HI719-11 is a high-quality set of calibration standards that allows users to validate the Magnesium Hardness Checker®HC - HI719 . The HI719-11 includes one sealed cuvette for zero ppm CaCO₃ and one cuvette that is tinted to an equivalent 1.00 ± 0.20 ppm CaCO₃ sample @ 25^oC. The calibration check set is produced in our state-of-the-art manufacturing facility using reagent grade chemicals in a temperature controlled environment.

The HI719-11 is supplied with Certificate of Analysis

• Product code

• Lot number

• Expiration date