Difference between mass flow meters and thermal mass flow meters

The measurement principles are different. Mass flow refers to a Coriolis mass flow meter, whose principle involves causing the bent tube to vibrate; under the influence of the fluid flow, this vibration leads to twisting of the tube, which is used to measure the mass flow rate. The principle of the thermal type is simple: a heating medium is used, and the fluid carries away the heat; its temperature is measured downstream to determine the flow rate. The measurable media are also different; mass flow is generally measured for liquids and highly dense gases. If the density is too low, the vibrations of the medium are not sufficient to bend the tube, making measurement impossible in principle ； The thermal type is used for gas flow measurement; the principle behind this device means that it can only be used to measure gases, but it is capable of measuring low flow rates, something that other gas flow meters cannot do.

What was said on the second floor is correct. As a supplementary point: 1. Different pipe diameters can be measured: Coriolis mass flow meters can measure pipes with relatively small diameters； And thermal mass flow meters, being available in insert-type versions, can measure gas in large-diameter pipes ； 2. Different pressure losses: Coriolis mass flow meters have a higher pressure loss, while thermal gas mass flow meters have almost no pressure loss (except for split-flow thermal gas mass flow meters)

It should be said that both the Coriolis force method and the thermal method are mass flow meters, representing two different measurement principles. Thermal mass flow meters are commonly used for measuring gas mass flow.

Both the Coriolis force type and the thermal type are mass flow meters, representing two different measurement principles. Thermal mass flow meters are commonly used for measuring gas mass flow and are suitable for large-diameter pipes.