Model ACC-EN(SCI) is a Multi-Sensor with SCI, which is fully compatible with Hochiki’s ESP Analogue Addressable Protocol, and incorporates a thermal element and High Performance photoelectric smoke chamber. The ACC-EN(SCI) has three modes, which are controlled from the Control Panel, allowing either the optical element or thermal element or both elements to be active in making the fire decision*. The sensor polling LEDs can be controlled via the Control Panel (pulsing/non-pulsing*). The ACC-E(SCI)smoke chamber can easily be removed or replaced for easy maintenance.