Calibration and cleaning solutions for freshwater aquarium

pH 7.01 standard solution for calibrating pH meters.

pH 4.01 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.

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.

Standard solutions for the HI774 device from Hanna Instruments . It allows you to check the correct operation of the device.

Seawater Nitrate Standard Solutions – HI781-11 provides a simple solution for checking the HI781 Seawater Nitrate Checker .

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 to ensure traceability when certifying the Checker®HC® Mini Photometer.

Pre-order, available end of November.

Hanna Instruments ' HI713-11 Phosphate Calibration Solution is a set of high quality standards for users to validate the Checker®HC – HI713 Narrow Range Phosphate Monitor.

Standard solution for dkH in seawater – HI772-11 provides a simple solution for checking HI772 dKH .

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 to ensure traceability when certifying the Checker®HC® Mini Photometer.

Calibration solution, 1413 µS/cm from Hanna Instruments .

Hanna Instruments 1382 mg/L TDS Calibration Solution .

Hanna Instruments Cal Check standard solutions , for nitrates, 0.0 and 15.0 mg/L .

pH 10.01 standard solution for calibrating pH meters.