Giersch 47-90-28268 KLC1000/230RS flamesensor

This is a Giersch flame sensor, listed under catalogue article 507.895.001 and manufacturer code 47-90-28268, designated KLC1000/230RS. Parts of this type belong to the flame detection group in a burner system, where they confirm that combustion has actually started after fuel admission. The burner control requires a flame signal within the safety time; if no signal is received, the control enters lockout and shuts down the burner. Flame sensors are selected by detection principle—ionisation for gas burners, UV or IR for oil and industrial burners where the flame is luminous and the sensor must have a direct line of sight. Other parameters include spectral range, response time, cable length, connector type, and the mounting sleeve. For oil and industrial applications, the sensor is typically mounted in a sight tube aimed at the flame. When replacing a sensor, ensure that the detection principle and electrical interface match the existing burner control. Contaminated optics, an aged cell with a weakened signal, or a damaged sheath are common failure modes. The sensor must see the flame directly, without obstructions from the blast tube or combustion head, to operate reliably.