Armitage Shanks Sensorflow 21 IR Sensor Module — F961131NU
The Armitage Shanks F961131NU is a high-precision Infrared (IR) Sensor Module designed specifically for the Sensorflow 21 commercial urinal flushing range. This "Function 4.4" unit comes complete with the necessary wiring for seamless integration into existing control systems. Engineered for high-traffic environments, it provides reliable "no-touch" operation, ensuring maximum hygiene and water efficiency by triggering a flush only after a user has moved away from the detection zone.
Identification Guide:
MPN: F961131NU | Series: Sensorflow 21 | Technology: Active Infrared | Application: Urinal Flush Valves (Mains or Link versions)
Key Features
- Function 4.4 Logic: Optimized for urinal flushing with specific delay and run-time parameters.
- Hygienic Operation: Eliminates the need for physical contact, reducing the spread of bacteria in public washrooms.
- Direct Replacement: Fits standard Sensorflow 21 panel-mounted and surface-mounted housings.
- Pre-Wired: Includes the factory-fitted connection lead for secure attachment to the Power Supply Unit (PSU).
Installation Tip
When installing the F961131NU, ensure the sensor lens is clean and unobstructed. Most Sensorflow 21 modules undergo a calibration phase upon first power-up; avoid standing in front of the sensor during this 20-second startup period to ensure the detection range is set correctly.



