Standard solutions for saltwater aquarium

pH 7.01 standard solution for calibrating pH meters.

pH 4.01 standard solution for calibrating pH meters.

Standard solution of 35 ppt for the calibration of salinity testers type HI98319 .

Ref: HI70024P

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 – HI758-11 Marine Calcium Calibration Solutions provide a simple solution to validate the Marine Calcium Checker® HC – HI758 which has a calcium range of 200-600 ppm. 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 indicates the batch number, reference values and expiry date for traceability when certifying the Checker®HC.

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.

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.

Pool line from Hanna Instrument is a 470 mV redox test solution for swimming pools . Sold individually, 20 mL sachet.