The HI97706-11 Phosphorus CAL Check™ Standards provide a simple solution to calibrating and validating the HI97706 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 compatible phosphorus photometer.
- Supplied with Certificate of Analysis
- Standard value of 7.5 ±0.3 mg/L phosphorus @ 25℃
- Reusable with long shelf life stability









