What Are The Different Types Of Furnace Flame Sensors

There are several types of furnace flame sensors, including:

   1.Bimetallic Flame Sensor: This type of sensor consists of two different metals that expand at different rates when heated. As the metal expands, it moves a contact to complete an electrical circuit, signaling the presence of a flame.

   2.Optical Flame Sensor: This type of sensor uses a photocell to detect the ultraviolet (UV) light emitted by a flame. The sensor detects changes in the amount of UV light to determine if a flame is present.

   3.Infrared Flame Sensor: This type of sensor uses an infrared detector to detect the heat signature of a flame. It measures the intensity of the heat signature to determine if a flame is present.

   4.Ionization Flame Sensor: This type of sensor uses an electric current to detect the presence of ions produced by a flame. When a flame is present, it creates ions that flow through a small electric current, causing a change in the current that the sensor detects.

   Each type of flame sensor has its advantages and disadvantages, and the type used will depend on the specific furnace or boiler model. It's important to note that regular maintenance and cleaning of the flame sensor are essential to ensure proper operation and prevent failure.