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℃
