Methods and apparatus for measuring electrical conductivity

Details Methods and apparatus for measuring electrical conductivity Methods and apparatus for measuring electrical conductivity

1980-11-10

1982-01-05

Tokar, Michael J.

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

324439, G01N 2742

Patent

active

043096603

ABSTRACT:
Methods and apparatus for measuring electrical conductivity particularly but not solely for use in detecting mastitis in individual quarters of a cow's udder employ the cyclical charge and discharge of a capacitor (C1) through liquid in a conductivity cell (9), the cycle reversing on the potential applied to the capacitor (C1) reading a high reference potential and a low reference potential by applying the reference potentials to terminals (10,15) or sensing leads (32,33) of electronic devices (VC1, VC2) or (31) to cause operation of switches (SW1SW2) or (S1, S2) so that the variations in frequency are indications of conductivity of the cell (9). In one modification a reference conductance (30) is included in the circuit during charging of the capacitor (31) and the rate of the time periods of the cycle gives an indication of the conductance of the cell (9) in terms of the reference conductance (30).

REFERENCES:
patent: 4160946 (1979-07-01), Frigate

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