LCD Screen Type Multi Gas Sensor NH3 O2 O3 H2S SO2 LEL H2 CH4 Gas Detector


RS485 / Analog / Ethernet / GPRS/ 4G / NB-IOT / WIFI, Toxic and harmful gas detector, industrial gas detection. Large LCD screen with four alarm function.

LCD Screen Type Multi Gas Sensor NH3 O2 O3 H2S SO2 LEL H2 CH4 Gas Detector

The single gas detector used for measuring gas concentration and temperature,widely used in factory,workshop,green house,clean room,industry and agriculture,wine bar,hotel,hospital,shop market,airport,railway station,entertainment hall and movie theater etc

Support RS485/ Analog/ Thernet / Wifi/ GPRS/ 4G/ Lora

Gas Detector Parameter
Gas Range Precision Working pressure range: 0.9-1.1atm


Response time: <15s


Working temperature:-30~50℃


Working Humidity: 0-100%RH(15~95%RH)




NH3 0-100ppm/0-1000ppm/0-5000ppm ≤±3%Swot(25℃ )
O3 0-10ppm/10-100ppm ≤±3%Swot(25℃ )
CH4 0-100%LEL  3%F.s
CH2O 0-2ppm/0-5ppm ≤±3%Swot(25℃ )
H2 0-100%LEL  5%F.s
C2H6O 0-1000ppm ≤±3%Swot(25℃ )
O2 0-30%/0-100% ≤±3%Swot(25℃ )
F2  0-1ppm ≤±3%Swot(25℃ )
H2S  0-100ppm/0-1000ppm ≤±3%Swot(25℃ )
HCN  0-50ppm ≤±3%Swot(25℃ )
HCL  0-50ppm ≤±3%Swot(25℃ )
PH3  0-20ppm/0-2000ppm ≤±3%Swot(25℃ )
Freon  10-1000ppm 5%F.s
CO  0-1000ppm/0-2000ppm ≤±3%Swot(25℃ )
CO2  5000ppm/1%/3%/65%/100% ±(50ppm+ 3%Swot(25℃ )
NO  0-250ppm/0-2000ppm ≤±3%Swot(25℃ )
NO2  0-20ppm/0-2000ppm ≤±3%Swot(25℃ )
SO2  0-20ppm/0-2000ppm ≤±3%Swot(25℃ )
SF6  0-500ppm ≤±3%Swot(25℃ )
C2H4O  0-100ppm/0-500ppm ≤±3%Swot(25℃ )

How to maintain the gas sensor

Maintaining gas sensors is essential to ensure their optimal performance and reliability in detecting hazardous gases. Proper maintenance helps to prolong the lifespan of the sensors and ensures accurate readings, contributing to the safety of personnel and the environment. Here are some key steps for maintaining gas sensors:

Regular Calibration:

Calibration is crucial to ensure that gas sensors provide accurate readings. Follow the manufacturer’s recommended calibration schedule, which may vary depending on the type of sensor and the specific gases being detected.
Use calibration gas with known concentrations to adjust the sensor’s response to match the actual gas levels it is designed to detect.
Keep a record of calibration dates, results, and any adjustments made during the calibration process.

Routine Inspection:

Regularly inspect the physical condition of the gas sensor, including the housing, connectors, and wiring. Look for signs of damage, corrosion, or wear that may affect the sensor’s functionality.
Check for the presence of contaminants or buildup on the sensor elements, as these can interfere with gas detection. Clean the sensor following the manufacturer’s guidelines if contamination is present.

Sensor Testing:

Conduct functional tests to verify that the gas sensor responds appropriately to the presence of target gases. Many gas detection systems have built-in test functions that allow for simulated gas exposure without introducing actual hazards.
Perform bump tests, also known as functional tests, to ensure that the sensor triggers an alarm at the appropriate gas concentration levels.

Environmental Factors:

Consider the environmental conditions in which the gas sensor operates. Extreme temperatures, high humidity, and exposure to corrosive substances can affect sensor performance.
When Protect sensors from environmental stressors by providing adequate ventilation, using weatherproof enclosures when necessary, and installing sensors in locations that minimize exposure to damaging elements.

Sensor Replacement:

Follow the manufacturer’s recommendations regarding sensor replacement intervals. When Over time, the sensitivity and accuracy of gas sensors may degrade, necessitating replacement to maintain reliable gas detection capabilities.
When replacing sensors, ensure that the new sensors are compatible with the existing monitoring system and follow proper installation procedures.

Document Maintenance Activities:

Maintain detailed records of all maintenance activities performed on gas sensors. This includes calibration results, inspection findings, testing records, and any servicing or repairs conducted.
When Documenting maintenance activities not only ensures compliance with regulations and standards but also provides a historical reference for tracking sensor performance over time.

Training and Awareness:

Ensure that personnel responsible for gas sensor maintenance are adequately trained in handling and servicing the equipment. When This includes understanding the specific requirements for each type of sensor and following proper safety protocols.
Encourage awareness among staff regarding the importance of gas sensor maintenance and the role it plays in ensuring a safe work environment.
By adhering to these maintenance practices, organizations can uphold the integrity and reliability of gas sensors, contributing to effective gas detection and safeguarding against potential hazards. When Additionally, regular maintenance helps to meet regulatory requirements and industry standards related to gas detection equipment.

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