由于经济核算的需要,要求对计量槽中的介质量进行准确测量,为产量及成本核算提供可靠数据。在量的测量中,以测量液位较多。而在液位测量中,静压式(包括压力式和差压式)因其精度高,测量范围大是最广泛应用的一种。它的缺点是:在介质密度一定时,压力值与高度成一一对应关系, Due to the need of economic accounting, accurate measurement of the quantity of medium in the measuring tank is required to provide reliable data for production and cost accounting. In the measurement of the amount to measure the liquid level more. In the liquid level measurement, hydrostatic (including pressure and differential pressure) because of its high accuracy, the measurement range is the most widely used. Its disadvantage is: in the medium density, the pressure value and height into a one-to-one correspondence,