To provide an inexpensive differential pressure measuring device capable of preventing the intrusion of rainwater and making stable pressure measurement with a simple structure.
This differential pressure measuring device having a vent hole ventilating between the inside and outside of the device is provided with a tubular flashing wall connected with an end portion to the outer opening section of the vent hole, provided around the axial center of the vent hole to surround the periphery, and forming a barrier against rain, an outflow section provided on the flashing wall to discharge the rain retained in the portion surrounded by the flashing wall, a columnar atmosphere guiding plug provided at the outer opening section of the vent hole to close the outer opening section with one end side, and an atmosphere releasing hole provided on the atmosphere guiding plug, communicated with the vent hole at one end and opened to the peripheral face of the atmosphere guiding plug at the other end on the opening section side of the flashing wall, not on the bottom section side of the flashing wall.
AKASHI KEITA
TSUMAGARI TETSUO
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