| 摘要 |
PURPOSE:To measure liquid accurately without producing any waste by controlling the pressure of a pressure chamber into which one end of a measuring tube of which both ends are tapered off is inserted thereby sucking and injecting the liquid. CONSTITUTION:The measuring tube 30 of a measuring device 3 of which top and bottom end parts are tapered off is set in a measuring position, and when an operating member 4 is contracted, the volume in a pressure chamber 31 expands and the pressure in a pressure chamber 31 decreases; therefore, the liquid 2 in a liquid storage tank 1 is sucked into the tube 30. In this state, the pressure in the chamber 31 is so set as to be low slightly more than the measuring quantity of the tube 30; therefore, the sucked liquid 2 overflows slightly into the chamber 31. The overflowed liquid 2 is returned into the tank 1 by opening a cock 36. The device 3 is turned up to an injecting position by a link device 5, and the measured liquid 2 is injected into an injecting tube 6 by the pressing operation of the member 4. |
