Working and types of conductivity meters that you can use

Working and types of conductivity meters that you can use

A Conductivity Meter measures the electrical current or conductance in an aqueous solution basically by measuring the number of movable ions present. In Conductivity Meters, small electrodes are kept within a centimeter and high current flow is measured.

How does it look: The structure of Conductivity Meter mainly consists of a probe. Sometimes calibrations are given for more clarity to measure the TDS that is totally dissolved solids in the solution. In a Conductivity Meter, conductance is measured in Siemens per meter or parts per million.

Working In case of distilled waters, the conductance is very poor. The amount of solids and salts dissolved in the water increases the number of dissolved ions. The increase in number of ions increases the transmission of electric charge. The Conductivity meter determines this to measure the conductance of the solutions. The temperature is very important so every device should have the temperature control. These are of two types ones that are small pocket sized for simple uses and other larger ones that are used for complex industrial control systems. The analyzing circuit creates an AC voltage which measures the signal. Conductivity itself has large temperature coefficient and it has thus a modifier that brings it back to room temperature. Adding of salts and other unwanted materials increase conductance.

Contracting type conductivity meters They have two electrodes which are insulated into one another. The electrodes are made of 316 stainless-steel, titanium-palladium alloy or graphite. They have a particular size and spacing too.

The cell constant is mostly 1.0.

Electrode less type conductivity meters It measures by inducing alternate current in loops in the electrodes ingested in the solutions. The AC signal flows through the Toroid A. The Toroid B senses the magnitude of the current flowing and corresponding readings are displayed.

Applications It is used in Agricultural sectors to measure the salinity of soil and surface waters. It is also used in Water treatment plants to differentiate between distilled and non-distilled water and sometimes for assessing the chemical solutions.

Prices The researchers include a lot of modifications in the Conductivity Meters that might bring in different prices for each of the meters. It might range from 7000 to 8000 rupees.

Advantages It is quite dependable and reliable for use. Also the working is pretty simple and easy enough to calibrate. It can be used for a wide variety of temperature and pressure ranges and the sensor materials are quite affordable. It mainly depends on ignitable solutions for usage which is easy to measure by constructing electrodes between the solutions.

Disadvantages In case of Conductivity meters a lot of interferences might be observed and sometimes it’s not specific. Its temperature dependency is a major problem. In some chemical solutions, at certain intervals the temperature of solutions keeps on changing due to the reactions. This might pose a threat to the set up as it might give faulty calibrations sometimes. But currently researchers are working on modifications that can make the readings more accurate.

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