Honeywell UV detector C7027A1031/U

The Honeywell C7027A1031/U is an industrial UV flame sensor for gas, oil, and combined burners. It detects the presence of ultraviolet radiation emitted by a flame, working with compatible Honeywell flame control systems. This sensor has a 1/2-14 NPSM internal thread and is rated for a maximum pressure of 5 bar. It is available with wire lengths of 6 ft (1.83 m) or 24 ft (7.32 m). The unit also appears under type designations C7027A1031/B, C7027A1023, 129685, 129808, 139464M, and 139464N, and is compatible with amplifiers R7249A, R7290A, R7749B, R7849A, and R7851B. The spare flange seal is 129685.

When replacing a UV flame sensor of this type, verify the thread connection is 1/2-14 NPSM internal thread for mounting on a 1/2-inch inspection tube. Choose the wire length option (6 ft or 24 ft) that matches the existing wiring. Ensure the sensor is compatible with the flame amplifier in use; common Honeywell amplifiers are R7249A, R7290A, R7749B, R7849A, and R7851B. Also check the maximum allowable pressure (5 bar) and inspect the flange seal (129685) for wear before installation.