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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Beskrivning Pris Maximum Conductivity Minimum Conductivity Best Accuracy Resolution Battery Type Battery Life Power Source Dimensions Weight Height Length Maximum Temperature Compensation
RS-artikelnummer 123-8777
VarumärkeRS PRO
2 145,20 kr
Each
Enheter
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-artikelnummer 205-0958
VarumärkeRS PRO
3 072,41 kr
Each
Enheter
2000µS/cm 1µS/cm ±0.5 % 0 μS/cm AA >1000 hrs Battery 108 x 54 x 28mm 200g 108mm 54mm -105 °C
RS-artikelnummer 434-2386
Tillv. art.nrHI98312
VarumärkeHanna Instruments
1 225,13 kr
Each
Enheter
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 -
RS-artikelnummer 434-2370
Tillv. art.nrHI98311
VarumärkeHanna Instruments
1 192,02 kr
Each
Enheter
3999µS/cm 0µS/cm - - Button Cell (1.5 V) x 4 100 h Battery 163 x 40 x 26mm 100g 26mm 163mm -
RS-artikelnummer 457-0626
Tillv. art.nrHI98303
VarumärkeHanna Instruments
613,89 kr
Each
Enheter
19.99mS/cm 1µS/cm ±2 % 0.01 mS/cm CR2032 200 h Battery 175 x 41 x 23mm 95g 23mm 175mm +50°C
RS-artikelnummer 219-428
Tillv. art.nrHI-98308
VarumärkeHanna Instruments
852,63 kr
Each
Enheter
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
RS-artikelnummer 386-8534
Tillv. art.nr202924/10-0010-1003-105-37-88-26/000
VarumärkeJumo
4 611,11 kr
Each
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1mS/cm 1mS/cm - - - - - - - 143mm - -
RS-artikelnummer 901-0113
Tillv. art.nr198844000
VarumärkeGeorg Fischer
7 981,15 kr
Each
Enheter
1000µS/cm 1µS/cm ±2 % - - - - - - - 152mm -
RS-artikelnummer 219-002
Tillv. art.nrHI-98304
VarumärkeHanna Instruments
613,89 kr
Each
Enheter
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
RS-artikelnummer 327-5803
Tillv. art.nr202924/10-0001-1003-105-37-88-26/000
VarumärkeJumo
4 589,79 kr
Each
Enheter
10µS/cm 0.5µS/cm - - - - - - - - - -
RS-artikelnummer 901-0104
Tillv. art.nr198844010
VarumärkeGeorg Fischer
7 047,94 kr
Each
Enheter
100µS/cm 0.055µS/cm ±2 % - - - - - - - 152mm -
RS-artikelnummer 615-3251
Tillv. art.nrHI991300
VarumärkeHanna Instruments
2 450,27 kr
Each
Enheter
3999µS/cm 0µS/cm ±2 % 1 μS/cm AAA 500 h Battery 143 x 80 x 38mm 320g 38mm 143mm +60°C
RS-artikelnummer 901-0110
Tillv. art.nr159001699
VarumärkeGeorg Fischer
2 921,08 kr
Each
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- - - - - - Battery - - - - -
RS-artikelnummer 288-8177
Tillv. art.nrHI-98201
VarumärkeHanna Instruments
1 273,26 kr
Each
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- - - - Button Cell (1.5 V) x 4 700 h Battery 175 x 41 x 23mm 95g 23mm 175mm -
RS-artikelnummer 615-3267
Tillv. art.nrHI99300
VarumärkeHanna Instruments
2 447,29 kr
Each
Enheter
20mS/cm 0mS/cm ±2 % 0.01 mS/cm AAA 500 h Battery 143 x 80 x 38mm 320g 38mm 143mm +60°C
RS-artikelnummer 901-0116
Tillv. art.nr198844001
VarumärkeGeorg Fischer
7 904,58 kr
Each
Enheter
10mS/cm 10µS/cm ±2 % - - - - - - - 152mm -
RS-artikelnummer 195-0937
Tillv. art.nrP01710020
VarumärkeChauvin Arnoux
8 936,43 kr
Each
Enheter
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
RS-artikelnummer 218-992
Tillv. art.nrHI98303
VarumärkeHanna Instruments
640,16 kr
Each
Enheter
1999µS/cm 0µS/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