Is it possible to have gas flow without gas pressure?
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Today, I used a soap film flow meter to check the hydrogen flow rate for the FID detector in the gas chromatograph. Some problems arose during the measurement and I couldn’t figure them out. When there was only one soap film, it rose normally, with a gas flow rate of 50 ml/min. But when there were three or more soap films, they wouldn’t rise at all – they remained stationary. Using a different FID soap film resolved the issue. I don’t know what’s going on. Could anyone experienced tell me...
It’s too professional; I can’t answer it. I’ll have to ask an expert for help
Soap film flowmeters do not seem to be widely used, and many people are unaware of their working principle or unable to analyze it. I need you to post the working principle of this flow meter on Baidu so that others can help answer your questions
Glass soap film flow meter Specifications: 50ml, 100ml Use: Suitable for measuring the flow rate of any gas or liquid； As well as the flow calibration of devices such as atmospheric samplers, dust samplers, and gas chromatographs. How to use it: 1. Pour soapy water into the latex dropper at the bottom. 2. Connect the detector outlet to the air inlet at the bottom of the soap film flow meter using a thin rubber tube. 3. Squeeze the latex dropper to create a soap film, and simultaneously measure the time it takes for this film to pass through a certain volume. 4. The volume divided by time gives the result; it’s convenient to use an electronic soap film flow meter, as it performs the measurement and calculation automatically