Conductivity Meters


Conductivity meters are devices for measuring the electrical conductivity in a solution. Distilled water is a poor electrical conductor and the substances or salts dissolved in the water determine how conductive the solution will be, as the number of dissolved ions increases, so does the solution’s ability to carry an electrical charge. This electrical charge is what allows a conductivity meter to measure the conductance of a solution.
How do they work?
A conductivity meter consists of a probe that measures conductivity. A small electrical current flows between two electrodes set a certain distance apart, usually around 1 cm. If there is a high concentration of ions in the solution, the conductance is high, resulting in a fast current. The electrical current is slower and gives a smaller reading when a lower concentration of ions is present.
They are commonly used in hydroponics, aquaculture and freshwater systems to monitor the number of nutrients, salts or impurities in the water. Conductivity meters must be calibrated to provide accurate results.
Advantages
• Available as a controller or an analyser to be implemented in process situations
• Able to make a sampling measurement in less than one second
Disadvantages
• Cannot distinguish between different types of ions
• Conductivity meters are temperature dependent, conductance increases approximately 2% per °C
• Does not measure the number of ions in a solution directly
Uses
• Agriculture to measure the salinity levels of surface water and of soil samples
• Wastewater treatment facility to measure the quality of water
• Water conditioning (softener, demineralisation, aquariums, pollution control)

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Viewing 1 - 19 of 19 products
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Description Price Maximum Conductivity Minimum Conductivity Best Accuracy Resolution Battery Type Battery Life Power Source Dimensions Weight Height Length Maximum Temperature Compensation Maximum Operating Temperature Minimum Operating Temperature
RS Stock No. 123-8777
BrandRS PRO
£164.60
Each
Units
19.99 mS/cm, 199.9 μS/cm 0.1 μS/cm, 0.2 mS/cm ±2 % 0.1 μS/cm, 0.01 mS/cm 9V, PP3 - Battery 72 x 32 x 180mm - 180mm 72mm - - -
RS Stock No. 434-2370
Mfr. Part No.HI98311
£125.00
Each
Units
3999µS/cm 0µS/cm - - Button Cell (1.5 V) x 4 100 h Battery 163 x 40 x 26mm 100g 26mm 163mm - +50°C 0°C
RS Stock No. 218-992
Mfr. Part No.HI98303
£64.00
Each
Units
1999µS/cm - ±2 % 1 μS/cm Button Cell (1.5 V) x 4 200 h Battery 175 x 41 x 23mm 95g 23mm 175mm +50°C +50°C 0°C
RS Stock No. 219-428
Mfr. Part No.HI-98308
£92.00
Each
Units
99µS/cm 0µS/cm ±2 % 0.1 μS/cm Button Cell (1.5 V) x 4 250 h Battery 175 x 41 x 23mm 95g 23mm 175mm +50°C +50°C 0°C
RS Stock No. 434-2386
Mfr. Part No.HI98312
£125.00
Each
Units
20mS/cm 0mS/cm ±2 % 0.01 mS/cm Button Cell (1.5 V) x 4 100 h Battery 163 x 40 x 26mm 100g 26mm 163mm - +50°C 0°C
RS Stock No. 615-3251
Mfr. Part No.HI99300
£225.00
Each
Units
3999µS/cm 0µS/cm ±2 % 1 μS/cm AAA 500 h Battery 143 x 80 x 38mm 320g 38mm 143mm +60°C +50°C 0°C
RS Stock No. 375-1852
Mfr. Part No.PRIMO5
£45.00
Each
Units
1999µS/cm 0µS/cm ±2 % 1 μS/cm Button Cell (1.5 V) x 2 200 h Battery 180 x 50 x 25mm 50g 25mm 180mm +60°C +50°C 0°C
RS Stock No. 615-3267
Mfr. Part No.HI99301
£225.00
Each
Units
20mS/cm 0mS/cm ±2 % 0.01 mS/cm AAA 500 h Battery 143 x 80 x 38mm 320g 38mm 143mm +60°C +50°C 0°C
RS Stock No. 288-8177
Mfr. Part No.HI-98201
£120.00
Each
Units
- - - - Button Cell (1.5 V) x 4 700 h Battery 175 x 41 x 23mm 95g 23mm 175mm - +50°C 0°C
RS Stock No. 219-002
Mfr. Part No.HI-98304
£64.00
Each
Units
19.99mS/cm - ±2 % 0.01 mS/cm Button Cell (1.5 V) x 4 200 h Battery 175 x 41 x 23mm 95g 23mm 175mm +50°C +50°C 0°C
RS Stock No. 457-0626
Mfr. Part No.HI 98304
£44.19
Each
Units
19.99mS/cm - ±2 % 0.01 mS/cm Button Cell (1.5 V) x 4 200 h Battery 175 x 41 x 23mm 95g 23mm 175mm +50°C +50°C 0°C
RS Stock No. 386-8534
Mfr. Part No.202924/10-0010-1003-105-37-88-26/000
BrandJumo
£326.60
Each
Units
1mS/cm 1mS/cm - - - - - - - 143mm - - +200°C -
RS Stock No. 327-5803
Mfr. Part No.202924/10-0001-1003-105-37-88-26/000
BrandJumo
£326.60
Each
Units
10µS/cm 0.5µS/cm - - - - - - - - - - +200°C -
RS Stock No. 314-4709
Mfr. Part No.HI983307-02
£95.00
Each
Units
9.99mS/cm 0mS/cm ±2 % 0.01 mS/cm - - Mains 86 x 110 x 43mm 215g 43mm 86mm +50°C +50°C 0°C
RS Stock No. 901-0110
Mfr. Part No.159001699
£168.78
Each
Units
- - - - - - Battery - - - - - - -
RS Stock No. 901-0104
Mfr. Part No.198844010
£405.72
Each
Units
- - ±2 % - - - - - - - 152mm - - -
RS Stock No. 901-0116
Mfr. Part No.198844001
£241.55
Each
Units
- - ±2 % - - - - - - - 152mm - - -
RS Stock No. 901-0113
Mfr. Part No.198844000
£414.00
Each
Units
- - ±2 % - - - - - - - 152mm - - -
New
RS Stock No. 195-0937
Mfr. Part No.CA 10141
£608.30
Each
Units
500mS/cm 0.05µS/cm - 0.001 → 0.1 μS/cm AA Alkaline 300 h Battery 54 x 127 x 211mm 600g 211mm 54mm +120°C +120°C -10°C
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