| 摘要 |
Both the pressure difference DELTA p between the bottom and the top of the tank 2 and the temperature T of the liquid 1 are measured. The density rho of the liquid is deduced from the temperature, and the quotient h = DELTA p/ rho gives the depth of the liquid in the tank. A prior calibration of the tank in its operational position, or a calculation from geometrical data, gives the law governing the variation V = f2(h), where V designates the volume of the liquid. The product rho V gives the required weight P. The calculations are carried out by a suitably programmed microprocessor or by a host computer connected to several tanks. Application to the handling of CO2 deliveries, of atmospheric gases, or of liquid hydrocarbons. <IMAGE>
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