Working principle of flammable and toxic gas alarm:
Catalytic combustion type
Combustible gas burns flamelessly on its surface. When the combustible gas enters the detection element of the alarm, an oxidation reaction will occur under the action of the catalyst, causing the temperature of the detection element to rise. The temperature change causes the resistance value of the detection element in the Wheatstone bridge (a bridge circuit composed of four resistors) to change, breaking the balance of the bridge and generating an electrical signal corresponding to the concentration of the combustible gas. After the signal is amplified and processed, it can drive the alarm device.
| Detection gas: combustible gas | Detection principle: catalytic principle | Detection accuracy: ≤±3% |
| Measurement range: 3%-100%LEL | Resolution: 1%LEL | linear error:≤+1% |
| Response time: ≤30s | Zero drift: ≤+1%(F.S/year) | Working temperature: -40℃~+70°C |
| Working humidity: ≤95%RH, no condensation | Repeat: ≤+1% | Signal output: 4-20mA or RS485 signal |
| Explosion-proof certification: CE21.0018X | Protection level: IP66 | Working pressure: -30Kpa~100Kpa |
| Working power supply: DC 24V | Link thread: M20*1.5 | Net weight: 1.5kg |
| Main material: aluminum | Installation method: wall-mounted, pipeline | Detection method: diffusion, flow, pipeline, pump suction |
| Transmission method: cable transmission 4-core cable, long-distance transmission (1-2 kilometers) | Receiving equipment: user computer, control alarm, PLC, DCS, etc. | Alarm method: external alarm, remote controller alarm, computer data acquisition software alarm, SMS alarm optional |
Product features:
1. Original imported sensors are used, sensors have a long lifespan.
2. On-site concentration display.
3. Standard infrared remote control, can use without opening the cover in dangerous places.
4. Anti-corrosion shell, durable and explosion-proof.
5. Multiple data receiving methods: computer, control alarm, PLC, DCS, mobile phone, tablet computer, etc.
6. Automatic calibration, sensor with 6 target point calibration functions, to ensure the accuracy of detection, data recovery.
