Kromschroder Flame sensor UVS10D3 84315207

The Kromschroder UVS10D3 (SKU 84315207) is a UV flame sensor designed for flame control in gas burners. It operates by detecting UV radiation from the flame using a UV tube type P578, with a spectral range of 190–270 nm and maximum sensitivity at 210 nm ±10 nm. The sensor features a quartz glass lens, an aluminum housing with an integrated heat guard, and a 1/2 NPT internal thread connection. It has an ambient temperature range of -40 to 80 °C, an ingress protection rating of IP65, and a weight of 360 g. The UV tube has a service life of approximately 10,000 operating hours, and the recommended distance between the sensor and flame is 300–400 mm. This sensor is compatible with Elster Kromschroder control units including IFS, IFD, PFS, PFD, IFW, PFF, BCU, and PFU.

When selecting a replacement flame sensor of this type, ensure that the detector type (UV), connection thread (e.g., 1/2 NPT), and cable gland diameter match the existing installation. The distance between the sensor and flame must be within the specified range for proper detection. Verify the ambient temperature and ingress protection requirements of the application. The sensor must be compatible with the burner control unit model in use.

Common failure modes for UV flame sensors include degradation of the UV tube, leading to reduced sensitivity or failure to detect the flame. Symptoms may include burner lockout, false flame signals, or intermittent operation. Check the sensor's lens for dirt or damage, and verify the UV tube's service life has not been exceeded. Inspect the cable connections and ensure the sensor is correctly positioned relative to the flame.