A multi-jet flowmeter is a type of mechanical, velocity-based flowmeter commonly used to measure the totalized volume of fluids, especially water.

These meters operate by directing multiple tangential fluid jets onto a central impeller, causing it to rotate. The speed of the impeller's rotation is directly proportional to the velocity of the fluid flow. This rotation is then mechanically or electronically linked to a register that displays the cumulative volume of fluid that has passed through the meter.

Multi-jet flowmeters are valued for their accuracy, durability, and a design that is less susceptible to inaccuracies from unbalanced fluid flow or debris, making them a reliable choice for residential and commercial water metering applications.