Accurate measurement of hydrogen flow rate
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For the accurate measurement of hydrogen flow rate, it is necessary to have a wide range and high precision; it is best to choose an appropriate flow meter for this purpose
Thermometric gas mass flow meter, OK
"The range should be wide\" —— how wide exactly? ““The precision needs to be high” — how high?
The range ratio is preferably 80:1, with a precision of 0.075
Here, we use orifice flow meters to measure hydrogen, with a diameter of around 150
Mass flow meter! Preferred! But the precision you mentioned cannot be achieved on Earth!
How is it working? Is the low-flow display stable?
It’s okay, just needs to be drained from time to time
Original poster, the precision level you require is beyond what any flow meter can achieve. Flow measurement involves complex quantities, with many factors affecting the results; it’s not like pressure measurement, where it’s possible to achieve a precision of 0.1 level easily. Flow meters that can reach such a precision level are used as standard testing devices by calibration institutions. Therefore, stating a precision of 0.075 is incorrect.
It’s at the 0.1 level, and the actual measurements aren’t very stable either