils, and harsh cleaning agents common in heavy industrial settings.

Related Resources

• LeadTime.ca – Industrial Automation Components & Repair Services
• View All Allen Bradley Products
• Examples of Industrial Automation and Control Systems
• Allen Bradley 1756-EN2TR EtherNet/IP Module
• Allen Bradley 5094-IB16 Flex 5000 Input Module