Conductivity Sensors

  • SC42

    Contacting Conductivity Sensors SC42/SC4A

    Why measure Conductivity?

    It can be used as a fairly inexpensive and low maintenance indicator of water quality.  Good quality water with little contaminants will have a low conductivity.  There is far less maintenance than pH and minimal calibration. Conductivity is used in Boiler feedwater, RO, and Demineralizer applications.

    Since conductivity, up to a point, increases with an increase in the concentration of the ions in the process, we can use it to correlate to a % concentration value of solutions such as acids or bases.  Again, since conductivity is non-specific, % concentration can only be measured on ONE chemical at a time and not a mixture of contributing chemicals.

    There are two basic sensor styles used for measuring Conductivity: Contacting and Inductive (Toroidal, Electrodeless).

    When Contacting Sensors are used, the conductivity is measured by applying an alternating electrical current to the sensor electrodes (that together make up the cell constant) immersed in a solution and measuring the resulting voltage. The solution acts as the electrical conductor between the sensor electrodes.

    The accuracy of conductivity measurements can be influenced by the following factors:

    • Polarization.
    • Contamination: Deposits or coating on the electrode surface of a 2-pole cell have a similar effect to polarization errors, i.e. the conductivity reading is lower than usual. These effects can also be prevented with a 4-pole conductivity cell.
    • Cable resistance: The cable resistance can induce error in the measurement and must be taken into account.
    • Temperature: Conductivity measurements are temperature dependent, if the temperature increases, conductivity increases.

  • product_Conducell-Mix-165

    Hamilton Conducell sensors for biotech and pharmaceutical industry

    Yokogawa’s SC450G and FLXA21 have proven to work very well over a wide range of conductivity values with suitable 4-electrode sensors. The Hamilton CONDUCELL 4US sensors for Triclover and INGOLD process connections has often been successfully used where the access …

  • conductivity_sensors_product_ISC40

    High Conductivity Sensors ISC40/SC42

    There are two basic sensor styles used for measuring Conductivity: Contacting and Inductive (Toroidal, Electrodeless).

    When Contacting Sensors are used, the conductivity is measured by applying an alternating electrical current to the sensor electrodes (that together make up the cell constant) immersed in a solution and measuring the resulting voltage. The solution acts as the electrical conductor between the sensor electrodes.

    With Inductive Conductivity (also called Toroidal or Electrodeless), the sensing elements (electrode coils) of an inductive sensor do not come in direct contact with the process. These two matched (identical) coils are encapsulated in PEEK (or Teflon) protecting them from the adverse effects of the process.

    There is only one cell factor (constant) for the ISC40 Inductive Sensor. It covers nearly the entire conductivity measurement range ~ 50-2,000,000 µS/cm. Only on the low end (below 50 µS) does the accuracy of the sensor suffer.

    Because the ISC40 Inductive sensor is virtually maintenance free; it is the first choice for any application. If the ISC40 cannot be used then it is recommended to use the 4-electrode design, model SC42 large bore sensor.

  • ISC40

    ISC40 Inductive Conductivity Sensor

    The model ISC40 sensors are designed for use with the EXA ISC analyzers. This combination exceeds all expectations for conductivity measurement in terms of reliability, accuracy, rangeability and price performance. Training Videos: Sanitary Fitting Installation