GST Conventional Reflective Beam Fire Smoke Detector
Products Features:
1. Wide operating voltage range, big monitoring areas.
2. Combination of the emitting and receiving part makes mounting easy and optical pathway accurate.
3. Built-in microprocessor enables intelligent judgment of fire alarm and fault.
4. The detector can calibrate automatically, which ensures that one person complete adjustment in short time. It’s also convenient to operate.
5. Self-diagnosis function can monitor the inner fault.
6. Automatic compensation for factors weakening received signals, such as dust contamination, positional excursion and ageing transmitter.
7. It has passive output contacts for fire alarm and fault.
8. Two sensitivity levels can be set in field.
9. The detector’s optical pathway is designed with strong anti-interference ability.
10. SMT processing technology.
11. Attractive and decent appearance.
Technical Specifications:
1. Power Voltage: 15VDC-28VDC
2. Power Current: Commission current›20mA, Standby current›12mA, Alarm current›22mA
3. Fire Alarm and Fault Contact Output:
Fire Alarm Relay: Contact capacity 28V/2A, which is normally open in normal state and closed in fire alarm state.
Fault Relay: Contact capacity 28V/2A, which is normally open in normal state and closed in fault state.
4. Angle of Adjusting: -6°-+6°
5. Dependency Angle of Optical Pathway Orientation: 0.5¢
6. Sensitivity Level:
Level 1: High sensitivity.
Level 2: Medium sensitivity.
7. Indication of Detector State:
Commission: Green LED and Yellow LED are lit or flash in a certain way. See details in Section VI Commission.
Normal monitoring state: Red LED flashes periodically.
Fire: Red LED constantly illuminates, and Yellow LED turns off. Fire alarm should be cleared through powering up again.
Fault: Yellow LED constantly illuminates. The detector clears the fault signal automatically if the condition causing the fault disappears.
Optical pathway obscured totally: the detector first gives fault signal and turns on Yellow LED. 20s later, it alarms fire, illuminates Red LED and turns off Yellow LED.
Note: In this case, it does not mean there is a fire. After the obscuration is removed, the detector clears fault signal automatically. Fire signal has to be cleared by powering up the detector again.
8. Operating Environment: Temperature: -10°C-+50°C , Relative Humidity 95%, non condensing
9. Monitoring Area: aximum monitoring area: 14*100=1400m2 , Maximum width: 14m
10. Length of Optical Pathway: 8m-100m
11. Protection Level:
Under common environment, ingress protection rating is IP20.
Under special environment, ingress protection rating is IP66 through glue-seal treatment.
12. Dimension: length: 206mm width: 95mm thickness: 95mm
13. Material and Color of Enclosure: ABS, Gray
14. Weight: 450g
15. Mounting Hole Spacing: Spacing for embedding: 158mm
Spacings for surface mounting: 79mm€96mm
Structure and Operation Principle:
The detector and reflector are placed oppositely.
The detector includes emitting part and receiving part.
Infrared beam of certain intensity sent out from the emitting part is reflected by the right-angle prisms of the reflector, and then received by the receiving part of the detector.
The receiving part simultaneously collects and amplifies the returned infrared beam, analyzes and judges the collected signals through its microprocessor.
When the detector is in normal monitoring state, the intensity of infrared beam received by the receiving part is steady at a certain level.
When smoke particles enter the detecting area, the intensity of infrared light received by the receiving part falls owing to light scattering.
When the smoke particles reach a certain density, and the intensity of infrared light received by the receiving part is reduced below the preset threshold value, the detector alarms fire, illuminates Red LED, and closes passive fire output contact.
Operation principle is shown in pictures.
