Flow indicator / switch, brass or stainless steel, 2l / min ... 60l / min H2O, DN8-25
Pressure, differential, overpressure, vacuum, absolute pressure, flow converter.
Thermo-anemometer: measurement of air speed, flow and temperature (Pt100, Pt1000) in air ducts or vents, using hot-wire or propeller probes.
Rotation speed measuring device via light and reflecting label or measuring tip