This sensor module is primarily used to detect an open flame.  It does this by detecting light that is in the IR (infrared) spectrum which is emitted by a flame.  That spectrum is typically in the range of 700-1100nm.

This module is similar to a regular IR detector, but with a broader detection range.  It can be used as a general IR detector for other applications where a broad detection range is desired.

Outputs

The module has both an analog output and a digital output with sensitivity adjustment on the module.

The Analog output on ‘A0‘ is normally a voltage of approximately 1/2 Vcc when no signal is detected.  The actual voltage level will depend on the setting of the sensitivity pot. If a flame is detected, that output voltage will drop towards ground depending on the strength of the IR detected.

Packing List

1 x 4P Detection Flame Sensor