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Conductivity sensor measures concentration of ions in an electrolyte

Mon, 06/21/2010 - 9:45am


conductivity sensorIST has employed thin film technology to develop a conductivity sensor for measuring the concentration of ions in an electrolyte. By measuring the voltage drop between two current electrodes, the conductivity of a substance can be determined. The operating temperature range of the sensor is 0°C to +90°C, and its measurement range is ~5?S/cm to ~20mS/cm.

Temperature Compensation
The conductivity sensor developed by IST consists of two current electrodes, two measuring electrodes and a platinum temperature sensor for compensation. The sensor has an integrated class B 100? or 1000? temperature sensor. Since the conductivity of an electrolyte depends heavily on the temperature of the medium, it is important to have accurate temperature compensation. The platinum RTD is located on the sensor, directly at the point of measurement to assure accuracy.

Applications in Water Quality
Conductivity sensors have an important application in determining water quality, measuring the concentration of ions found in the water. IST’s conductivity sensor is ideal for this application as well as other applications to measure the conductivity of an electrolyte. The sensors are able to measure the conductivity of most electrolytes, excluding those that are volatile to platinum.



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