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Splash of Water.webp

90ml of NaCl solution 342 PPM / ~700uS/cm @ 25°C used to periodically calibrate TDS meters.


Store out of the heat and sun and in a cool place.


It is best to pour the required amount of TDS calibration solution into a clean container (rinse the container with distilled water for best results) to prevent contaminating the bottle.

TDS Calibration solution


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