pH Meter | Hanna Instruments

Featured pH Meters

Slim. Big screen.

Pocket pH Tester

Its slim design fits right in your pocket so you can take it anywhere.

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Thin. Professional.

edge Tablet pH Meter

A high-performance bench meter that saves space.

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HALO2-Lab-Wireless-Refillable-pH-Tester-HI9810402

Simple. Original.

HALO2 Wireless pH Meter

pH measurements using your smartphone or tablet.

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Shop all tablet pH meters

Hanna Instruments - Benchtop pH meter with compact magnetic mini-stirrer.

Powerful. Accurate. Advanced.

Benchtop pH Meters

Get more out of one device.

With intelligent programming, your benchtop pH meter is designed to help you get the high-quality results you need every time.

Higher quality measurements.

Your benchtop pH meter has electrode diagnostics to tell you when your electrode needs cleaning or calibration.

Helpful.

Let your pH meter guide you through setup and calibration with on-screen tutorials so you always know the next step.

Learn More

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Pocket pH Testers

Simple. Popular.

pH tester

Our basic pH tester that makes upgrading from test strips easy.

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Precise. Extended life.

Waterproof pH tester

A renewable junction helps our slim pH tester last longer.

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Advanced. Long life.

Waterproof pH tester

Replaceable pH probes extend the life of our most advanced pH tester.

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Simple. Portable. Specific.

Specialized pH Testers

For professionals and serious hobbyists who want to bring the combination of simplicity and precision to their application, Hanna’s Specialized pH Testers deliver accurate results. It’s the convenience of the Checker^® you love with the specialized electrode you need to take flawless measurements.

Thin. Professional. Precise.

edge Tablet pH Meter

Plug and play.

Your edge pH meter will automatically recognize each digital electrode, providing sensor type, calibration data, and serial number.

Trust your results.

On-screen indicators track the condition of your electrode between calibrations so you can always be sure you’re getting accurate results.

Test anywhere, anytime.

Use your edge pH meter as a portable or benchtop meter. If you need to save benchtop space, just mount it on the wall.

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Waterproof Portable pH Meters

Small, black, waterproof, portable pH/temperature meter.

Accurate. Multi-purpose.

General Use pH Meter

Get accurate results quickly with our simple, waterproof pH meter.

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Reliable. Specialized.

Application Specific pH Meter

Designed with your industry in mind.

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Tough. High performance.

Rugged Waterproof pH Meter

Take our meter anywhere for high performance, reliable measurements.

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pH Electrodes

Simple. Affordable.

Tester Replacements

Quick replacements for your pocket pH tester.

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Tough. Responsive.

Portable pH Electrodes

Rugged designs to withstand a dynamic environment.

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Accurate. Fast.

Lab pH Electrodes

A design for every laboratory use.

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Three colorful bottles of buffer solutions.

Take care of your pH electrodes.

Clean.

Trust that your probes are properly cared for with cleaning solutions ranging from dairy deposits to soil.

Shop cleaning solutions

Calibrate.

Our extensive line of calibration solutions is formulated for a variety of needs, from the technical user to the hobbyist.

Shop calibration solutions

Condition.

We can help you keep your testing running smoothly with our electrode fill and storage solutions.

Shop conditioning solutions

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Speedsafe Magnetic Stirrers

Simple operation. Guaranteed better results.

Powerful. Reliable.

Pro Grade Stirrers

High performance; simplified.

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Small. Simple.

Space Saving Stirrers

Color your busy benchtop for easy recognition.

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Hanna's mini stirrer with electrode holder. HI181

Inclusive. Simple.

Stir and Hold

Hands-free; let the stirrer do the holding.

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Your pH Electrode

Pick the Right Tip Shape for Your Testing Needs.

Spherical

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.

Conical

A cone shape makes testing of semi-solids easy. BEST FOR: direct penetration into semi-solids, emulsions, soil, and slurries.

Flat Tip

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?

Learn more

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?

Watch our video

pH Testing Tips

Clean Regularly.

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.

Calibrate Often.

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.

Condition Always.

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.

Download Guide

A better pH meter by design.

Featured pH Meters

Slim. Big screen.

Thin. Professional.

Simple. Original.

Powerful. Accurate. Advanced.

Pocket pH Testers

Simple. Popular.

Precise. Extended life.

Advanced. Long life.

Simple. Portable. Specific.

Thin. Professional. Precise.

Waterproof Portable pH Meters

Accurate. Multi-purpose.

Reliable. Specialized.

Tough. High performance.

pH Electrodes

Simple. Affordable.

Tough. Responsive.

Accurate. Fast.

Take care of your pH electrodes.

Speedsafe Magnetic Stirrers

Powerful. Reliable.

Small. Simple.

Inclusive. Simple.

Your pH Electrode

Spherical

Conical

Flat Tip

Do You Have the Right pH Buffers?

Perform an Electrode Quality Test

pH Testing Tips

Clean Regularly.

Calibrate Often.

Condition Always.