FIELD: measurement technology . SUBSTANCE: gear to fill internal spaces of pressure difference transducer has vessel containing working fluid connected by pipe-lines and cocks to spaces of transducer to be filled and vacuum pump. Vessel of gear is rotary: level of fluid contained in it in its vertical position is below outlet conduits. Vessel can communicate with atmosphere through one cock and with vacuum pump through another cock. Spaces of pressure difference transducer are filled when vessel is tilted, level of fluid is set above outlet conduits after vacuum pumping of system when pressure rises to atmospheric pressure. EFFECT: raised reliability of system thanks to reduction of number of vacuum-tight connections. 1 dwg
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