When everything is working right, the moment flame touches the sensor, the module establishes and monitors this current flow. The voltage at the sensor is ac (alternating current), but because of the ...

Quite a few readers have asked questions about the Chinese flame sensor modules. First and foremost, these modules use a circuit similar to the one shown in the third method, and come in two versions.

All modules are for low-voltage (24 VAC nominal ... an igniter-sensor for ignition and a separate flame sensor and spark igniter for flame sensing. Whatever the combination, the system must have ...