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Conductivity is the measure of the ability of a solution to carry an electric current. Resistivity is the reciporcal of conductivity. Any solutions containing water will conduct electricity to some extent.

Conductivity is a non-specific measurement, it only tells us how much current can be carried by the solution. The addition of electrolytes such as salts, acids or bases to pure water will increase the ability of the liquid to conduct electricity. The simple chemical principle of conductivity is the basis for all measurement applications using conductivity.
Applications in conductivity measuring include water analysis, dairies, filter washing, rinsing and cleaning baths, electric varnishing, sewage disposal, boiler condensate control, chemical concentration control, solvent/water sepαrator etc.
We offer conventional electrode and electrodeless sensors for most industrial applications.

E. Conductivity probes with two electrodes

MSS Series of Conductivity Cells

Graphite electrodes
Epoxy body
3/4" NPT CPVC or SS compression fitting
Economically priced
Automatic temperature compensation
Adjustable insertion depth
Constants from 0.01 to 50
Sanitary and Hot Tap versions available
A conductivity system is only as good as the sensor or cell which provides the signal to the analyzer or controller. In addition to the standard line, all types are available for high temperature applications.
AMS Series of Conductivity Cells

Stainless Steel electrodes and body
Teflon Insulators
PVDF or SS compression fitting
Automatic temperature compensation
Adjustable or fixed insertion styles available
Constants from 0.01 to 50
Sanitary and high temp. versions available
AM series cells are made with stainless steel electrodes and body. This insures that, with reasonable maintenance, years of drift-free performance can be expected.
Cell constants are available from 0.01 to 50.

3422 - variable insertion with PVDF or SS compression fitting
3444 - boiler/condensate (high temperature) construction
3455 - sanitary flange fitting
In-line E.Conductivity probe
Applications:from 0 to 2 mS
Cell constant: K=1
SI 301 Body: PVC2
Electrodes: 316 S.Steel
Thread: 1” BSP
Operating Temperature: 40 °C max.
Operating Pressure: 3 bar max. at 25 °C
Option: non standard materials and cell constant.
In-line E.Conductivity probe
Applications:from 0 to 2 mS
Cell constant: K=1
SI 3013 Body: Polypropilene
2 Electrodes: 316 S.Steel
Thread: 1” BSP
Operating Temperature: 50 °C max.
Operating Pressure: 3 bar max. at 25 °C
Option: non standard materials and cell constant.

Toroidal Electrodeless Conductivity sensor/transmitter

ECS series electrodeless conductivity sensors are used in processes where conventional contacting sensors may become fouled or corroded.
Each sensor comes standard with a PT1000 RTD temperature device, which provides temperature compensation to 25°C (77°F).
The ECS sensors can be mounted in flow through applications or submersion mounted in tanks or open vessels.
The terms Electrodeless and Toroidal are interchangeable in regards to this type of conductivity sensor.

Operating Principle:
Toroidal conductivity sensors are made up of two-wire wound Toroids encapsulated in a pot-ting compound and encased in a plastic body. One toroid acts as a transmitter and the other as a receiver. An electric current is induced between the toroids through the process solution. This current is directly proportional to the conductivity of the process solution.


• Low Maintenance -Reduced cleaning requirements
• No electrode corrosion -Toroids fully encapsulated
• One Wetted Material - Easier chemical compatibility
• Wide Measuring range • Automatic Temperature Compensation
Plating High purity water applications
Pharmaceutical Applications
Reverse Osmosis systems Fume Scrubbers
Cooling Towers
Textile Manufacturing
Food and Beverage

Technical Data
Wetted Materials: Talc reinforced blocked-copolymer Polypropylene, UV protected
Measuring Range: 0-200µS to 0-2S; Exact ranges and measurement accuracy are determined by the instruments, and values below 500µS are subject to increased error percentages due to zero offset and noise.
Temperature Compensator : Pt 1000 RTD, Class B
Operating Temp. Range : -10 to 105°C (sensor only, not mounting hardware)
Pressure/Temperature Limits: 105 psi at 105°C
Maximum Flow Rate: 10 ft (3 m)/sec
Sensor Cable: 3 shielded pairs plus 2 isolated shields with enhanced PVC jack-et rated to 105°C continuous; 20 ft (6 m) long, stripped and tinned instrument connection ends.
Process Connection: 3/4” MNPT at cable end of sensor