1 sachet of 20ml of conductivity calibration solution 12.88 ms/cm by  Hanna .
Used to calibrate the EC of a solution at 12880µS/cm. The solution will have a standard conductivity calibrated with NIST 2202 SRM potassium chloride (reference standard) in deionized water for analysis, in accordance with ISO 3696 / BS3978.

Unopened bottle can be kept for 5 years from the date of manufacture

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