*	Easy-to-use laboratory-grade calibration solutions for electronic pH testing instruments
*	Establish standardized reference points to help maintain accurate reading of aquarium pH
*	Single-use pH calibration buffer solutions are individually sealed to ensure freshness and accurate aquarium test results

Ensure accurate results from your precision electronic testing equipment with easy-to-use, laboratory-grade calibration solutions from Hanna Instruments. Hanna pH Calibration Buffer Solutions are produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature-controlled environment monitored with certified thermometers. Reported values are accurate to +/- 0.01 pH@ 25°C and are traceable to NIST Standard Reference Materials (SRMs). Each sealed sachet holds just the right amount of pH calibration buffer solution making every sachet as fresh as the day it was packaged! Hanna Calibration Buffer Solutions are each marked with a lot number and expiration date and are specially formulated to maintain their pH value for several years from the date of manufacture for unopened sachet. Single-use pH calibration buffer solutions available in color-coded sachets for pH 4.01, 7.01, and 10.1.

pH 4.01
Premium quality pH 4.01 calibration solution perfect for use with testers and portable meters. Individually sealed sachet holds just the right amount of pH buffer solution making every sachet as fresh as the day it was packaged. Perfect for use in aquarium applications where the pH is expected to be slightly acidic.

Formulation
Potassium Hydrogen Phthalate

pH 7.01
Wide Range pH 7 is the most frequently used pH buffer perfect for use with testers and portable meters. Individually sealed sachet holds just the right amount of pH buffer solution making every sachet as fresh as the day it was packaged.

Formulation
Potassium Dihydrogen Phosphate and Disodium Hydrogen Phosphate.

Formulation
Sodium Bicarbonate and Sodium Carbonate.

pH 7.01 and 10.01 Calibration Buffer Sachets (10 x 20mL, 5 Each)
A set of premium quality pH 7.01 and 10.01 calibration buffer solutions. Individually sealed sachet holds just the right amount of pH buffer solution making every sachet as fresh as the day it was packaged. Perfect for use in aquarium applications where the pH is expected to be slightly basic (alkaline). Formulation
pH 7.01: Potassium Dihydrogen Phosphate and Disodium Hydrogen Phosphate; pH 10.01: Sodium Bicarbonate and Sodium Carbonate.