Hanna Instruments Digital pH Testers

pH meters measure acidity/alkalinity. These units are accurate enough for testing the pH of fountain solution of printing presses, yet inexpensive enough to use at work or home for testing soil, water, food service compliance with HACCP regulations, tropical fish aquariums, aqua culture, hydroponic gardening and farming, winery/brewery process control, and swimming pools. They are even used by sushi restaurants to make sure the rice meets health department guidelines!

HINTS: To test the pH of soil in gardens and lawns, mix two parts of distilled or de-ionized water per part of soil, let the solids settle to the bottom, and measure the pH of the solution at the top. To test rice, add enough distilled or de-ionized water to make the rice moist enough to measure. When checking cooked food, allow it to cool to room temperature, so the pH bulb will last longer. In such instances, a temperature compensating meter, such as the HI98127 or HI98128 will give more accurate readings.

All units are rugged, pocket-size, battery operated (batteries are included), and have LCD displays. They measure directly with no need to remove messy samples.

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We offer a variety of economical pH testers so that you will be able to select the unit best suited for your needs. For the cost of a few rolls of unreliable litmus paper, you get an electronic instrument to provide accurate, consistent, and reliable pH measurement.

Hanna's line of combo meters gives you the ability to measure two or more essential parameters, with a single, reliable and economical instrument. All are waterproof and have replaceable electrodes for the primary usage.

Calibration solutions are essential to keeping your meter reading accurately and reliably. The bulb in a pH meter is a semi-permeable glass membrane with a reference solution inside. Over time, the reference solution changes, and the calibration solution is used to adjust the meter to these changes.

There are three common pH values: 4.01 (acid), 7.01 (neutral), and 10.01 (alkaline). Two point calibration with 4.01 and 7.01 or 7.01 and 10.01 gives the most accurate result But if the values you expect to read are right around one of these values, you may be able to use just one.

A few drops of the storage solution placed in the cap of the meter help to keep it moist, and minimize the change to the reference solution.

Hanna pH Testers