HM Digital C342 TDS and EC Calibration Solution - 342 ppm NaCl 3oz/89mL

HM Digital C342 TDS and EC Calibration Solution - 342 ppm NaCl 3oz/89mL

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For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.
The 342ppm Calibration Solution is designed for use with pure drinking water. The 1000ppm Calibration Solution is designed for use with beverages, aquariums and pools.