Lab Equipment and Analytical Instruments

Featured Testers

pH Tester

Waterproof. Extended life.

0.01 pH resolution/ ±0.1 pH accuracy.
A renewable junction helps your slim pH tester last longer.

Buy Now

pH and EC Combo Tester

Robust. Complete.

0.01 pH resolution/0 to 3999 µS/cm.
Take conductivity and pH measurements with one simple device.

Buy Now

Digital Thermometer

Portable. Versatile.

-50.0 to 150.0°C/ -58.0 to 302.0°F.
Our most popular thermometer.

Buy Now

Someone calibrating a tester, with buffer solution, before use.

Take care of your pocket testers.

Clean.

Trust that your pH 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 pH tester running smoothly with our storage solutions.

Shop storage solutions

Combo Testers

pH & EC Combo Tester

Robust. Complete.

0.01 pH resolution/0 to 3999 µS/cm
Take pH and conductivity measurements with one simple device.

Buy Now

pH & ORP Combo Tester

Do More. Save Time.

0.01 pH resolution/ ±1000 mV ORP.
Measure pH and ORP without needing two meters.

Buy Now

GroLine pH & EC Combo Tester

Specialized. Advanced.

0.01 pH resolution/ 0 to 3999 ppm.
Ideal for growers who need higher performance.

Buy Now

pH & ORP Testers

HI98103 Checker® pH Tester with 0.1 pH Resolution $44.99

HI98100 Checker® Plus pH Tester $59.99

HI98115 GroLine Hydroponics pH Tester $59.99
$70.00

HI98107 Waterproof Pocket pH Tester with 0.1 Resolution - pHep® $59.99

HI98108 pHep®+ Pocket pH Tester with 0.01 pH Resolution $69.99

HI98118 GroLine Waterproof Hydroponic pH Tester $99.99

HI98127 pH & Temperature Tester with 0.1 pH Resolution - pHep®4 $123.99

HI98128 pH/Temperature Tester with 0.01 pH Resolution - pHep®5 $139.99

HI98120 ORP/Temperature Tester $174.99

Simple. Durable. Accurate.

Waterproof pH and Conductivity Testers

Embrace the elements.

Don’t let rain stand in the way of taking your most essential field measurements.

Durable by design.

Built to withstand dust and debris, our waterproof testers are field tested and approved.

A variety of options.

We have the right waterproof testers for pH, conductivity, or TDS in the field and on the go.

Shop all

Conductivity Testers

Standard Conductivity Tester

Simple. Reliable.

0 to 2000 µS/cm/ ±2% accuracy
Maintain high accuracy for low range conductivity measurements.

Buy Now

Hanna Instruments EC & TDS tester. HI98312

Conductivity & TDS Tester

Advanced. Long Life.

0.00 to 20.00 mS/cm/ ±2% accuracy
Take EC & TDS measurements with higher performance.

Buy Now

Soil Conductivity Tester

Specialized. Helpful.

0 to 2000 ppm (mg/L)/ ±2% accuracy.
Quick and accurate soil conductivity measurements for growers.

Buy Now

Calibration Solutions

Accurate. Portable.

pH Solutions.
Color-coded labels for quick ID.
Helpful for high accuracy pH measurements in the field.

Hanna Instruments conductivity solution. HI70031

Traceable. Portable.

Conductivity Solutions.
Convenient, single-use packages.
Traceable standards for reliable conductivity measurements.

Shop all calibration solutions

Reliable. Easy.

ORP Solutions
Tamper-proof seal to ensure quality
Ensure the quality of your ORP measurements with validation solutions.

Replaceable. Quick. Easy.

Replacement pH Tester Electrodes

Save on your investment.

Only replace the electrode, not the whole tester.

No down time.

Don’t let a broken electrode stop you from testing. Replace with a spare and go.

No-hassle replacement.

Just unscrew the old electrode from the meter body and screw on the new one.

Shop all replacement
pH tester electrodes >

Temperature Testers

Portable. Versatile.

Handheld Digital Thermometer.
-50.0 to 150.0°C/ -58.0 to 302.0°F.
Test temperature on the go or wherever you need to.

Buy Now

Essential. Accurate.

Flexible Digital Thermometer.
-50.0 to 150.0°C/ -58.0 to 302.0°F
Added flexibility with a cable and piercing sensor.

Buy Now

Portable. Ergonomic.

Folding Pocket Thermometer.
-58.0 to 572°F
High accuracy without sacrificing size.

Buy Now

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 it's 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.

Finding the right electrode for specific testing can be tough. In order to help, Hanna Instruments has put together a guide.

Learn More

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?

pH electrode in a buffer.

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.

To learn more about how to calculate your slope and offset, Watch This 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 here!

pH and conductivity testers that fit in your pocket.

Featured Testers

pH Tester

pH and EC Combo Tester

Digital Thermometer

Take care of your pocket testers.

Combo Testers

pH & EC Combo Tester

pH & ORP Combo Tester

GroLine pH & EC Combo Tester

pH & ORP Testers

Simple. Durable. Accurate.

Conductivity Testers

Standard Conductivity Tester

Conductivity & TDS Tester

Soil Conductivity Tester

Calibration Solutions

Accurate. Portable.

Traceable. Portable.

Reliable. Easy.

Replaceable. Quick. Easy.

Temperature Testers

Portable. Versatile.

Essential. Accurate.

Portable. Ergonomic.

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.