Hanna calibration solution with a conductivity of 1413 µS/cm, for TDS and EC meters and pocket testers. Per 20 ml sachet, so you calibrate without risk of contamination.
With use, the measuring points of your TDS meter get contaminated. Calibrate your device in time to keep accurate readings: open the sachet and dip your meter in.
✓ 1413 µS/cm
✓ For TDS and EC meters and pocket testers
✓ 20 ml sachet, no contamination
