Which device is best suited for determining flow rates in HVAC liquid systems?

The best device for determining flow rates in HVAC liquid systems is the flow meter. This specialized instrument is designed to measure the volume or mass of a liquid flowing through a conduit, providing precise flow measurements essential for optimizing system efficiency and performance.

Flow meters work on various principles, such as differential pressure, magnetic fields, or mechanical movement, to deliver consistent and accurate readings. This information is crucial in HVAC applications where the control of liquid flow can impact temperature regulation, system performance, and energy efficiency.

Other devices such as thermometers, pressure gauges, and manometers serve different purposes. Thermometers measure temperature, which is important in HVAC systems but does not provide information on the flow rate. Pressure gauges measure pressure, which can indicate system performance but does not directly quantify the flow of liquid. Manometers also measure pressure, particularly in terms of fluid column height, but like pressure gauges, they do not provide flow rate measurements. Thus, for flow rate determination, the flow meter is the appropriate and effective choice.