A INTEGRATED MEASURING APPARATUS FOR MEASURING GAS PRESSURE AND LIQUID LEVEL FOR A LIQUID TANK

摘要

The present invention relates to a technology for measuring a gas pressure and a liquid level of a tank containing volatile liquid. An integrated measuring apparatus uses a single pressure sensor, while orderly measuring the gas pressure and a differential pressure by switching a passage for measuring the gas pressure and a passage for measuring the differential valve using a switching valve. The integrated measuring apparatus includes: a pressure sensor for orderly measuring one pressure combination between the gas pressure and a total pressure or the gas pressure and a liquid pressure; an upper pipe connected to the top of the tank; a lower pipe connected to the bottom of the tank; and the switching valve for switching a passage funneling between at least one input end of the pressure sensor.