Standard gas for environmental monitoring ‌

It is used for calibrating air quality monitoring stations in accordance with the requirements of "Technical Guidelines for the Preparation of Ecological Environment Planning" (HJ 1359-2024), and the concentration range is usually 0.1 to 1000 ppm‌.

nitrogen oxides (NOx) standard gas ‌

It contains components such as NO and NO₂, and is used for vehicle exhaust detection (such as the National VI standard) and industrial emission monitoring ‌.

Nitrogen is used as the balancing gas for the calibration of VOCs online monitoring systems, with common concentrations ranging from 1 to 1000 ppm‌.

Industrial safety standard gas ‌

Coal mine gas detection, natural gas leakage alarm, concentration coverage 0.1% to 100% LEL (lower explosive limit) ‌.

carbon monoxide (CO) standard gas ‌

Safety monitoring in the metallurgical and chemical industries, typical concentration 50-5000 ppm‌.

The detection of toxic gases in petrochemical and sewage treatment plants shall comply with GB 17681-2024 "Technical Specifications for Safety Monitoring of Major Hazard Sources of Hazardous Chemicals" ‌.

Laboratory analytical standard gas ‌

As carrier gas for gas chromatograph, the purity should be ≥99.999%‌.

Calibration of mass spectrometer, concentration accuracy reaches ppb level ‌.

Medical ventilators, combustion efficiency testing, common concentrations 21% to 100%‌.

Standard gas for special fields

Insulation testing of high-voltage equipment in the power industry shall comply with the environmental protection requirements of GB/T 41002-2022 "General Technical Specification for Children 's Luggage" ‌.

argon (Ar) standard gas ‌

Semiconductor manufacturing protective gas, purity ≥99.9999%‌.