pH and conductivity testers that fit in your pocket.

Take accurate and reliable measurements with our portable testers that go where you go.

Testers

pH and conductivity testers that fit in your pocket.

Take accurate and reliable measurements with our portable testers that go where you go.



Testers

Featured Testers


pH Tester

Waterproof. Extended life.

$49.50

pHep+ Waterproof Pocket pH Tester with 0.01 pH Resolution - HI98108

0.01 pH resolution/ ±0.1 pH accuracy

A renewable junction helps your slim pH tester last longer.

pH and EC Combo Tester

Robust. Complete.

$150

Combo pH/Conductivity/TDS Tester (Low Range) - HI98129

0.01 pH resolution/0 to 3999 µS/cm

Take conductivity and pH measurements with one simple device.

Digital Thermometer

Portable. Versatile.

$37

Checktemp® Digital Thermometer - HI98501

-50.0 to 150.0°C/ -58.0 to 302.0°F

Our most popular thermometer.

 

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 are formulated for a variety of needs, from the technical user to the hobbyist.

pH calibration > Conductivity calibration > ORP calibration >

Condition.

We can help you keep your pH tester running smoothly with our storage solutions.

Shop conditioning solutions >

Shop all solutions >

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 are formulated for a variety of needs, from the technical user to the hobbyist.

pH calibration > Conductivity calibration > ORP calibration >

Condition.

We can help you keep your pH tester running smoothly with our storage solutions.

Shop conditioning solutions >

Shop all solutions >

Combo Testers


pH & EC Combo Tester

Robust. Complete.

$150

Combo pH/Conductivity/TDS Tester (Low Range) - HI98129

0.01 pH resolution/0 to 3999 µS/cm

Take pH and conductivity measurements with one simple device.

pH & ORP Combo Tester

Do More. Save Time.

$179

pH/ORP/Temperature Combo Tester - HI98121

0.01 pH resolution/ ±1000 mV ORP

Measure pH and ORP without needing two meters.

GroLine pH & EC Combo Tester

Specialized. Advanced.

$209

GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester - HI98131

0.01 pH resolution/ 0 to 3999 ppm

Ideal for growers who need higher performance.

 

Shop all testers >

pH & ORP Testers


Shop all pH & ORP testers >

Simple pH Tester

Simple. Economical.

$29.50

Checker® pH Tester with 0.1 pH Resolution - HI98103

0.1 pH resolution/ ±0.2 pH accuracy

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

pH tester

Simple. Popular.

$41

Checker® Plus pH Tester - HI98100

0.01 pH resolution/ ±0.2 pH accuracy

Our basic pH tester upgraded with increased resolution.

GroLine pH Tester

Specialized. Grow Better.

$59

GroLine Hydroponics pH Tester - HI98115

0.01 pH resolution/ ±0.2 pH accuracy

Specialized for hydroponics with a simple, friendly design.

 

Standard pH Tester

Slim. Big Screen.

$39.50

pHep Waterproof Pocket pH Tester with 0.1 pH Resolution - HI98107

0.1 pH resolution/ ±0.1 pH accuracy

It's slim design fits right in your pocket so you can take it anywhere.

High Resolution pH Tester

Precise. Extended Life.

$49.50

pHep+ Waterproof Pocket pH Tester with 0.01 pH Resolution - HI98108

0.01 pH resolution/ ±0.1 pH accuracy

A renewable junction helps our slim pH tester last longer.

GroLine pH Tester

Specialized. Precise.

$79

GroLine Waterproof Hydroponic pH Tester - HI98118

0.01 pH resolution/ ±0.1 pH accuracy

Specialized for hydroponics with a renewable junction for extended life.

 

pH Tester with Replaceable Probe

Efficient. Long Life.

$89

pHep®4 pH/Temperature Tester - HI98127

0.1 pH resolution/ ±0.1 pH accuracy

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

High Resolution pH Tester with Replaceable Probe

Advanced. Long Life.

$98

pHep®5 pH/Temperature Tester - HI98128

0.01 pH resolution/ ±0.05 pH accuracy

Get more from your pH measurements with higher resolution.

ORP Tester with Replaceable Probe

Fast. Easy.

$129

ORP/Temperature Tester - HI98120

±1000 mV range/ ±2 mV accuracy

Our standard ORP tester for quick and easy results.

 

Shop all pH & ORP testers >

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 waterproof testers >

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 waterproof testers >

Conductivity Testers


Standard Conductivity Tester

Simple. Reliable.

$52

DiST 3 Waterproof EC Tester (0-2000 µS/cm) - HI98303

0 to 2000 µS/cm/ ±2% accuracy

Maintain high accuracy for low range conductivity measurements.

Conductivity & TDS Tester

Advanced. Long Life.

$99

DiST® 6 EC/TDS/Temperature Tester - HI98312

0.00 to 20.00 mS/cm/ ±2% accuracy

Take EC & TDS measurements with higher performance.

Soil Conductivity Tester

Specialized. Helpful.

$119

Soil Test™ Direct Soil EC Tester - HI98331

0 to 2000 ppm (mg/L)/ ±2% accuracy

Quick and accurate soil conductivity measurements for growers.

 

Shop all conductivity testers >

Calibration Solutions


pH Solutions

Accurate. Portable.

Starting at $9

pH Calibration Solutions

Color-coded labels for quick ID

Helpful for high accuracy pH measurements in the field.

Conductivity Solutions

Traceable. Portable.

Starting at $9

Conductivity Calibration Solutions

Convenient, single-use packages

Traceable standards for reliable conductivity measurements.

ORP Solutions

Reliable. Easy.

Starting at $16

ORP Calibration Solutions

Tamper-proof seal to ensure quality

Ensure the quality of your ORP measurements with validation solutions.

 

Shop all 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 >

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 electrodes >

Temperature Testers


Handheld Digital Thermometer

Portable. Versatile.

$37

Checktemp® Digital Thermometer - HI98501

-50.0 to 150.0°C/ -58.0 to 302.0°F

Test temperature on the go or wherever you need to.

Flexible Digital Thermometer

Essential. Accurate.

$39

Checktemp® 1 Digital Thermometer - HI98509

-50.0 to 150.0°C/ -58.0 to 302.0°F

Added flexibility with a cable and piercing sensor.

Folding Pocket Thermometer

Portable. Ergonomic.

$58

HI151-01 Checktemp®4 Fahrenheit Folding Thermometer

-58.0 to 428°F

High accuracy without sacrificing size.

 

Shop all temperature testers >

Simple. Original. Smart.

HALO Wireless pH Meter

Upgrade your portable pH testing experience.

Take laboratory grade pH and temperature measurements using your smart phone or tablet.


Simple. Original. Smart.

HALO Wireless pH Meter

Upgrade your portable pH testing experience.

Take laboratory grade pH and temperature measurements using your smart phone or tablet.


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, Getting To Know Your pH Electrode.

 

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.

To learn more about how to calculate your slope and offset, Watch This Video.


We manufacture a wide range of buffer solutions for a variety of uses. Visit our blog to find out WhatType of pH Calibration Solution Should You Use?