Based on a square root-extracted output characteristic, this differential-pressure transducer is particularly suitable for measuring the volumetric flow rate, e.g. in air-conditioning units, in fans and ventilation ducts. The volumetric flow rate/flow velocity can be read off directly on-site via an optional display. The 3 or 4-figure LC display is available as an option. In addition to Pa and kPa, it can also display mmWs, inch H2O m3/h, m/s etc. An optional time constant of up to 5 s means the device can also be used under fluctuating pressure conditions and generates a stabilised output signal.