What is the typical current produced by a flame sensor?

The typical current produced by a flame sensor is indeed in the range of 30 to 200 microamps. Flame sensors operate based on the principle of detecting the presence of a flame through a small electrical current that is generated when the sensor interacts with the ionized particles produced by the flame.

This current is vital for the safe operation of gas heating appliances. Within this range, the flame sensor can effectively communicate that a flame is present to the control system, allowing it to maintain safe operation and ensure that the gas valve remains open only when a flame is detected. If the current falls outside this range, it could indicate a malfunction or an unsafe condition, prompting the system to shut down to prevent potential hazards.

Understanding the typical current levels helps technicians diagnose issues with flame sensors and ensures they can effectively troubleshoot and maintain heating systems.