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    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)

    18 Products showing for Conductivity Meters

    • RS Stock No. 123-8777
    Each
    MYR1,809.32
    RS PRO
    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. 205-0958
    Each
    MYR2,506.80
    RS PRO
    2000 μS/cm, 20 mS/cm, 100mS/cm
    1µS/cm
    ±0.5 %
    1 μS/cm
    AA
    >1000 hrs
    Battery
    108 x 54 x 28mm
    200g
    108mm
    54mm
    -105 °C
    • RS Stock No. 615-3251
    • Mfr. Part No. HI99300
    Each
    MYR2,013.30
    Hanna Instruments
    3999µS/cm
    0µS/cm
    ±2 %
    1 μS/cm
    AAA
    500 h
    Battery
    143 x 80 x 38mm
    320g
    38mm
    143mm
    +60°C
    • RS Stock No. 901-0104
    • Mfr. Part No. 198844010
    Each
    MYR2,725.83
    Georg Fischer
    100µS/cm
    0.055µS/cm
    ±2 %
    -
    -
    -
    -
    -
    -
    -
    152mm
    -
    • RS Stock No. 901-0113
    • Mfr. Part No. 198844000
    Each
    MYR3,047.54
    Georg Fischer
    1000µS/cm
    1µS/cm
    ±2 %
    -
    -
    -
    -
    -
    -
    -
    152mm
    -
    • RS Stock No. 901-0116
    • Mfr. Part No. 198844001
    Each
    MYR3,271.86
    Georg Fischer
    10mS/cm
    10µS/cm
    ±2 %
    -
    -
    -
    -
    -
    -
    -
    152mm
    -
    • RS Stock No. 434-2370
    • Mfr. Part No. HI-98311
    Each
    MYR997.06
    Hanna Instruments
    3999µS/cm
    0µS/cm
    -
    1 μS/cm
    Button Cell (1.5 V) x 4
    100 h
    Battery
    163 x 40 x 26mm
    100g
    26mm
    163mm
    -
    • RS Stock No. 219-002
    • Mfr. Part No. HI-98304
    Each
    MYR675.83
    Hanna Instruments
    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 Stock No. 218-992
    • Mfr. Part No. HI-98303
    Each
    MYR542.68
    Hanna Instruments
    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
    • RS Stock No. 287-3808
    • Mfr. Part No. EC500
    Each
    MYR1,219.02
    Extech
    19.99mS/cm
    2mS/cm
    ±2 %FS
    0.1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    • RS Stock No. 386-8534
    • Mfr. Part No. 202924/10-0010-1003-105-37-88-26/000
    Each
    MYR1,502.87
    Jumo
    1mS/cm
    1µS/cm
    -
    -
    -
    -
    -
    -
    -
    143mm
    -
    -
    • RS Stock No. 327-5803
    • Mfr. Part No. 202924/10-0001-1003-105-37-88-26/000
    Each
    MYR1,388.15
    Jumo
    10µS/cm
    0.05µS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS Stock No. 219-428
    • Mfr. Part No. HI-98308
    Each
    MYR853.95
    Hanna Instruments
    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 Stock No. 457-0626
    • Mfr. Part No. HI98304
    Each
    MYR389.82
    Hanna Instruments
    19.99mS/cm
    1µS/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 Stock No. 434-2386
    • Mfr. Part No. HI98312
    Each
    MYR1,016.98
    Hanna Instruments
    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 Stock No. 288-0270
    • Mfr. Part No. EC150
    Each
    MYR553.35
    Extech
    1999µS/cm
    0µS/cm
    ±1 %FS
    1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    • RS Stock No. 288-2301
    • Mfr. Part No. EC400
    Each
    MYR735.35
    Extech
    1999µS/cm
    200µS/cm
    ±2 %
    1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    • RS Stock No. 102-466
    • Mfr. Part No. EC210
    Each
    MYR1,424.17
    Extech
    2000µS/cm
    -
    ±2 %
    1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
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