HOCHIKI SLV-24M Marine Photoelectric Smoke Detector
The SLV-24M is for use in enclosed spaces, for ceiling-mount installations only and for use in enclosed dry cabin locations, where the unit is protected against blowing, spraying, and dripping water. The patented smoke chamber makes the SLV-24M well suited for fires ranging from smoldering to flaming fires. NS4-220 (Marine Type) and NS6-220 (Marine Type) bases are used with the SLV-24M.
STANDARD FEATURES • Low profile, 2.0″ high (with base) • Highly stable operation, RF/Transient protection • Low standby current, 45μA at 24VDC • Two built-in power/alarm LEDs • Non-directional smoke chamber • Built-in magnetic go/no go detector test feature • Removable smoke labyrinth for cleaning or replacement • Highly resistant to false alarms caused by steam
The SLV-24M 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 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 continuously during the alarm period.
SPECIFICATIONS: Light Source GaAlAs Infrared Light Emitting Diode Rated Voltage 17.7 – 30.0 VDC Working Voltage 15.0 – 33.0 VDC Maximum Voltage 42 VDC Supervisory Current 45μA @ 24 VDC Surge Current 160μA max. @ 24VDC Alarm Current 150mA max. @ 24 VDC Air Velocity Range 0-4000 fpm Ambient Temperature 32°F to 120°F (0°C to 49°C) Color & Case Material Bone PC/ABS Blend Sensitivity Range 0.5 – 2.68%/ft Mounting Refer to NS Conventional Detector Base Data Sheet