Conductivity Meter | Water Conductivity Test | RS
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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)

    20 產品顯示為 Conductivity Meters

    • RS庫存編號 123-8777
    HK$2,473.93
    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庫存編號 205-0958
    HK$3,361.80
    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庫存編號 218-992
    • 製造零件編號 HI-98303
    HK$1,027.01
    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庫存編號 219-002
    • 製造零件編號 HI-98304
    HK$781.50
    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庫存編號 434-2370
    • 製造零件編號 HI-98311
    HK$2,042.06
    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庫存編號 434-2386
    • 製造零件編號 HI98312
    HK$1,679.08
    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庫存編號 457-0626
    • 製造零件編號 HI98304
    HK$757.10
    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庫存編號 219-428
    • 製造零件編號 HI-98308
    HK$1,167.80
    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庫存編號 615-3251
    • 製造零件編號 HI99300
    HK$2,683.40
    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庫存編號 195-0937
    • 製造零件編號 P01710020
    HK$10,181.30
    Chauvin Arnoux
    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庫存編號 901-0116
    • 製造零件編號 198844001
    HK$6,084.85
    Georg Fischer
    10mS/cm
    10µS/cm
    ±2 %
    -
    -
    -
    -
    -
    -
    -
    152mm
    -
    • RS庫存編號 288-2301
    • 製造零件編號 EC400
    HK$1,361.36
    Extech
    1999µS/cm
    200µS/cm
    ±2 %
    1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 288-0270
    • 製造零件編號 EC150
    HK$915.20
    Extech
    1999µS/cm
    0µS/cm
    ±1 %FS
    1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 615-3267
    • 製造零件編號 HI99301
    HK$2,877.51
    Hanna Instruments
    20mS/cm
    0mS/cm
    ±2 %
    0.01 mS/cm
    AAA
    500 h
    Battery
    143 x 80 x 38mm
    320g
    38mm
    143mm
    +60°C
    • RS庫存編號 386-8534
    • 製造零件編號 202924/10-0010-1003-105-37-88-26/000
    HK$4,101.30
    Jumo
    1mS/cm
    1µS/cm
    -
    -
    -
    -
    -
    -
    -
    143mm
    -
    -
    • RS庫存編號 327-5803
    • 製造零件編號 202924/10-0001-1003-105-37-88-26/000
    HK$4,536.08
    Jumo
    10µS/cm
    0.05µS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 901-0113
    • 製造零件編號 198844000
    HK$5,633.43
    Georg Fischer
    1000µS/cm
    1µS/cm
    ±2 %
    -
    -
    -
    -
    -
    -
    -
    152mm
    -
    • RS庫存編號 901-0104
    • 製造零件編號 198844010
    HK$5,746.10
    Georg Fischer
    100µS/cm
    0.055µS/cm
    ±2 %
    -
    -
    -
    -
    -
    -
    -
    152mm
    -
    • RS庫存編號 287-3808
    • 製造零件編號 EC500
    HK$2,047.76
    Extech
    19.99mS/cm
    2mS/cm
    ±2 %FS
    0.1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 102-466
    • 製造零件編號 EC210
    HK$2,235.88
    Extech
    2000µS/cm
    -
    ±2 %
    1 μS/cm
    -
    -
    -
    -
    -
    -
    -
    -
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