To prevent the occurrence of a problem that water infiltrates into a gauge when the gauge is buried even when the gauge is used for detecting the pressure of an objective fluid under an outside air pressure.
A gauge 4 in which a sensor 6 for detecting the pressure of the objective fluid under the outside air pressure is installed to a flow passage passed through a case 11 is used in a buried state. The case 11 is constituted to transmit the outside air pressure to the sensor 6 from the outside of the buried area 15 of the sensor 6 through a vent passage 13 by leading the vent 14 of the vent passage 13 extended from the case 11 to the atmosphere 10 in a waterproofed environment 16 by taking out the vent 14 of the passage 13 from the buried area 15.
NIIMURA NORIO
ARAI TOSHINORI
Next Patent: METHOD AND DEVICE FOR TESTING AND INSPECTING VALVE