HI781-11 Marine Nitrate Low Range Checker® HC Calibration Check Set provides a simple solution to validating the performance of the HI781 Marine Nitrate Low Range Checker HC (Handheld Colorimeter). 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 to provide traceability when certifying the Checker HC.

• Pre-tinted standard value
• Supplied with Certificate of Analysis
• Reusable with a long shelf-life