To provide a cheap pressure measuring instrument having an improved corrosion resistance.
The pressure measuring instrument having a nipple connected to one end of the instrument body comprises a protrusion provided on one end of the body, an anticorrosion material-made wettable block connected at one end to the top face of the protrusion, an anticorrosion material-made wettable diaphragm provided on the other end face of the liquid contact block, an anticorrosion material-made nipple connected to the protrusion of the body, a recess provided on the opposite surface of the nipple to the protrusion inserted in the recess communicating with the through-hole of the nipple, and a weld zone welding the side face of the wettable block to the side face of the recess like a ring.
NISHIKAWA SUNAO
AIZAWA MAMORU
YAMAMOTO OSAMU
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