- Đầu dò lửa cho khu vực chống cháy nổ.
- Phát hiện được ngọn lửa 0,1m2 ở khoảng cách 25 mét với độ nhạy Class 1theo tiêu chuẩn EN 54-10.
- Góc dò lửa: 120 độ (Hình nón).
- Sử dụng công nghệ dựa vào bước sóng hồng ngoại kết hợp với các bộ lọc và kỹ thuật xử lý tín hiệu nên độ chính xác của đầu dò rất cao.
- Hoạt động với độ tin cậy cao ngay cả trong trường hợp ống kính bị dơ bẩn do bụi, dầu, hơi nước…
- Thích hợp sử dụng trong nhà và ngoài trời.
- Thích hợp sử dụng cho những nơi có vật liệu như chất lỏng, gas cháy không khói cũng như những vật liệu chứa nhiều carbon khi cháy cho rất nhiều khói.
016519 IR3 Flame Detector, explosion-proof
Flame detectors are used to detect open flames indoor and outdoor. They respond to the light emitted from flames during combustion. Flame detectors are especially suitable for smokeless liquid and gas fires not visible for the naked eye as well as for fires of materials that contain carbon with strong smoke emission. Typical areas of application are large industrial warehouses, airplane hangars, chemical facilities, oil refineries, machine rooms, ferries and freight ships, power plants, printing plants, wood warehouses, subway tunnels. Flameproof equipment is contained in an enclosure so strong that an internal explosion will neither damage the enclosure nor be transmitted outside of it. The surface remains cool enough not to ignite the explosive mixture.
Functions
Most IR flame sensors respond to 4.3 μm light, emitted by hydrocarbon flames. By responding to 0.75 to 2.7 μm light emissions from fires almost all flickering flames can be detected. The flame detector has three IR sensors. The detector discriminates between flames and other light sources by responding only to particular optical wavelengths and flame flicker frequencies. False alarms due to factors as flickering sunlight are avoided by a combination of filters and signal processing techniques. Low-frequency detection enables the sensor to operate through a layer of oil, dust, water vapour, or ice. An alarm is indicated via increasing supply current consumption (2-wire) or via relay contact (4-wire). The alarm current also illuminates the red LED of the detector.
Specifications
| Detector (W x H x D) | 146 x 150 x 137 mm |
| Cable gland entries | 3 x 20 mm |
| Terminal functions | |
| 1 – 2 | Supply in connections or 2-Wire connections +IN and -IN |
| 3 – 4 | Remote test input connections +R and -R |
| 5 – 6 | Alarm Relay RL1 connections |
| 7 – 8 | Fault Relay RL2 connections |
| Operating voltage | 14 to 30 V DC |
| Current consumption, 2-Wire configuration | |
| Standby | 4 mA |
| Alarm | 20 mA |
| Current consumption, 4-Wire configuration | |
| Standby | 8 mA |
| Alarm | 20 mA |
| Housing material | Copper Free Aluminium Alloy (LM25) |
| Housing color | Red |
| Weight | 2.5 kg |
| Protection category (EN 60529) | IP66 |
| ATEX | Ex II 2GD Ex d IIC T4 GbEx tb IIIC T135℃ Db IP66 A21 |
| IECEx | Ex d IIC T4 GbEx tb IIIC T135℃ Db IP66 A21 |
| Permissible operating temperature | -10 to +55°C |
| Permissible storage temperature | -20 to +65°C |
| Relative humidity | 95%, no condensation |
| Detection principle | Detection of low frequency (1 to 15 Hz) flickering infrared radiation |
| Operating wavelength band | 0.75 to 2.7 µm |
| Detection area | 90° cone |
| Sensitivity | High (Class 1 ) and Low (Class 3 ) |
| Range | Class 1: 0.1 m² n-heptane at 25m Class 3: 0.1 m² n-heptane at 12m |
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