IONISATION VACUUM GAUGE Russian patent published in 2013 - IPC G01L21/00 

FIELD: measurement equipment.

SUBSTANCE: proposed ionisation vacuum gauge includes a magnetic electrodischarge vacuum sensor and a measuring unit connected via a cable to the vacuum sensor, which contains a high-voltage power source, a current-measuring resistor and an indicator parallel connected to that resistor; the vacuum sensor cathode is connected via a cable and the current measuring resistor to a negative bus of the high-voltage power source; electrodischarge vacuum sensors, n current measuring resistors, n indicators and n+1 current-limiting resistors are introduced. The anode of each vacuum sensor is connected via the corresponding cable and the corresponding current-limiting resistor to positive bus of the high-voltage power source; the cathode of each vacuum sensor is connected via the corresponding cable and the corresponding current resistor to negative bus of the high-voltage power source that is made in the form of a converter of accumulator constant voltage to high voltage of vacuum sensors. Each indicator is parallel connected to the corresponding current measuring resistor; at that, value of all current-limiting resistors R_limit1…R_limitn is set within R_limit1=…=R_limitn=(0.5-2.0)Ub/Imax.1(n)>>R_measuring1=R_measuringn, where Ub is voltage of a high-voltage power source, Imax.1 and Imax.n are maximum currents of discharges of the first and n vacuum sensors in the measuring mode.

EFFECT: enlarging functional capabilities of an ionisation vacuum gauge owing to increasing the number of vacuum sensors to two or more; providing simultaneous and independent operation of two and more vacuum sensors from a common high-voltage power source, and reducing dimensions and weight of the measuring unit.

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