The FIBARO Smoke Sensor is a universal, Z-Wave compatible, optical smoke detector. The device can be battery powered (battery life approx. 3 years) or DC powered (12 or 24v DC). A Smoke alarm is signaled by a speaker, blinking LED diode and through operating commands sent to the Z-Wave network devices. Additionally, smoke alarm notification may be sent to an alarm system or fire alarm system hub, through a NC contact terminals opening. Optical detector allows for detecting smoke at an early stage of fire, often before flames appear and temperature starts to rise significantly. Moreover the device has a built-in temperature sensor, which can also trigger the alarm once the specified temperature threshold is exceeded. FIBARO Smoke Sensor is designed to be placed on a wall or ceiling. LED signaling diode signals fire, operating mode and may serve as the Z-Wave network range controller. The sensor is designed to operate in confined spaces, under normal conditions (lacking smoke, dust, condensed water vapour).