Calcium Hardness CAL Check Standards

The HI96720-11 Calcium Hardness CAL Check™ Standards provide a simple solution to calibrating and validating the compatible HI96720 portable photometer. 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 HI96720 photometer.

Supplied with Certificate of Analysis
Standard value of 1.50 ±0.07 mg/L CaCO3 @ 25°C
Reusable with long shelf life stability


HI96720-11 is a high quality set of calibration standards that allows users to validate and calibrate the calcium hardness range found in the compatible HI96720 portable photometer that has a 0.00 to 2.70 mg/L (ppm) CaCO3 range. The HI96720-11 includes one sealed ìAî cuvette for zeroing the meter and one ìBî cuvette that is used to validate or calibrate. The expected reading from the ìBî standard is 1.50 ±0.07 mg/L CaCO3 @ 25°C. The calibration set is produced in our state-of-the-art manufacturing facility using reagent grade chemicals in a temperature controlled environment.

Supplied with Certificate of Analysis
Product code
Lot number
Expiration date
Standard value @ 25°C
Reference meter NIST traceable
Provided storage containers
Light tight
Protects from accidental breakage

Validation and calibration of the calcium hardness range for the HI96720 portable photometer is quick and easy with the HI96720-11 CAL Check™ Standards.

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