SLR-835W - Hochiki Photoelectric Smoke Detector Head, White

The Hochiki SLR-835W White Photoelectric Smoke Detector Head can be used in all areas where photoelectric smoke detectors are required. It is suited for fires ranging from smoldering to flaming fires. 

The SLR-835W is compatible with the Hochiki NS4 Series, NS6 Series, HSC-4R or HSC-(X)R Style bases.  You have complete flexibility to choose the base that that best supports your installation requirements.

The SLR-835W Photoelectric Smoke Detector utilizes two bicolored LEDs for indication of status. In a normal standby condition the LEDs flash green every 3 seconds.  When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LEDs will flash Red every 3 seconds. When the detector senses smoke and goes into alarm the status LEDs will latch on Red. The detector utilizes an infrared LED light source and silicon photo diode receiving element in the smoke chamber. In a normal standby condition, the receiving element receives no light from the pulsing LED light source. In the event of a fire, smoke enters the detector smoke chamber and light is reflected from the smoke particles to the receiving element.  The light received is converted into an electronic signal.  Signals are processed and compared to a reference level, and when two consecutive signals exceeding the reference level are received within a specified period of time, the time delay circuit triggers the SCR switch to activate the alarm signal. The status LEDs light on the SLR-835W is continuously during the alarm period.