The BN Thermic WH-402 Movement Sensor is a heavy-duty PIR (Passive Infrared) detector specifically designed for high-load applications, most notably for controlling shortwave infrared heaters.
Its primary advantage is a high switching capacity of 16A (3kW), which allows it to directly manage powerful patio or warehouse heaters that would overwhelm standard lighting sensors.
Key Technical Specifications
Switching Capacity: 16A at 230V.
Maximum Load (Heaters/Incandescent): 3000W.
Maximum Load (Fluorescent/LED): 600W.
Detection Range: Up to 12 metres with a 180° field of view (adjustable).
Time Delay: Adjustable from 5 seconds up to 18 minutes.
Weatherproof Rating: IP55, making it suitable for both indoor and outdoor use.
Mounting: Designed for surface mounting on walls or under eaves.
Special Features
Heater Optimization: Specifically tuned to prevent heaters from being left on in empty spaces, significantly improving energy economy.
Manual Override: You can switch the connected load to stay on continuously until dawn by toggling the isolation switch twice within 2 seconds.
Daylight Sensor: Features an integral sensor that can be set to ensure the unit only operates during the night (LUX adjustment).
Expansion: For loads exceeding 16A or for 3-phase applications, the WH-402 can be used to trigger a suitably rated contactor.