Positive Displacement Flowmeter: Precision Flow Measurement You Can Count On

A positive displacement flowmeter is a mechanical device that accurately measures fluid flow by capturing and counting discrete volumes of liquid or gas. Unlike other types of flowmeters, it doesn’t rely on flow velocity—it directly measures the actual volume, making it one of the most accurate tools for low-flow and viscous applications.

How does a positive displacement flowmeter work?

It operates by trapping fluid in small chambers and counting how many times those chambers fill and empty as the fluid flows through. Each rotation or movement of internal components—such as gears, pistons, or vanes—corresponds to a known volume, which is then tallied to give a precise measurement.

These meters excel in applications requiring high accuracy and repeatability, such as fuel dispensing, chemical injection, oil and lubricant flow, or even food and beverage processing. They’re especially useful where flow conditions are variable or where other meters may struggle due to low flow rates or high viscosity.

In summary, a positive displacement flowmeter is a go-to solution when you need dependable, high-precision volume measurement—no matter the fluid’s speed, thickness, or direction.