Overview
The Allen-Bradley 873P-D18P1-2200-D4 ultrasonic proximity sensor delivers long-range detection in a compact plastic barrel design. This 18mm diameter sensor offers a sensing distance from 200mm to 2200mm with a 4-pin micro Quick Disconnect DC electrical connection. The sensor features programmable output configuration, making it suitable for diverse industrial automation and process control applications.
Key Features
- PNP discrete output with NO/NC pushbutton programmability
- 18mm plastic threaded barrel construction for durability in harsh environments
- Extended 2200mm (86.61 inch) maximum sensing range for long-distance object detection
- Micro QD 4-pin DC connector for quick, tool-free connection
- 15–30V DC operating voltage for standard industrial power supplies
Technical Specifications
The following specifications define the operational and physical characteristics of this ultrasonic proximity sensor:
Typical Applications
- Material level detection in bins, hoppers, and storage tanks
- Object proximity sensing on conveyor systems and automation lines
- Distance measurement for positioning and alignment in packaging and assembly equipment
- Flood detection and tank overfill protection
- Mobile equipment and material handling proximity sensing
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix, ControlLogix, and MicroLogix PLC controllers via discrete I/O modules
- Third-party industrial PLCs and motion controllers with 15–30V DC input capability
- Standard 24V DC and 15V DC industrial control systems
- PNP-input proximity modules and digital input cards
Replaces / Drop-In Replacement For
The 873P-D18P1-2200-D4 is a direct replacement for OEM applications specifying the exact part number. Verify compatibility with your system integrator before ordering to ensure proper input module configuration and wiring polarity.
Works With
- Studio 5000 and RSLogix software for discrete I/O programming
- PNP discrete input modules in CompactLogix and ControlLogix chassis
- Standard industrial 24V DC wiring and sensor networks
- Any PLC or controller with standard PNP-input capability




