Pressure transmitters measure differential pressure
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As shown in the diagram, the upper tube represents the positive pressure side while the lower tube represents the negative pressure side. The two tubes are connected and then linked to a pressure transmitter. Is this setup accurate for measuring differential pressure?
I didn’t quite understand it, hahaha:lol
Please add more details: 1. To measure the pressure difference between two pressure tapping points, which differential pressure transmitter should be used? Isn’t it the pressure difference with the air? 2. Are the two pressure sampling points connected by pipes? Lead a pipe from the connecting pipe to the transmitter? Receive from the H end or L end?
It depends on the medium inside your pipeline; if it’s a gas, there are no major issues, but if it’s a liquid, the level difference also needs to be taken into account
It is a pressure transmitter, with the pressure lead connected to the H terminal of the transmitter
I didn’t take a clear photo; it’s just the pressure sampling points for high and low pressure that are connected together, and then these connections go to the H terminal of the pressure transmitter
To measure the pressure difference, high pressure is fed in through h, and low pressure is fed in through l; they are fed separately. The pressure conduits for high and low pressures are filled with the medium to remove air and achieve zero calibration, before the system is put into use
1. Please use a differential pressure transmitter (with two interfaces H and L). 2. The pressure tapping point on the high-pressure side is connected to terminal H; the pressure tapping point on the low-pressure side is connected to terminal L. 3. Calculate the pressure difference resulting from the height difference between the two pressure tapping points, and transfer it away. 4. Introduce the medium into the transmitter, purge the air from the transmitter’s chamber, and it is ready for use. I hope this can help you.
I don’t know your import/export direction, so I can’t determine whether your connection is correct.