HI780-11 Marine pH Checker® HC Calibration Check Set provides a simple solution to validating the performance of the HI780 Marine pH Checker HC (Handheld Colorimeter). This high-quality set of standards is supplied with a Certificate of Analysis that provides the lot number, reference values, and expiration date to provide traceability when certifying the Checker HC.

• Pre-tinted standard value

• Supplied with Certificate of Analysis

• Reusable with a long shelf-life