Smoke detector
Photoelectric smoke detector adopt the refraction method of smoke particle and infrared ray to detect fire. The circuits are mainly composed by infrared transmitter and receiver. Transmitter and receiver tubes put in optics labyrinth, optics labyrinth can screen out stray light from outside but no effect to detect smoke.
Introduction
- Photoelectric smoke detector adopt the refraction method of smoke particle and infrared ray to detect fire. The circuits are mainly composed by infrared transmitter and receiver. Transmitter and receiver tubes put in optics labyrinth, optics labyrinth can screen out stray light from outside but no effect to detect smoke.
- In no smoke situation, it only receive weak infrared ray. When smoke get into the detector, scattered effect will reinforce light receiving signal. When smoke reached a certain thickness, the detector will send out signal for warning. To decrease interruption and have lower power consumption, the transmitter circuit works by pulse method. This method also can have longer lifetime to transmitter tube.
Features
This product is no-code type smoke detector. It offers a pair of contact point, user can set the status as NO (normally open) or NC (normally close). When normal working, indicator will flash one time per 8 seconds. While warning, indicator will be lighted constantly and contact point status will change.
- Power-off reset/Auto reset selectable
- Alarm output NC/NO selectable
- 9～35V Nonpolar wide voltage input﹙AC, DC﹚
- Link output/LED alarm indicator
- Made by SMT Technology, high stability
- Low static current, save energy
- Dust-proof, insect-proof and anti-white light interference design
- Metal shielding, anti-radio frequency interference﹙20V/m—1GHz﹚
Technical Parameters
| Operating voltage | AC and DC 9V～35V |
Stand-by current | 16mA﹙Relay normally closed﹚ 3mA﹙Relay normally opened﹚ |
Alarm current | 8mA﹙Relay normally closed﹚ 19mA﹙Relay normally opened﹚ |
Alarm indication | Red LED always on |
Sensor | Infrared photoelectric sensor |
Operating temperature | -10℃～+50℃ |
Environment temperature | Maximum 95％RH﹙No condensation﹚ |
Anti-RF interference | 10MHz—1GHz 20V/m |
Alarm output | Normally open/ normally close optional, contact capacity DC28V100mA |
Reset mode | Automatic reset/ power-off rese toptional |
Coverage area | When the space height is 6m-12m, the protective area of a detector is 80 square meters for a general protection site. When the space height is less than 6m, the protective area is 60 square meters. The specific parameters should be based on the design spec for automatic fire alarm systems GB50116-98. |
Implementation standards | GB4716-2005，EN54-7 |
Sensitivity | 0.5db/m(±0.1db/m) |
Dimensions | 104mm(diameter)*51mm(high) |