Abstract: In a flow meter, especially for liquid cooling media in injection molds, comprising a housing with an inlet and outlet conduit and inside the housing a piston that is slidable against the force of an axially acting spring by the pressure of the fluid flowing through the housing in such a way that the displacement of the piston takes place in dependence upon the flow rate and is indicated through a window, provision is made, to attain a high measuring accuracy with a simple construction, for a helical spring (22) that is guided in extension of the inlet conduit (2) in an axial direction to be disposed in such a way that the entering fluid is transported around the centrically disposed helical spring (22).

Abstract: In a flow meter, especially for liquid cooling media in injection molds, comprising a housing with an inlet and outlet conduit and inside the housing a piston that is slidable against the force of an axially acting spring by the pressure of the fluid flowing through the housing in such a way that the displacement of the piston takes place in dependence upon the flow rate and is indicated through a window, provision is made, to attain a high measuring accuracy with a simple construction, for a helical spring (22) that is guided in extension of the inlet conduit (2) in an axial direction to be disposed in such a way that the entering fluid is transported around the centrically disposed helical spring (22).