Brahma Phototransistor FT11/V 18209013

The Brahma FT11/V 18209013 is a flame sensor of the phototransistor type, designed for use in burners and boilers. It features a cable length of 800 mm and is manufactured by Brahma under the model designation FT11/V. This sensor detects infrared radiation from a flame, providing a signal for flame monitoring and safety control systems.

When selecting a replacement phototransistor of this kind, ensure the cable length and connector type match the burner control or flame safeguard relay. The sensor must be positioned with a direct line of sight to the combustion zone, typically mounted in a sleeve or peephole. Verify the spectral range and response time are compatible with the burner's flame characteristics. Check the mounting sleeve size and seal to prevent flue gas leakage or false readings.

Common failure modes include a contaminated optical window that attenuates the signal, an aged phototransistor cell with reduced sensitivity, or a broken sheath exposing internal wiring to moisture or heat. Symptoms may include intermittent flame detection, failure to ignite, or unexpected burner shutdowns. Inspect the sensor window for dirt or damage and check the cable for wear or breaks.