GAS FLOWMETER

FIELD: measurement technology. SUBSTANCE: device has upper chamber and lower chamber 3 with gas pressure tap holes and passage 4 located below lower chamber and used for connection of pipe line having common slot 8 where holder 9 with diaphragm 10 is mounted; diaphragm 10 has calibrated orifice 11 which is coaxial relative to passage 4. Proposed device has screws locking the holder, tooth-rack mechanisms for motion of holder with diaphragm, valves-compensators 19 and 20 mounted on chambers, outlet valve sealing plate 41 with cover 42 and pressure bolts 43. Mounted in lower chamber 3 is shut-off unit with sealing plate. Shut-off unit has shaft mounted in bearing supports. Secured on said shaft is pair of levers on which sealing plate is articulated; said sealing plate is provided with elastic cord over contour of slot in chamber and lever connecting the shaft with turn drive and load-bearing stop. EFFECT: enhanced accuracy of measurements. 2 cl, 10 dwg