Abstract: A turbine for a flowmeter includes pulse-generating elements which are distributed at specified angular intervals adjacent to a front wall of a wheel hub for measuring speed. The pulse-generating elements are housed in a pot-like, plastic container having a bottom that forms the front wall. A circumferential wall of the container and the pulse-generating elements, on a side thereof opposite the front wall, are sprayed with a plastic material.

Abstract: The invention relates to a process for calibrating a calorimetric flow indicator to a medium to be measured. The flow indicator has a sensor element that provides a temperature-dependent resistance and which heat up in a short period of time by means of electrical current heat. The resistance variation of the sensor element represents a measure of the flow velocity of a medium flowing by the sensor element. The calorimetric flow indicator is set for a specified medium other than the medium to be measured, with a resistance value Ro at a zero flow and a resistance value R.sub.max at a maximum flow, defining a preset range of measurement R.sub.max --Ro for the specified medium.

Abstract: A calorimetric flow indicator includes a sensor element which forms a temperature-dependent resistance and which heats up in a short period of time by application thereto of electrical current. A resistance variation of the sensor element, induced by cooling, represents a measure of flow velocity of a medium flowing by the sensor element. The sensor element rests against an inner surface of a front wall of a housing projecting into the flowing medium. That section of the housing that includes the front wall and projects into the flowing medium has the shape of an obtusely truncated cone.