Kromschroder Flame sensor 84315201

Kromschroder flame sensor 84315201 is a UV-sensitive detector designed for monitoring flames in gas burners. It is intended for use exclusively with Elster Kromschroder automatic burner control units IFS, IFD, PFS, PFD, flame detectors IFW or PFF, and burner control units BCU or PFU. The sensor features a quartz glass heat guard lens, aluminum housing with integrated heat guard, and connection terminals with a clamping range of up to 2.5 mm². It has an RP 1/2 internal thread and M20 cable gland for cable diameters of 7 to 13 mm. The UV tube type is P578 with a spectral range of 190–270 nm and maximum sensitivity at 210 nm ±10 nm. The distance between the UV sensor and flame should be 300–400 mm, and the sensor operates in ambient temperatures from -40 to 80 °C. It has an IP65 enclosure rating and weighs 360 g.

Parts of this type are selected by matching the detector type (UV), connection thread (RP 1/2 internal), and cable gland size (M20) to the burner control unit and mounting requirements. The distance between the UV sensor and flame must be within the specified range (300–400 mm) for proper operation. Ensure the cable gland accommodates the cable diameter (7–13 mm) and that the connection terminals can handle the wire gauge (up to 2.5 mm²). Verify compatibility with the specific burner control unit model (e.g., IFS, IFD, PFS, PFD, IFW, PFF, BCU, PFU) before ordering.

UV flame sensors of this kind may fail due to UV tube degradation, leading to reduced sensitivity or complete loss of flame detection. Symptoms include burner shutdowns or failure to ignite, often accompanied by a fault code on the control unit. Check the UV tube for signs of wear or damage, and verify the sensor's output signal (minimum DC signal 1 µA) using a multimeter. Also inspect the quartz glass lens for dirt or cracks, which can obstruct UV radiation.