Kromschroder UV photocell (UV tube) 74960445

The Kromschroder UV photocell (UV tube) 74960445 is a sensor component used for flame monitoring in industrial burners, furnaces, and heat generators. It operates on the principle of ultraviolet flame detection, with a spectral range of 190-270 nm and maximum sensitivity at 210 nm. This item complies with safety standard EN 298 and is an OEM equivalent to Sylvania P 578.61. It is designed to fit Kromschroder UVS 10 and UVS 6 flame sensors, as well as Honeywell Kromschroder automation systems. The country of origin is Germany.

Parts of this type are selected by matching the spectral sensitivity range, response time, and electrical interface to the burner control. The mechanical mounting arrangement, including thread size, viewing angle, and cooling requirements, must also be compatible with the existing installation. Before ordering, verify the connector type, cable length, and whether the sensor is self-checking or requires an external shutter test. Ensure the photocell is positioned to view the stable part of the flame, not the ignition spark.

When items of this kind fail, the burner control may not detect a flame during the ignition sequence, leading to a lockout. Common failure modes include a dirty or damaged lens, obstructed sight tube, or electrical issues such as wiring polarity or shielding problems. Check that the lens is clean and free of oil deposits, and that the sight tube is unobstructed. If the photocell fails to respond to UV radiation within the safety time, the control will enter lockout.