| 摘要 |
PROBLEM TO BE SOLVED: To enhance the reliability of an electromagnetic flow velocity sensor by preventing the sensitivity of the sensor from changing. SOLUTION: An insulation cap 17 made of resin is fitted on an end part (illustrated at a right end) of a cylindrical shell 4 made of metal of this electromagnetic flow velocity sensor. An annular groove 4a of the shell 4 and an annular protrusive ridge 17a of the cap 17 are engaged with each other to constitute an engagement means for preventing the cap from dropping off. Electrodes 6 and 6 protrude from a body 5. In this sensor, metal of a different kind is kept from separating out onto the surface of the shell 4 near the electrodes 6 with the sensor inserted in a fluid under measurement. Accordingly, impedance across the electrodes and earth is fixed, keeping the sensitivity of the sensor from changing. COPYRIGHT: (C)2005,JPO&NCIPI
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