This type of smoke detector works by a Infrared LED pulsating its beam on the smoke particles and when the Infrared beam reflects of it, the photodiode light receptor recieves it and sends a signal to the circuit which sounds the alarm.

• · Responds well to slow-burning, smouldering fires
• · Well suited for bedrooms and escape routes
• · 360°C visibility of LEDs
• · Reduces false alarms
• · Quick and simple installation
• · Works using the light scatter principle
• · Detector changes to alarm state at a pre-set threshold of smoke penetration into the sensing chamber