The relationship between conductivity and resistivity

Resistivity: is a physical quantity used to represent the resistance characteristics of various substances
.

The resistance of a wire made of a certain material with a length of 1 meter and a cross-sectional area of 1 square millimeter is called the resistivity
of this material.

In the international system, the resistivity is ohm meter, commonly used is ohm square millimeter / meter
.

Conductivity: The conductivity of water is the reciprocal of the resistance of water, which is usually used to express the purity of water
.

Conductivity is the ability of an object to
conduct current.

The measurement principle of the conductivity measuring instrument is to put two parallel plates into the solution under test, add a certain potential (usually the sine wave voltage) at both ends of the plate, and then measure the current
flowing between the plates.

According to Ohm's Law, the conductivity (G)-the reciprocal of resistance (R) is determined by voltage and current
.

The basic conductivity is Siemens (S), originally called mohm, taking the meaning of
resistance ohm reciprocal.

Because the geometry of the conductivity cell affects the conductivity value, the standard measurement is expressed in conductivity S/cm to compensate for the difference caused
by various electrode sizes.

Conductivity (C) is simply the product of the measured conductivity (G) and the cell constant (L/A).
Here L is the length of the liquid column between the two plates, and A is the area
of the plate.

=ρl=l/σ (1) defines or interprets the reciprocal of resistivity as conductivity
.

σ=1/ρ (2): In international systems, the conductivity is Siemens/meter
.

(3) Description The physical meaning of conductivity is to indicate the conductive properties of
substances.

The higher the conductivity, the stronger the conductivity, and vice versa
.

Today, we recommend the conductivity analyzer of Shanghai Botu Instrument