Conductivity Sensor | Conductivity Probe | Conductivity Electrode
 
Menu

Conductivity Sensor | Conductivity Probe

Conductivity Sensors for Process and Pure Water Measurement

A conductivity sensor measures the ability of a solution to conduct an electrical current. It is the presence of ions in a solution that allow the solution to be conductive: the greater the concentration of ions, the greater the conductivity. METTLER TOLEDO in-line conductivity probes are designed for pure water monitoring, chemical processing and pharmaceutical manufacturing processes. These conductivity sensors offer accurate, reliable measurement to ensure process control and compliance.

+32 3 250 15 70
Call Service
Uptime
Support & Repair
Compliance
Calibration & Quality
Expertise
Training & Consulting

FAQs

What is a conductivity sensor?

A conductivity sensor, also known as a conductivity probe or an in-line conductivity electrode, is an analytical instrument that measures the ability of a solution to conduct an electrical current. It is the presence of ions in a solution that allow the solution to be conductive: the greater the concentration of ions, the greater the conductivity. In some applications the purity measurement is made as resistivity (the reciprocal of conductivity). 

How many types of conductivity sensors are there?

There are three technology types of METTLER TOLEDO conductivity probes used for process conductivity measurement:

  • 2-electrode conductivity sensor
  • 4-electrode conductivity sensor
  • Inductive conductivity sensor
How do you calibrate a conductivity sensor?

A  METTLER TOLEDO conductivity sensor can be calibrated against a solution of known conductivity (much like calibrating a pH sensor against a solution of a known pH). Alternatively, an in-line conductivity probe that contains a range of very precise resistors that duplicate known conductivity measurements can be used.

When do you need to perform a conductivity sensor calibration or verification?

In general, the cell constant of the in-line conductivity electrode will not change; however, if the sensing elements are altered in some way (e.g. solid deposition or other fouling of the electrodes or insulator of the sensor, loss of electrode material through corrosion) the cell constant will change. METTLER TOLEDO conductivity sensors are factory calibrated and the cell constant is precisely determined. Therefore, calibration is typically not required while using the in-line conductivity sensor. However, it is recommended to verify the conductivity sensor or make calibration adjustment if necessary on an annual basis. The frequency of verification or calibration is very much dependent on the applications or on the plant standard operating procedure requirements.

Does temperature affect conductivity measurement?

Conductivity is strongly temperature dependent. As the temperature of a sample increases, the viscosity of the sample decreases which leads to increased mobility of the ions. Therefore, the observed conductivity of the sample also increases even though the ion concentrations may remain constant.

In good practices, every conductivity sensor result must be specified with a temperature or be temperature compensated, usually to the industry standard of 25 degrees Celsius. 

Thank you for visiting www.mt.com. We have tried to optimize your experience while on the site, but we noticed that you are using an older version of a web browser. We would like to let you know that some features on the site may not be available or may not work as nicely as they would on a newer browser version. If you would like to take full advantage of the site, please update your web browser to help improve your experience while browsing www.mt.com.