Commonly referred to as thermal mass flowmeters, these transmitters calculate flow rate by measuring how much they cool as air and other gases pass through them. This means they’re accurate even if there are temperature and pressure changes, unlike most other transmitters. Used to monitor flow or control equipment, these transmitters, also known as transducers, convert measurements to an electrical signal that is interpreted by receiving devices. As flow increases, the output signal increases. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. They only give accurate readings within the rated measurement range. A digital display makes it easy to check the flow rate and adjust settings. Mount these transmitters inline with your system.

These transmitters are calibrated with air. You can use them with other gases, but they will not be as accurate.

Voltage Adapters—Voltage adapters are required to connect these transmitters to a power source.