1. Brief introduction
Fixed multi gas sensor is a safety device that can detect the concentration of four gases including oxygen (O2), combustible gas (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S) in the air.The multi gas detector can be powered by DC, and it can be connected to PLC,DCS,PC or other monitor system. The compound gas detector works by using various sensors that can detect the target gases. The sensors can be electrochemical, infrared, catalytic, or PID sensors, among others. Once the gas is detected, the detector will alert the user through visual and audible alarms. These detectors are mainly used in industrial and commercial settings where workers are at risk of exposure to hazardous gases.
The benefits of using composite gas detectors include increased safety, reduced risk of fires and explosions, and increased productivity. By detecting gas leaks early, operators can take immediate action to address the issue and prevent damage to equipment or harm to personnel. The detectors also provide an additional layer of protection for workers who may be exposed to hazardous gases during their work.
The multi gas sensors are typically mounted in fixed locations, such as near processing equipment or in areas where gas leaks are most likely to occur. They are designed to operate continuously, providing around-the-clock monitoring of gas concentrations. When a gas leak is detected, the detector will trigger an alarm and/or shut down equipment automatically to prevent the release of any additional gas into the air.
2. Features:
(1). High sensitivity: the composite gas detector is highly sensitive to various gases, allowing for accurate detection of even small amounts of gas.
(2). Fast response time: in case of gas leakage, the composite gas detector has a fast response time, immediately notifying the user of the issue.
(3). Multi-gas detection: with the ability to detect multiple gases, the composite gas detector is a versatile tool for gas detection.
(4). Remote Monitoring: fixed gas detectors can be monitored remotely, saving time and effort.
3. Technical parameters
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Product Name: |
Multi gas sensor |
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Product Size: |
142mm×178.5mm×91mm |
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Product weight: |
1130g |
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Detect Gas: |
CO H2S O2 CH4 etc. |
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Measure range: |
CO(0-1000ppm) H2S(0-200ppm) O2(0-30%vol) CH4(0-100%lel) |
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Resolution: |
CO(1ppm) H2S(1ppm) O2(0.1%vol) CH4(1%lel) |
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Response time: |
≤30s |
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Working voltage: |
DC24V |
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Output signal: |
RS485 with Modbus protocol |
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Options function: |
With audible & visual alarm need $15/pc |
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Transmission cables: |
Four wire core shielded cable 4 x 1 mm2 |
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Temperature range: |
- 20 ℃ ~ 50 ℃ |
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Humidity |
15%-90%(RH) |
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Certificate: |
CE,ATEX,ISO9001 |
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Explosion-proof marks: |
Exd II CT6 |
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IP class: |
IP65 |
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Transmission distance: |
<1000 m |



4. Application
The application areas for multi gas sensors are vast and varied. They are commonly used in chemical plants, refineries, mining operations, oil and gas exploration, wastewater treatment plants, and confined space entry, among others. The detection of harmful gases is crucial for the safety of workers and the prevention of accidents, explosions, and fires.
5. Maintenance
(1). Calibration: Regular calibration is essential to ensure accurate gas detection. Calibration should be performed at least once a year.
(2). Inspection: Fixed gas detectors should be inspected regularly to ensure that they are working correctly, and there are no cracks or damages in the device.
(3). Cleaning: It is essential to clean the device regularly to remove any dirt, dust, or debris that may hinder its function.
(4). Replacement of Parts: Components that become damaged or worn out due to aging or environmental conditions should be replaced promptly to ensure the proper functioning of the device.
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