Clean Regularly
The most common cause for pH measurement inaccuracies is an unclean or improperly cleaned
electrode. A properly leaned
electrode will ensure that the sensor tip is reading correctly, the junction has optimal flow, and calibration will be accurate.
Hanna carries three lines of calibration solutions: HI50XX are certified technical buffers that range from 1.00 to 13.00 pH and an accuracy of +/- 0.01 pH. HI60XX are certified millesimal buffers that range from 1.000 to 13.000 pH and an accuracy of +/- 0.002 pH. Finally, HI70XX are general purpose calibration buffers that range from 1.68 pH to 10.01 pH.
Hanna buffers are standardized with high precision meters calibrated to NIST references. Hanna caries buffers in 20mL Sachet, 230mL, 500mL, 1L, and 1 Gallon sizes. Most buffers are available with certificates, in FDA bottles, and have a shelf life of up to 5 years.
| Solution | Application/purpose |
| HI7061L | General Purpose |
| HI7073L | Proteins |
| HI70630L | Acid Cleaning for Meat, Grease, and Fats |
| HI70631L | Alkaline Cleaning Solution for Meat, Grease, and Fats |
| HI7074L | Inorganic Substances |
| HI7077L | Oil and Fats |
| HI70635L | Wine Deposits |
| HI70640L | Milk Deposits |
| HI70641L | Cleaning and Disinfection for Dairy |
| HI70642L | Cheese residues |
| HI70663L | Soil Deposits |
| HI70670L | Salt deposits |
Calibrate Often
Calibrate to correctly maintain electrode operation for accurate and
reproducible readings.
| pH Value @25C* | HI50XX | HI60XX |
| 1.68 | HI5016 | HI6016 (1.679 pH) |
| 3 | HI5003 | HI6016 (1.679 pH) |
| 4.01 | HI5004 | HI6016 (1.679 pH) |
| 6.86 | HI5068 | HI6016 (1.679 pH) |
| 7.01 | HI5007 | HI6007 (7.010 pH) |
| 9.18 | HI5091 | HI6091 (9.177 pH) |
| 10.01 | HI5010 | HI6010 (10.010 pH) |
Condition Always
Keep the glass bulb and junction of your pH electrode hydrated; this reduces junction clogging and improves response times.
Never store electrodes in pure water (deionized), RO, distilled, pure, or demi water.
Use HI70300L electrode storage solution to properly maintain your electrode.
Electrolyte fill solutions are required for refillable electrodes. Keeping a proper fill level ensures proper head pressure to keep the liquid junction flowing. Loosen the cap when performing calibration or a measurement to improve head pressure.
Use HI7071L for single junction electrodes or HI7082 for double junction pH electrodes
Choose Stirrer
The response time and accuracy of a reading may be impacted when a sample is not agitated. Hanna recommends using magnetic stirrers to ensure that the pH buffer or sample is mixed well. The movement of the solution will improve the response time of the electrode in the solution.
| Item # | Description |
| HI190M | Square stirrer for up to 1-liter capacity |
| HI181-1 | Round stirrer with electrode arm for up to 1-liter capacity |
| HI180-1 | Round stirrer for up to 1-liter capacity |
Choose Electrode
Most meters come with general
purpose electrodes. Although these work well for many applications, there are a number of applications that require specialized electrodes such as food, beverage, cosmetics, water treatment, plating, etc. Several factors play into choosing the proper electrode: sample temperature, viscosity, sample preparation, and sample composition are all important to consider.
Before purchasing the appropriate electrode please be sure to check the type of connector that your meter accepts: BNC, DIN, Quick DIN, 3.5 mm digital, BNC + Pin, Screw or T-Type.
| Item # Application | Connector type |
| HI1131X | General Purpose BNC, BNC+Pin, DIN, digital |
| HI1230X | General Purpose/Field BNC, DIN, digital |
| FC202X | Milk, yogurt, dairy, meat, semi-solid foods DIN |
| FC200X | Milk, yogurt, dairy, meat, semi-solid foods BNC, DIN, digital |
| HI1332X | Chemicals, field applications, QC BNC, BNC+Pin, DIN |
| HI1043X | Hydrocarbons, paints, solvents, sea water, strong acids/bases, tris buffer BNC, BNC+Pin, digital |
| HI1048X | Wine, juice BNC, BNC+Pin, DIN, digital |
| FC232X | Meat, cheese, semi solid food samples DIN, digital |
| HI1053X | Fats, creams, soil samples, potable water, semi-solid samples, emulsion, low conductivity solutions, BNC, BNC+Pin, digital |
| HI1083X | Biotechnology, Samples <100uL BNC, BNC+Pin |
| FC210X | Yogurt, Creams BNC |
| HI73127X | General purpose Pin, for use with HI9812x meters |
| HI1296X | Wastewater DIN |
Choose Meter
The type of meter you use will have an impact on the readings you obtain. Hanna manufactures pH meters in different categories: testers, portable, benchtop, and process.
Each meter has different benefits
and price points.
| Item # | Type | Application | Description |
| HALO | Bluetooth meter/electrode | Various | HALO pH electrode with Bluetooth Smart technology interfaces with your iPhone, iPad, iPod, Android |
| HI98128 | Tester | General purpose | Waterproof tester with a replaceable electrode ideal for field applications and basic pH testing |
| HI9814 | Portable meter | Agriculture/hydroponics | Quick Calibration mode to calibrate pH, EC/TDS. $199 Hydroponics Amplified Electrode to resist electrical interference |
| HI9816x/HI991xx | Portable meter | Specific applications | Waterproof portable meter applications include; Soil, Plating, Milk, Yogurt, Cheese, Food & Dairy, Drinking Water, Beer, Wine, Meat, Paper, Leather, Skin |
| HI9819x | Portable meter | Industrial, Lab and field | Waterproof and rugged, it’s the most popular Portable meter Hanna manufactures. The HI9819X series comes with a case that has all accessories needed for measurement, logs up to 300 records, calibrates up to 5 points, and has Cal Check. The HI98191 is able to use any BNC electrode. |
| edge HI2002/HI2020 | hybrid | Lab, industrial, field, education, food | The best Hybrid meter in the market. Performs up to 5-point calibration. CAL Check, .001 pH resolution, Wall-Mount capacitive touch tablet style meter. Transfer data to Hybrid a computer or USB. |
| HI522x | Professional research grade | Lab | Available in 1 or 2 channel, HI522X are research grade meters that allow for real time graphing, 5-point calibration, PC connectivity, Cal CheckTM, and are fully customizable. |
* CAL Check™ is a diagnostics system that ensures accurate pH readings every time. By alerting users to potential problems during the calibration process, the Cal CheckTM system eliminates erroneous readings due to dirty or faulty pH electrodes or contaminated pH buffer solutions during calibration. The meter
will display the electrode condition and response times and make recommendations accordingly.
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