Is it possible to use a thermal mass flow meter / flow controller for other fluids?

In general, a thermal mass flow meter/controller can be used for other fluids. However, it is important that the suitability of the sealing material used for the new gas or liquid is ensured beforehand. In addition, when using a thermal mass flow meter a conversion factor must be used, as the media differ in their thermodynamic properties. 

Another influencing factor is the Kv value of the valve. Using another medium affects the flow range for which the instrument was originally suited, this can change significantly. 

Unlike thermal mass flow meters, flow instruments using the Coriolis or ultrasonic measuring principle, are medium independent and do not require a conversion when using other media. However, when switched over to another medium with a liquid flow instrument, the pressure drop can be different.

Laptop with Fluidat software

To clarify the suitability of the sealing materials, please contact the local Bronkhorst office or distributor. We will gladly inform you about the conversion factors that apply to the thermal flow instruments, or you can register on our database Fluidat on the Net, which is free of charge, to set up the required calculations yourself. The database offers the user extensive calculation tools for conversion factors.

Go to Fluidat on the Net


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Willie Snaith Road
Newmarket Suffolk CB8 7TG
Tel. +44 1223 833222
[email protected]

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