Abstract: A floating-probe flowmeter for measuring the flow rate of a moving medium includes a measuring tube through which flows a medium against the force of gravity and a float capable of moving at least in the direction of the medium flow. The surface of the float that is exposed to the flow of the medium and/or the inner surface of the measuring tube at least in the area of movement of the float is/are provided with a microstructure designed to virtually eliminate the effect of the viscosity of the flowing medium on the lift of the float.

Abstract: A floating-probe flowmeter for measuring the flow rate of a moving medium includes a measuring tube through which flows a medium against the force of gravity and a float capable of moving at least in the direction of the medium flow. The surface of the float that is exposed to the flow of the medium and/or the inner surface of the measuring tube at least in the area of movement of the float is/are provided with a microstructure designed to virtually eliminate the effect of the viscosity of the flowing medium on the lift of the float.

Abstract: A float-type flowmeter and method for measuring the flow of fluids, incorporates a measuring tube through which measuring tube the fluid can flow against the force of gravity and which is provided with a float capable of moving at least in the direction of the flow, and an acquisition unit capable of tracking the movement of the float, with a motion signal corresponding to the movement of the float being transmissible to a diagnostic unit in which diagnostic unit an oscillation signal corresponding to the oscillation amplitude of the float can be derived from the motion signal and an error or alarm signal can be generated when, for a predefined length of time, the oscillation signal falls below a minimum setpoint value.