公开(公告)号：US11061057B2

公开(公告)日：2021-07-13

申请号：US16312523

申请日：2017-08-10

Applicant: MultiPath Co., Ltd. ,  SEEMS BIONICS INC.

Inventor： Kyu Young Lee

IPC: G01R27/26 ,  G01N33/26 ,  G01N27/06

Abstract: Non-contact type measuring apparatus able to detect a difference in signal intensity by transmitting a radio frequency (RF) signal having a predetermined frequency through one of two coil antennas and receiving an induced RF current signal transmitted via a medium through the other coil antennas and detect conductivity and a variation in characteristic of a non-conductor by comparing the signal intensity with a signal intensity comparison table for each frequency, which is stored in a controller by measuring a signal intensity for each frequency in advance, on the basis of the signal intensity for each frequency. The non-contact type measuring apparatus can accurately measure not only various elements using a characteristic in which conductivity is varied according to total dissolved solid, temperature, and an amount of a conductive medium and permittivity change characteristic of a non-conductor, but also conductivity and variation in characteristic of the non-conductor.