Precisely formulated gas mixtures with known concentrations of particular target gases are referred to as calibration gas standards. To guarantee the accuracy of gas concentration measurements, almost ...

Turndown ratio can be defined as a measure of the usable range of an instrument. It is expressed as the full-scale range divided by the lowest point of measure. It indicates the instrument range ...

As today's science and engineering focuses more and more on micro technology, the requirement to be able to measure and control extremely low gas mass flow rates has become very important. With ...