BBP Operations Status: Click Here to View

Conductivity Sensors

Featured Solutions

  • SC4501

    The model ISC40 sensors are designed for use with our 2-wire analyzers and 4-wire analyzers. This combination exceeds all expectations for conductivity measurement in terms of reliability, accuracy, rangeability and price performance. The accuracy is 0.5% of reading plus 0.5 uS/cm for any conductivity value _ regardless if it is measured in rinse water or concentrated acids. Theses sensors are guaranteed to have a long life, even under harsh industrial conditions:

    – The erosion/abrasion resistant PEEK (Poly Ether Ether Ketone), which also features excellent chemical resistance in all solutions except fluoric acid or oxidizing concentrated acids.
    – The ultimate material in terms of chemical resistance: PFA for applications in hydrofluoric acid and oxidizing concentrated acids (nitric, sulfuric, oleum).

    The sensor is provided with a rugged Stainless Steel mounting thread, nut and gasket combination for ultimate flexibility in installation using bulk head installation technique. There is also a wide range of holders and options available for reliable in-line or off-line installation with double O-ring seals for long service life of the sensor. Additional models are available for use in Ball-Valve Insertion applications and in Sanitary Flange installations.

    The ISC40G and ISC40S are available in PEEK (sensor type GG) for general use. In applications where sample is aggressive to Peek we offer the sensor in PFA (sensor type TG).

    Both sensors have a large bore for optimal resistance to fouling processes and when properly installed, the flow will keep the sensor clean preventing measuring errors.

    Features and Applications of the ISC40
    • Inductive Conductivity technique for elimination of fouling and polarization errors.
    • Wide bore sensors for long term stability.
    • Installation flexibility by wide range of holders and by the use of universal bulkhead construction.
    • Wide rangeability in terms of conductivity (1 µS/cm to 2 S/cm) and temperature (-20 to 130ºC).
    • All ranges except the (ultra) pure water applications.
    • All slurry applications where conventional systems suffer from plugging or erosion.

    Learn about other Conductivity Sensors available at BBP here.

  • Conductivity Sensors SC42/SC4A(J)

    The SC42/SC4A is a contacting conductivity sensor that measures conductivity by applying an alternating electrical current to the sensor electrodes (that together make up the cell constant) while immersed in a solution and measuring the resulting voltage. The solution acts as the electrical conductor between the sensor electrodes.

    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.

    Learn about other Conductivity Sensors like the SC42/SC4A available at BBP here.

  • Conductivity Sensors SC42/SC4A(J)

    The SC42/SX42 is a high pressure, high temperature contacting conductivity sensor primarily designed for boiler blowdown and condensate leak detection applications. These conductivity cells have extremely high temperature and pressure ratings: the threaded types can handle 16 bar at 200°C and the flanged types can handle 40 bar at 250°C.

    Model SC42 small-bore conductivity sensors have a stainless steel body, PEEK insulation, and an integral junction box, especially designed to withstand both high temperatures and pressures. These rugged sensors can deliver accurate, repeatable conductivity measurements in temperatures up to 200°C and withstand pressures up to 400 PSIG. To ensure accurate temperature compensation, a platinum 1000 temperature element is standard. The sensor is double-sealed with EPR o-rings for maximum protection from the hostile environment for which these sensors are designed.

    Features of the SC42:

    • Rugged 316 stainless steel construction with PEEK insulation
    • Integral junction box for installation and maintenance ease
    • Standard 3/4” MNPT process connection
    • Platinum 1000 temperature compensation
    • Double EPR o-ring seals for maximum reliability


    • Automatic boiler blowdown control
    • Condensate monitoring
    • Leak detection on heat exchangers
    • Steam purity tracking

    These high temperature conductivity sensors have a stainless steel body and a ceramic insulation, especially designed to withstand high temperatures (up to 250°C) and pressures (up to 40 bar). A special treatment of the electrodes ensures optimal resistance against polarisation. The flanged model has an integral connection box, the threaded models are provided with a Amphenol connector to fit the Yokogawa WU40 cable or Variopin connector to fit with Yokogawa WU10/WE10-cable. All sensors have a pre-calibrated cell constant and a built-in temperature element for automatic temperature compensation. Sensors with the Variopin connector are equipped with an ID-chip in which callibration information is stored for easy setup when connected to a SENCOM Smart Adapter model SA11-C1. For metal sensors a 3.1 material certificate is included. The sensors, except those equipped with Variopin connector, are ATEX certified for installation in zone 0 environments when connected to a certified intrinsically safe Yokogawa analyser, model SC202S or FLXA21 or a certified intrinsically safe circuit with defined output parameters. The combination of the sensor plug and cable is watertight and can handle temperatures upto 100°C. The aluminium connection box of the flanged types has been selected to have a easy connection with high temperature cabling.

    Features of the SX42:

    • High temperature and pressure ratings
    • Built-in temperature resistor: Pt1000
    • Fast temperature response
    • Plug and cable form a water tight connection to IP67
    • Model with flange has an integral connection box
    • Threaded models have standardized connections 1” NPT or R1
    • Selection of two cell constant 0.10 cm-1 or 0.01 cm-1
    • Sensor with 8 pin Variopin with ID chip for SENCOM SA11-C1 use
    • ATEX/IECEx certified
    • Optimal resistance against polarisation

    Learn about other Conductivity Sensors like the SC42/SX42 available at BBP here.


Sales Inquiries & Customer Support

(800) 299-4142