Yes - there is a difference.
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​Calibrations: The sensors Infogrid uses in its solutions are calibrated by the OEM sensor vendor, and are calibrated to provide highly accurate data readings.
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​Offsets: is an additional data point which provides more data about your water conditions. The Infogrid solution takes highly accurate sensor temperature readings, and enhances the data to provide an estimate of the water conditions above and beyond the outside surface temperature of the pipe work.