- Water & Aeration
- Hanna® 1500 PPM (Model 70442L) & 1413 uS/CM (Model HI 7031L) Calibration Solutions
TDS solution are produced with high-quality potassium chloride in various concentrations. They are standardized using a conductivity meter calibrated with NIST potassium chloride. The 1413 µS/cm solution is the one best suited for general use. This solution is also available in combination kits with the pH 7.01 buffer for the easy calibration of multiparameter instruments.