FIELD: instrument engineering.
SUBSTANCE: invention relates to the field of instrument making, in particular to indicators created on the principle of pressure drop measurement, for external installation on gas filters in order to control degree of their clogging. Technical result is achieved by using a gas filter clogging indicator, which comprises a pressure differential assembly comprising a membrane with a slide and a movable bushing, a shaft with a screw groove, a washer, and a differential pressure display unit, which comprises a pointer and a dial, wherein the membrane is configured to move simultaneously with the movable bushing and the slider resting against the screw groove of the shaft for transmission through the rotation washer to a pointer pressing to the washer with a frictional washer.
EFFECT: high accuracy of readings with simultaneous increase in the reliability of the indicator and improved ergonomic parameters.
7 cl, 2 dwg
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