In many applications conductivity is crucial for process control, product monitoring, water monitoring, or leakage detection. Conductivity measurements are widely used in industrial and environmental applications as a simple and inexpensive way to control the ionic content in a solution. In water purification systems, the conductivity is monitored at different stages of the process. Since the mobility of the dissolved ions is affected by temperature, these monitoring systems are required to either control the process temperature or to compensate readings according to the sample temperature. Conductivity sensors and transmitters are used in many.
The sensor selection depends on the application and the conductivity range. To measure low conductivities in pure and ultrapure water, choose conductive sensors. Use toroidal sensors in media with high conductivity (e.g. milk, beer, bases, acids, brine) and apply 4-electrode sensors where a wide measuring range is required.
| Application requirement | Measurement range | Installation requirement | Pipe size and material |
| Hazardous location requirements | Conductivity system specification | Performance requirement | |
| Fluid particles presence | Viscosity of fluids | Chemical compatibility of all wetted parts to process chemicals |
| Food & Beverage | Chemicals | Water | Life sciences | Pharma | Power |