Kromschroder Flame sensor UVS10D2 84315205

The Kromschroder UVS10D2 is a UV flame sensor designed for monitoring flame dynamics in gas burners. It operates exclusively with Elster Kromschroder automatic burner control units (IFS, IFD, PFS, PFD), flame detectors (IFW, PFF), or burner control units (BCU, PFU). The sensor features an aluminum housing with integrated heat guard, quartz glass lens, and a P578 UV tube with a spectral range of 190–270 nm. It has a service life of approximately 10,000 operating hours, an ambient temperature range of -40 to 80 °C, and an IP65 enclosure rating. The distance between the UV sensor and flame should be 300–400 mm, and the cable gland accommodates diameters of 7–13 mm. Weight is 360 g.

When selecting a replacement flame sensor of this type, ensure compatibility with the burner control system, as UV sensors are often model-specific. Verify the mounting thread (e.g., 1/2" NPT) and the required viewing tube length to position the sensor at the correct distance from the flame (typically 300–400 mm). Check the cable gland size to match the existing cable diameter, and confirm the ambient temperature and enclosure rating meet the installation environment. Always compare the sensor's UV tube type and spectral sensitivity with the original specifications.

Common failure modes for UV flame sensors include degradation of the UV tube, leading to reduced sensitivity or intermittent flame detection. This may cause the burner to shut down unexpectedly or fail to ignite. Contamination of the quartz glass lens or internal optics can also block UV radiation, resulting in false flame loss signals. Check for proper alignment and cleanliness, and verify the sensor's output signal (minimum DC signal of 1 µA) using a suitable meter. If the sensor fails, the burner control unit may display a fault code indicating flame detection failure.