Featured pH Meters
Slim. Big screen.
Pocket pH Tester
Its slim design fits right in your pocket so you can take it anywhere.
edge Tablet pH Meter
A high-performance bench meter that saves space.
HALO Wireless pH Meter
pH measurements using your smartphone or tablet.
Powerful. Accurate. Advanced.Benchtop pH Meters
With intelligent programming, your benchtop pH meter is designed to help you get the high-quality results you need every time.
Your benchtop pH meter has electrode diagnostics to tell you when your electrode needs cleaning or calibration.
Let your pH meter guide you through setup and calibration with on-screen tutorials so you always know the next step.
Pocket pH Testers
Our basic pH tester that makes upgrading from test strips easy.
Precise. Extended life.
Waterproof pH tester
A renewable junction helps our slim pH tester last longer.
Advanced. Long life.
Waterproof pH tester
Replaceable pH probes extend the life of our most advanced pH tester.
Thin. Professional. Precise.edge Tablet pH Meter
Your edge pH meter will automatically recognize each digital electrode, providing sensor type, calibration data, and serial number.
On-screen indicators track the condition of your electrode between calibrations so you can always be sure you’re getting accurate results.
Use your edge pH meter as a portable or benchtop meter. If you need to save benchtop space, just mount it on the wall.
Waterproof Portable pH Meters
General Use pH Meter
Get accurate results quickly with our simple, waterproof pH meter.
Application Specific pH Meter
Designed with your industry in mind.
Tough. High performance.
Rugged Waterproof pH Meter
Take our meter anywhere for high performance, reliable measurements.
HALO Wireless pH MeterTake laboratory grade pH and temperature measurements using your smartphone or tablet.
Our HALO wireless pH meter is designed to help anyone get high quality pH and temperature results quickly and consistently.
HALO's smart system tells you when your electrode needs cleaning or calibration.
Group your data by time or notation. Email it to storage or share it with friends and colleagues.
Take care of your pH electrodes.
Trust that your probes are properly cared for with cleaning solutions ranging from dairy deposits to soil.Shop cleaning solutions
Our extensive line of calibration solutions is formulated for a variety of needs, from the technical user to the hobbyist.
We can help you keep your testing running smoothly with our electrode fill and storage solutions.
Speedsafe Magnetic Stirrers
Simple operation. Guaranteed better results.
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 its 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.
Do You Have the Right pH Buffers?
An essential step in achieving accurate pH readings is proper calibration. How do you know when calibration is necessary or why your readings are off?
When performing a pH calibration it is important that the correct buffers are used. For example, if you want to measure something with a pH of 9 and you only calibrate your pH meter to a single point with pH 7 buffer you may not get the most accurate measurement. This is because pH measurements are most accurate when multiple calibration points are used to bracket (are above and below) the expected pH value.
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?
Perform an Electrode Quality Test
Monitoring Slope and Offset
Important calibration values to monitor include slope and offset. These numbers provide information on the probe’s overall condition.
Hanna Tip: We recommend that you don't let the offset exceed ±30 mV and the slope percentage stays between 85-105%.
If you have a bad offset, this could mean that you either have a clogged junction or that the probe requires cleaning. If this occurs, try soaking the probe in a cleaning solution and repeat the process of checking offset.
If your slope is bad, this could mean you have used expired or contaminated buffers. If this is the case, ensure that fresh buffers are used.
Want to learn more about how to calculate your slope and offset?
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 the proper storage solution and be sure to fully cover the junction.
To learn more, download our pH Best Practices Guide.