device for the production of a constant ueberdrucks in high-pressure gaselektroden for electrometric measurements in messmedien fluctuating pressure

摘要

In an appts. having a pressure transducer supplied from a gas source and controlled by the pressure of a measuring medium, for the prodn. of a constant excess pressure in high pressure glass electrodes for electrometric measurements in a measuring medium at a varying pressure, the transducer comprises a flow controller for maintaining the quantity of gas supplied continuously to the measuring medium, an adjustable throttle valve for producing a differential pressure in the controlled length of the gas pipe and a pipe connecting the interior of the glass electrode with the high pressure side of the throttle valve.