The Hochiki SLV-24 can be used in al areas where Photoelec tric Smoke Detectors are required. The Patented smoke chamber makes the SLV-24 well suited for fires ranging from smoldering to fast-flame fires. NS-4 Series, NS-6 Series, HSC-4R or HSC-xxxR Style bases may be used with the SLV-24. Current interchangeable/ compatible devices are the SIJ-24 ionization detector, the SLR-24H photoelectric detector with heat sensor, and the DCD-135/190 heat detectors. All NS conventional devices are mechanically compatible with Hochiki America HSB, HSC, and YBA type bases which may have been used in previous installations. Please check indi vidual panel listings for compatible bases.

The SLV-24 photoelectric smoke detector utilizes two bicol ored LEDs for indication of status. In a normal standby condi tion the LEDs flash GREEN every 3 seconds. When the de tector senses smoke, and goes into alarm the status LEDs with latch on RED. The detector utilizes an infrared LED light source and silicon photo diode receiving element in 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 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 specific period of time. The time delay circuit triggers the SCR switch to activate the alarm signal. The status LEDs light continuously during the alarm period