The modern production process, from the inspection of raw materials, the control of the production process, to the inspection and evaluation of the final product quality, is inseparable from various instruments and meters. In order to ensure high-quality production, it is necessary to regularly use various standard gases to verify or calibrate its instruments.

Various standard gases for calibration include: Methane in air (for Gas Chromatograph), Carbon monoxide/dioxide/propane mixtures (for Automobile emission analyzer), Sulfur hexafluoride in nitrogen (for SF6 leak detectors), Nitric Oxide in nitrogen (for NOx analyzers), Oxygen in nitrogen (for Oxygen analyzers), Hydrogen sulfide in nitrogen (for H2S gas analyzers), and many more.

The role of standard gas:

(1) Establish traceability of measurement. The gas standard substance has good uniformity and stability, can preserve the chemical composition and characteristic value of the substance, and transfer its value in different spaces and times.

(2) Promote the development of measurement technology and quality supervision.

(3) Carrying out the transfer of the value. Standard gas is a means to transfer the value and achieve consistent measurement results.

(4) Ensure that the test results are accurate and consistent.