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[Products] What are the manufacturing methods of standard gases?

2017-12-05 10:00
For all standard gases, we carry out cylinder treatment according to their composition and concentration, and manufacture them using the gravimetric method, an absolute measurement method that conforms to the ISO 6142 standard. We transfer a fixed amount of the parent gas with two or more components (pure gases or a gas mixture manufactured through the gravimetric method) to a cylinder to be filled and evenly mix the components for manufacturing. Then, we verify the manufactured standard gas, in accordance with the ISO 6143 and ISO 17025 standards, and give it attribute values and an uncertainty in measurement before we deliver it to the customer.