Method and device for measurement of liquid volume and/or flow rate

A method for liquid measurements relating to an unknown volume or an unknown flow rate, the method comprising:

• providing a sensor (1) comprising a sensor surface (3) arranged to receive a liquid (5) thereupon, an electrical heating element (7) arranged to heat said surface (3), and an arrangement (11, 13;
• 7, 15) for measuring a temperature of said sensor surface (3);
• receiving liquid (5) on said sensor surface (3);
• heating said sensor surface (3) by means of said electrical heating element (7) at a known rate (P) while taking a plurality of temperature measurements (T) of said sensor surface (3) in function of time (t), said heating being at an absolute temperature of at least 90% of the boiling point (Tb) of said liquid (5) under ambient pressure;
• deriving a volume measurement or a flow rate measurement of the unknown volume or the unknown flow rate related to said liquid (5) from said electrical heating rate (P) and said temperature measurements (T).