Kromschroder Flame sensor UVS10D5G1 84315214

Kromschroder UVS10D5G1 (SKU 84315214) is a UV flame sensor designed for gas burner flame monitoring. It features a quartz glass heat guard, aluminum housing, and M20 cable gland, with an R 1/2 external thread for mounting. The sensor operates at ambient temperatures from -40 to 80 °C, has IP65 ingress protection, and weighs 360 g. It uses a P578 UV tube with a service life of approximately 10,000 operating hours, and the recommended distance between the sensor and flame is 300–400 mm. Connection is via terminals with a clamping range up to 2.5 mm², and the cable gland accepts diameters of 7 to 13 mm.

When selecting a replacement UV flame sensor of this type, ensure the thread size (e.g., R 1/2) and cable gland type (e.g., M20) match the existing mounting. Verify the sensor's electrical connection (terminals or leads) and the clamping range for wire size. The distance between the sensor and flame must be within the specified range (e.g., 300–400 mm) for proper detection. Also confirm the ambient temperature and ingress protection requirements of the application.

UV flame sensors of this kind may fail due to UV tube degradation or contamination of the quartz glass, leading to reduced sensitivity or false flame signals. Symptoms include burner lockout, intermittent flame detection, or failure to detect flame. Check the sensor's output signal and inspect the glass for dirt or damage. If the UV tube has exceeded its rated operating hours, replacement is necessary.