EC/ TDS Solutions


Produced with high-quality potassium chloride in various concentrations, HANNA TDS Calibration Solution ensure maximum accuracy for conductivity meters and probes. They are standardized using a conductivity meter calibrated with NIST potassium chloride.

HI 70442 – 1500 PPM
HI 7032 – 1382 PPM
HI 7031 – 413 μS/cm

Available separately in 230 ml bottles.

Grower’s Tip:
Electrical Conductivity is defined by the ability of a liquid to conduct an electrical current. Total Dissolved Solids are the amount of minerals, salts or metals dissolved in water. In hydroponics, both measures are used to determine the strength of your nutrients.