Operation 

The detection chamber consists of a light emitting diode (LED) and photodiode arrangement. The chamber is designed such that light emitted by the LED cannot normally reach the photodiode. In the event of fire, particles of smoke enter the chamber and scatter the light. As the smoke level increases, the scattering effect increases, causing more light to hit the photodiode. The chamber contains a unique baffle design which allows smoke to enter the chamber while preventing external light fromaffecting the photodiode. The photodiode input level is sampled to sense smoke density. When the smoke density exceeds a preset threshold the sensor indicates a fire condition by means of built-in buzzer and Alarm LED. 

Standard Feature: 

• Quick reliable detection of fire induced smoke

• Long battery life of up to 10 years

• Easy to install

• Built-in fire test feature with a simple click of a button

• Built-in Buzzer

• Built-in alarm LED

• Non-directional smoke chamber 

Specifications: 

Operating Source 3 V lithium battery (Included)

Rating 3V 15mA

Battery Life Approximately 10 years

Sound Pressure Level 70dB

Operating Temperature 32°F (0°C) ~ 104°F (40°C)

Dimensions 100mm x 100mm x 43mm

Color Bone

Weight120g