New type of gas flow measurement instrument
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I wonder what gas detection instruments people usually use? Recently I came across a device called a \"sonic venturi nozzle gas flow automatic calibration device,\" but I’m not very familiar with its actual usage. Do you know of any good calibration devices? What operating conditions is it suitable for, and what are its advantages and disadvantages?
What you are referring to is likely a constant-flow nozzle, which is designed using the principle of the Critical Flow Orifice (CFO) and the concept of critical compression ratio. When the ratio of the absolute pressure behind the orifice to the absolute pressure in front of it is less than the critical compression ratio, the gas flow velocity approaches the speed of sound; at this point, the flow rate through the orifice (volume flow rate) reaches its maximum value and no longer changes with the pressure difference across the orifice. Such nozzles are widely used in constant-flow control applications. Right?
Reply to 2# lant: Thank you. I don’t quite understand it, haha. Let’s learn together and discuss it together~
A type of differential pressure. And orifice plates, venturi. Detecting gas is relatively convenient. Basically, all flowmeters can meet the requirements! A orifice plate will do!