| 摘要 |
PROBLEM TO BE SOLVED: To provide an oscillatory transducer employing two line transmission between a detector and a converter while keeping explosion-proof structure in which oscillation characteristics are stabilized without lowering Q of an oscillation circuit. SOLUTION: The oscillatory transducer comprises a tubular oscillator 1, a converter, and a self-oscillation circuit outputting a signal related to the resonance frequency of the tubular oscillator 1. Assuming the tubular oscillator 1 side serves as a detector A and the side including the oscillation circuit, a signal processing circuit, and the like, serves as a converter B, an explosion- proof converter B is employed and impedance of current limiting resistors R1-R4 being connected with the oscillator on the converter side is set at zero equivalently.
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