Description Apollo XP95 IS Optical Smoke Detector. The XP95 IS Optical Smoke Detector works using the light scatter principle and is ideal for applications where slow-burning or smouldering fires are likely. A safety barrier is a mandatory part of an I.S. system, but the high series impedance limits the number of I.S. detectors that may be fitted to the circuit. Typically, an I.S. circuit will have a maximum load of 20 detectors (restricted to 12 optical detectors in a IIC environment) depending on the barrier type, the type of devices fitted and the number of detector LEDs allowed to illuminate concurrently by the CIE. Apollo Part Numbers: 55000-640APO, 55000-640SIL Made in the UK
