QRB 1A-A068B70B Siemens

QRB 1A-A068B70B Siemens

Photoresistor Flame Detector

A flame detector using a photoresistor is a simple and effective device for detecting the presence of fire. It works by utilizing the principle that flames emit infrared radiation, which can be detected by a photoresistor.

The photoresistor changes its resistance based on the amount of light it receives. When exposed to the infrared radiation emitted by a flame, the photoresistor's resistance decreases significantly. This change in resistance triggers an alarm or other safety mechanism.

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