FLUID LEVEL RADIO WAVE PHASE GAGE Russian patent published in 2014 - IPC G01F23/284 

FIELD: instrumentation.

SUBSTANCE: proposed device comprises microwave fixed frequency microwave oscillator connected via first power divider, primary output of directed coupler and circulator to transceiver antenna for irradiation of electromagnetic waves towards the fluid surface and perpendicular thereto and receipt of reflected electromagnetic waves. Besides, device comprises 1^st mixer of radiated and received waves, its first and second inputs being connected to extra output of directed coupled and output of circulator via 2^nd power divider, 2^nd mixer, 1^st and 2^nd frequency N-factor dividers. Note here that 1^st and 2^nd inputs of second mixer are connected via 1^st and 2^nd frequency N-factor divider with second outputs of 1^st and 2^nd power divider while second mixer output is connected with computer.

EFFECT: higher precision.

1 dwg