Designed for dynamic environments.
edge’s flat profile and long-lasting battery make it easy to carry around your lab while its compact cradle saves valuable space. For smaller labs, mount edge on your wall for easy viewing.
hours battery life
pH CAL points
pH electrode diagnostics
logged data points
year meter warranty
Customize your pH testing experience.
With a wide variety of digital pH electrodes to choose from, expanding edge to meet your needs is easy.
See all digital electrodes >
Easy to learn. Easy to use.
edge® brings professional results to business and educational laboratories worldwide.
The instrument sets up and calibrates in moments, is intuitive to use, the arm support is perfect, the DO probe is robust and accurate.
Very good looking instrument, with very easy to learn user interface. Also the 1 point calibration saves time and money.
"Great pH Meter"
So far, this pH meter has been great! Super easy to use and very low profile. A lot of options with the digital probe that are really nice.
Take care of your electrodes.
Trust that your pH probes are properly cared for with cleaning solutions ranging from dairy deposits to soil.Shop pH cleaning solutions >
Our extensive line of calibration solutions are formulated for a variety of needs, from the technical user to the hobbyist.pH calibration > Conductivity calibration > ORP validation > DO calibration >
We can help you keep your electrode running smoothly with our storage solutions.Shop conditioning solutions >
Speedsafe Magnetic Stirrers
Simple operation. Guaranteed better results.
“Works great, I like that the housing is plastic, helps to avoid issues dealing with corrosion when working with strong acids. Good product, would recommend.” -Satu H.Shop all stirrers >
pH Testing Tips
Depending on the nature of your samples, your pH electrode can become dirty or clogged resulting in slow and faulty readings. Regular cleaning will prolong the life of your electrode.
To ensure your pH measurements are accurate, be sure to calibrate after extended storage, cleaning, and before use. Use fresh buffers that bracket your expected value.
A dry electrode results in slow, incorrect measurements. Always use proper storage solution and be sure to fully cover the junction.
To learn more, download our pH Best Practices Guide here!
Your pH Electrode
Pick the Right Tip Shape for Your Testing Needs.
A spherical tip is the most common shape for a pH electrode due to it's large surface area.
BEST FOR: aqueous samples and general purpose.
A cone shape makes testing of semi-solids easy.
BEST FOR: direct penetration into semi-solids, emulsions, soil, and slurries.
The flat tip allows for the direct surface measurement of a sample.
BEST FOR: flat surfaces, skin, leather, and paper.
Finding the right electrode for specific testing can be tough. In order to help, Hanna Instruments has put together a guide, Getting To Know Your pH Electrode.
Do You Have the Right pH Buffers?
How do you know when calibration is necessary or why your readings are off?
An essential step in achieving accurate pH readings is proper calibration. A clean, calibrated, and conditioned pH electrode will provide accurate and repeatable results. When calibrating a pH electrode it is important to choose buffers that “bracket” (are above and below) the expected reading.
For example, if the expected reading is pH 5.4 then it would be best to calibrate to pH 4.01 and pH 7.01.
We manufacture a wide range of buffer solutions for a variety of uses. Visit our blog to find out What Type of pH Calibration Solution Should You Use?
Need help? These troubleshooting tips can help you out for those times when your pH electrode isn't working right.