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Smoke Detector

Common Base Compatible

Operation Theory

The infrared light beam from transmitter intersect the smoke particles will cause the light spread to all directions. When receiver has sensed the light, it will send signal to control panel for fire alarm status as soon as the density of smoke reaches pre-determined alarm level.

Construction and Characteristics

  • Electronic circuit are mainly used ONECHIP HYBRID I and SMT technology, low profile design, low power consumption, high precision and stability
  • Transmitter projects beam signal every 3 seconds to check any smoke caused by real fire. When smoke density reaches the preset standard, receiver will confirm the signal for 16 consecutive times. Control panel will then receive the fire signal after confirmation is made
  • Detector has a monitoring LED operate about every 16 second (flash) during standby status. When there is smoke, detector will issue fire signal after 16 consecutive times of confirmation on every 0.3 second. If any dust cause flashing or inconsecutive signal, it will back to normal status after 32 confirmations.
  • Insect guard has a radius 0.5mm it can prevent the invasion by insects, decrease fault alarm. Besides, it also has great discharge effect on electrostatics.
  • Smoke gate has a special design to obscure the strong light effectively and lead smoke comes in easily. Steam will not stay on the insect guard screen to cause the false alarm.

Specification

Type 2-wire   3-wire   4-wire
Alarm Contact N/A      N/A      0.8A @ 30 VDC
                      0.4A @ 125 VAC
Voltage Range 12 - 30VDC
Alarm Current Max. 30mA
Surge Current 2A / 100ms
Standby Current 20-30uA (Loop response under 75uA)
Permissible Current 185mA
Sensitivity Setting 1.50 - 2.80 ft
Ambient Temperature 0 C -+ 37.8 C
Material fire-proof plastic
Dimensions 102mm (Dia.) x 50mm (H)
Weight about 170g
Colour White

Effective Alert Area

Building Height Under 4M        4-20M
Area Covered 150M               75M

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