The working of differential pressure (DP) flowmeters is based on the Bernoulli’s principle. Here is the working of a differential pressure flowmeter explained in a few, easy-to-understand steps:
Step 1: A compression is created in the pipe by the differential pressure flowmeter.
Step 2: A pressure drop is created in the flowmeter because of this constriction.
Step 3: This pressure drop increases with the increase in the fluid flow.
Step 4: The upstream and downstream pressures are routed to the differential pressure transmitter by impulse piping.
Step 5: This differential pressure is then measured by the transmitter and fluid flow is determined.