It detects ultraviolet lights emitted by the flame during the burning. It does not detect the infrared light sources and the light glare that might occur on the objects.
They are used in places with high ceilings, places with higher fire risks, and mediums with explosive and inflammable materials.
Sensor detection angle is 120 degrees
Supply voltage is 220VAC.
Operation current is 45uA
30mA alarm current
Plastic body