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Conductivity transmitters are used to measure electrical conductivity in the food, chemical, pharmaceutical, water and energy industries. Pure water is a poor conductor of electricity, but the addition of ions from dissolved salts and inorganic materials such as bases, chlorides, sulfides, and carbonate compounds increases the conductivity of the sample, making conductivity an important measurement of water quality.
Conductivity transmitters are equipped with a probe for field measurements. When the probe is placed in a liquid to be measured, the transmitter activates a voltage between the two electrodes of the probe, creating an electrical resistance that causes the voltage to drop. It is then read by the meter.
