Let’s Discuss Conductivity Sensors Varieties
In industrial applications, conductivity sensors are used to measure a liquid or chemical’s electrical conductivity. They operate by introducing an electrical current into the liquid or chemical and gauging its resistance to the current. It is possible to gauge the purity, potency, or concentration of a liquid or chemical by looking at its conductivity, which is directly proportional to the concentration of dissolved ions in the substance.
Conductivity sensors come in both touch and non-contact varieties.
Contact conductivity sensors: These sensors are in close proximity to the liquid or chemical being measured, and they use an electrical current to determine the conductivity of the substance. Between two electrodes that are in direct touch with the liquid or chemical, current flows. The conductivity of the liquid or chemical is calculated by the measurement of its resistance. These sensors are often less expensive than non-contact ones and can be used with conductive liquids or chemicals.
Non-contact conductivity sensors: These sensors assess a liquid’s or chemical’s conductivity without coming into touch with the substance being measured. To determine the liquid or chemical’s conductivity, they use electromagnetic waves. The liquid or chemical acts as a conductor for electromagnetic waves, and the amount of energy it absorbs determines its conductivity. These sensors are often more expensive than contact sensors and can be used with non-conductive liquids or chemicals.
A control system can be connected to conductivity sensors using a number of different communication protocols, including 4-20 mA, HART, Modbus, Profibus, etc. Additionally, they have cutting-edge features like temperature compensation and self-diagnostics that make precise measurement possible even under difficult conditions.
While conductivity sensors can be used in a variety of applications, it’s vital to keep in mind that some liquids and chemicals—such as those that are excessively viscous or have a lot of suspended solids—may not be compatible with them. A professional should always be consulted to help you choose the finest sensor for your unique requirements.
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