Measuring apparatus for determining filling level of e.g. diesel, in tank, has non-return valve that opens during high pressure difference on sides of hollow spaces, and closes with high pressure difference on sides of bubbles exit-opening

摘要

The apparatus (1) has a pressure sensor (7) for measuring the pressure in a conduit system with hollow spaces, and a non-return valve (6) arranged in the conduit system. The valve divides the conduit system between a bubbles exit -opening (8) and a gas pressure supply (5) e.g. pump, and between the gas pressure supply and the pressure sensor into two zones. The valve opens during high pressure difference on sides of the hollow space, which is assigned to the supply and the sensor, and closes during high or same pressure difference in the hollow spaces on sides of the opening. An independent claim is also included for a method for measuring the filling level of the liquid using a measuring apparatus.