Checker® HC – HI755-11 Seawater Alkalinity Photometer Calibration Solutions provide a simple solution to validate the Checker® HC – HI755 Seawater Alkalinity Photometer which has a range of 0 to 300ppm CaCO3. This high-quality set of standards is manufactured in our state-of-the-art facilities and comes complete with a Certificate of Analysis. The Certificate of Analysis provides the lot number, reference values and expiry date for traceability when certifying the Checker®HC photometer.

pH 10.01 standard solution for calibrating pH meters.

pH 4.01 standard solution for calibrating pH meters.

pH 7.01 standard solution for calibrating pH meters.

230ml bottle of pH 7.01 buffer solution for calibrating pH meters.

500ml bottle of pH 7.01 buffer solution for calibrating pH meters.

Hanna Instruments 1382 mg/L TDS Calibration Solution .