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Calcium Hardness Checker® HC Calibration Check Set HI720-11


The Calcium Hardness Checker® HC Calibration Check Set - HI720-11 provides a simple solution to validating the Calcium Hardness Checker® HC - HI720. This high-quality set of standards is manufactured in our state-of-the-art facility and comes supplied with a Certificate of Analysis. The Certificate of Analysis provides the lot number, reference values and expiration date for traceability when certifying the Checker®HC.

  • Supplied with Certificate of Analysis
  • Standard value of 75 +/- 5 ppm nitrite @ 25°C
  • Reusable with long shelf life stability
More Information
Manufacturer Hanna Instruments
Solution Parameters Calcium
Hazardous No
Note Heated transport required during winter months.