Designed to test the RIV-601P/S spark detector window integrity against dust and dirt build-up.
Its use is recommended when internal test cannot be reliable bacause of window being covered or darkened.
It is mounted like a spark detector, using the same SAM-871 mounting unit, over the duct in the opposite position, so as it will be in front of the spark detector.
Power voltage 24Vdc 50mA.