An original best seller
pHep®5 pH/Temperature Tester
One of the very first pH Testers that we ever created, our pHep®5 is hands down a customer favorite. This portable Tester delivers pH results with high precision and accuracy in the field.
Top choice for dependability in the field
DiST®1 TDS Tester
This Tester is extremely user-friendly with easy two-button operation. Ideal for low conductivity ranges (0 to 2000 ppm). Collect instant and exact TDS readings wherever you are.
Are you prepared to test in the field?
Intuitive. Durable. Accurate.
Waterproof pH and Conductivity Testers you can count on.
Did you know?
You can easily replace electrodes.
With proper care and maintenance, electrodes typically last between 1 to 2 years. However, this can vary depending on your application. The good news is, we have replacement electrodes for our Testers. When the time comes, you don't need to purchase an entirely new Tester all over again. Instead, you can quickly swap out the electrode with a replacement one and resume testing immediately.
With replacement electrodes you can:
- Save on your Tester investment for the long term. There's no need to buy a new Tester, just change out the electrode and be ready to go.
- Eliminate any down time. By keeping spare electrodes on hand, you can easily switch out a broken electrode and continue testing.
- Enjoy hassle-free replacement. Just unscrew the old electrode from the Tester body and screw on the new one.
Header Align: center
Spherical
This is the most common shape for a pH electrode due to its large surface area. BEST FOR: Aqueous Samples and General Purpose Uses
Conical
Perfect for testing semi-solid samples. BEST FOR: Spot checks and direct penetration of semi-solid, emulsions, soil, and slurries.
Flat Tip
This type of electrode allows for the direct surface measurement of a sample. BEST FOR: flat surfaces, skin, leather, and paper.
Do you have the correct pH buffers?
Proper calibration is an essential step to ensure that your pH readings are not off.
Putting a pH electrode in a buffer is key. When performing a pH calibration, it is important that the correct buffers are utilized. For example, if you want to measure something with a pH of 9 and you only calibrate your pH Tester to a single point with pH 7 buffer, then you may not get the most accurate measurement. This is because pH measurements are most precise when multiple calibration points are used to bracket (are above and below) the expected pH value. We manufacture a wide range of buffer solutions.
How to perform an electrode quality test?
Monitor 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.