The Hydra, a convenient, hand-held, syringe-style meter for quick and accurate measurement of conductivity, pH and temperature of the water from your treatment system was designed primarily as a conductivity meter with the additional function of being able to display the conductivity reading as TDS (ppm or ppt). A customer recently asked how to calibrate TDS for their Hydra Meter.While similar in some ways, there is not a directly proportional relationship between Conductivity and TDS. Conductivity is a measurement that represents how much resistance the solution offers while TDS is a measurement of the dissolved solids that are present in the solution. This is determined in the same way, by measuring the solutions resistance. The difference lies in the interpretation of the data. Conductivity is just a straight resistance reading where TDS need to be determined by not only knowing the resistance of the solution being measured, but one must also know what the solids are that are dissolved in the solution.On the Technical Note “Conductivity vs. TDS measurements using the Hydra Water Quality Meter”, it states that the TDS values are calculated from the conductivity measurement. So, by calibrating the Conductivity of the Hydra Meter, the TDS is also being calibrated. A separate calibration of TDS is therefore not necessary. Read more about the Hydra Meter, start a conversation with your account manager and like us on Facebook today!
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