| 摘要 |
PURPOSE:To provide the apparatus wherein change in water volume is not substantially yielded, deterioration of parts is little, and maintenace is easy and to make it possible to calibrate meters at every measuring time, by piercing a small needle shaped pressure sensor through a film into the water and performing the measurement. CONSTITUTION:The sensor is constituted by an injection needle shaped tip part 6, an outer shell 7 of the sensor which forms a unitary body with the tip part 6, a pressure medium 8 which is provided in the outer shell 7 and transmits the pressure, a pressure receiving part 9 which senses the pressure of the pressure medium, a transducer part 10 which transduces the pressure into an electric signal, a cord 11 which sends the transduced electric signal, and a recording part 12 which displays and records the measured value in displacement unit. Water tanks 1 are installed on measuring points P, with levels being provided. Cock parts 4 are communicated by a communicating pipe 5. The cocks 4 are opened and the water W is inputted in the tanks 1, so that the heights of the water W in all the water tanks 1 are higher than rubber films 3. The water pressure in each water tank 1 is acted on the pressure receiving part 9 through the pressure medium 8 of the sensor, and the pressure is transduced into the electric signal by the transducer part 10. The signal is transmitted to the recorder 12 through the cord 11 and displayed. |
