| 摘要 |
PCT No. PCT/EP89/00517 Sec. 371 Date Jan. 8, 1990 Sec. 102(e) Date Jan. 8, 1990 PCT Filed May 10, 1989 PCT Pub. No. WO89/11084 PCT Pub. Date Nov. 16, 1989.The mass flow meter operating by the Coriolis principle comprises a mechanical oscillating system having at least one measuring tube and an optical sensor means for sensing the mechanical oscillations of the oscillating system. The optical sensor means includes a light transmitter, a light receiver and an optical waveguide means having two quartz or sapphire rods which transmit the light of the light transmitter to the light receiver, the transmitted light flux being influenced by the oscillations of the mechanical oscillating system. To increase the mechanical strength and to protect the quartz or sapphire rods against temperature influences and against chemically aggressive media, the quartz or sapphire rods are embedded in ceramic material or glass which, preferably, is further surrounded by a metal cladding.
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