Device and method for measuring a non-compressible fluid

A process for measuring a non-compressible fluid, comprising;

• providing a measurement device comprising:
• a first inlet for non-compressible fluid
• a second inlet for non-compressible fluid,
• the first and second liquid inlets being in fluid contact with each other downstream from the corresponding inlets,
• a first outlet from the device,
• a second outlet from the device,
• the first and second outlets being in fluid contact with each other upstream and downstream of the corresponding outlets,
• the first outlet having a first outlet valve providing access to the first outlet,
• the second outlet having a second outlet valve providing access to the second outlet,
• the second outlet having a flowmeter between the second outlet valve and the connection between the outlets downstream thereof;
• filling the device with a first fluid or vehicular fluid;
• closing the first outlet valve, thus preventing the first fluid from entering the first outlet;
• introducing through the second outlet, by injection or aspiration, a second fluid which has to be metered;
• and
• using the flowmeter to measure the vehicular fluid displaced by the entry of the second fluid.