DEVICE MEASURING DENSITY OF LIQUID MEDIA Russian patent published in 1998 - IPC

FIELD: measurement technology, systems controlling manufacturing processes, measurement of density and level of drilling fluid and cement mortars. SUBSTANCE: device has source 5 of compressed air, two piezometric tubes 1 and 2 which one ends are submerged into tested liquid to different depth and converter 18 of difference of pressures in piezometric tubes 1 and 2 to proportional electric signal. Ends of piezometric tubes submerged into liquid are fitted with fluoroplastic end pieces 3 and 4. Outlet of source 5 of compressed air is connected with conduits 6 and 7 through pneumatic valves 8 and 9 and permanent throttles 10 and 11 to inlet pipe unions 12 and 13 of piezometric tubes 1 and 2 and with conduits 14 and 15 through pneumatic valves 8 and 9 to control conduits. Outlet pipe unions 16 and 19 of piezometric tubes 1 and 2 are connected to blank chambers of converter 18 by means of conduits 17 and 20. Check of level in vessel performed by measurement of depth H₁ of submersion of piezometric tube 1 below level of liquid. EFFECT: increased measurement accuracy and reliability of device. 1 dwg