Flow switches are devices that monitor flow and send a trip signal to other devices, like a pump, for protection.

Gas flow switches and liquid flow switches, velocity, are used to measure the flow or quantity of a moving fluid in terms of velocity, such as feet per minute

Mass liquid flow switches and mass gas flow switches are devices used for measuring the flow or quantity of a moving liquid or gas in terms of a unit of mass per unit time, such as pounds per minute.

Gas flow meters are used for measuring the flow or quantity of a moving gas in an enclosed pipe or passage

Volumetric gas flow switches are devices with a switch output used for measuring the flow or quantity of a moving gas in terms of a unit of volume per unit time, such as cubic feet per minute

Flow meters (flowmeters) and flow sensors are devices used for measuring the flow rate or quantity of a moving fluid or gas

Mass spectrometers separate ions by their mass-to-charge (m/z) ratios.