Differential pressure flowmeters use Bernoulli's equation to measure the flow of fluid in a pipe. ... When the flow increases, more pressure drop is created. Impulse piping routes the upstream and downstream pressures of the flowmeter to the transmitter that measures the differential pressure to determine the fluid flow.
What is differential pressure in HVAC?
Differential pressure: the pressure between two points. ... Gauge pressure: the pressure between a measured point and the atmosphere. Absolute pressure: the combined pressure of the atmosphere and the measured point.May 1, 2020
How does a differential pressure transmitter work?
Differential Pressure (DP) transmitters measure the difference between two pressures. They use a reference point called the low-side pressure and compare it to the high-side pressure. Ports in the instrument are marked high-side and low-side.