Ultraviolet intensity sensor for Trojan disinfection systems, supplied with a 1 metre cable. The sensor monitors delivered UV dose so the controller can raise an alarm when lamp output or sleeve fouling takes the reactor below its validated dose. Two markings distinguish this variant and both are quoted as they appear on the part: the 30-degree type designation, and an output scaling of 20 mA corresponding to 100 W. Match both markings against the sensor being replaced, since Trojan sensors of the same physical form are not interchangeable across scalings. Reference number 1588-0110, 1 m cable, 20 mA = 100 W, 30 degrees.