Smoke Detector
Common Base CompatibleOperation 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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