Overview
The Allen-Bradley 873P-D18P1-2200-D4 ultrasonic proximity sensor delivers reliable object detection for demanding industrial automation environments. This 18mm diameter sensor operates in diffuse mode with a maximum sensing range of 2200mm (7.87 to 86.61 inches), making it ideal for detecting materials at extended distances. Built with a plastic threaded barrel and Micro Quick Disconnect 4-pin DC connector, the sensor integrates seamlessly into existing control systems while offering a programmable output stage for flexible configuration.
Key Features
- Long-range ultrasonic detection up to 2200mm sensing distance
- 18mm plastic barrel with M18 threaded mount for compact installations
- PNP discrete output with pushbutton adjustment for sensitive tuning
- Micro Quick Disconnect (QD) 4-pin connector for rapid field replacement
- Diffuse-mode operation ideal for non-metallic material and level sensing
- Programmable configuration to suit diverse application requirements
Technical Specifications
- Sensor Type: Ultrasonic proximity sensor
- Detection Mode: Diffuse (retroreflective not required)
- Sensing Distance: 200mm to 2200mm (7.87 to 86.61 inches)
- Barrel Diameter: 18mm
- Output Type: PNP discrete, 1 channel (NO/NC selectable)
- Electrical Connection: Micro QD, DC 4-pin
- Housing: Plastic threaded barrel with M18 mount
- Supply Voltage: DC (standard industrial range)
- Control Method: Pushbutton with programmable sensitivity
- Mounting: Threaded barrel mount
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Series: 873P Ultrasonic Sensors
- Condition: New in Box
Typical Applications
The 873P-D18P1-2200-D4 is commonly deployed in:
- Level sensing and tank monitoring in non-metallic containers
- Conveyor and packaging line material detection
- Presence detection for quality control and assembly automation
- Distance measurement and gap detection in manufacturing processes
- Plastic, paper, and food product detection without contact
Compatibility & Replacements
Compatible With
- Allen-Bradley ControlLogix and CompactLogix controllers with discrete input modules
- Siemens S7-1200, S7-1500 with analog/digital input cards
- Schneider Electric M241 and Modicon controllers
- Mitsubishi FX and Q-series PLCs with PNP input modules
- Standard industrial DC PLC input modules (24VDC logic systems)
Replaces / Drop-In Replacement For
- Allen-Bradley 873P-D18P1-2200-D4 (exact model)
- Other 873P series with equivalent 2200mm sensing distance and DC configuration
Works With
- 24VDC industrial power supplies and logic systems
- M18 threaded mounting fixtures and sensor brackets
- Micro QD connectors and DC pigtail harnesses
- Standard PNP input modules in Allen-Bradley and multivendor controllers


















