Hardness - Solutions(1)

The HI97735-11 Total Hardness CAL Check™ standards provide a simple solution to calibrating and validating the HI97735 Total Hardness EPA Portable Photometer that features three measurement ranges. The HI97735-11 CAL Check™ standards can be used for the low (0 to 250 mg/L CaCO3), medium (200 to 500 mg/L CaCO3), and high (400 to 750 mg/L CaCO3) ranges of total hardness determination. 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 HI97735 photometer.

• Supplied with Certificate of Analysis
• Standard value of 150 ±5 (low range), 350 ±7 (medium range), 520 ±10 (high range) mg/L CaCO3 @ 25℃
• Reusable with long shelf life stability