A Guide to the Correct Purchase of a pH Meter

Accuracy, electrodes, calibration, temperature and portability are the essential factors that you must consider when purchasing Eutech pH Meter. If you are a first-time buyer, this article is exceptionally right for you. We will guide you in making a decision that will best suit your needs by discussing below the essential aspects that you should take into consideration when buying one.

Accuracy

The level of accuracy that the reporting needs is one thing that you must consider. Compared to an educational demonstration, a research or quality assurance application may require more accuracy. The accuracy of meters mostly ranges from ±0.1 pH to ±0.001 pH. For instance, the excellent choice for quality control or research environments is a pH meter with an accuracy of ±0.01. A pH meter with ±0.10 accuracy is more affordable for school laboratory use and be enough for their needs, but most importantly, keep in mind that those low-cost meters are not durable enough to last for a long time. As a result, you will end up getting replacements often.

Calibration

To ensure that the results you will read are accurate, it is only imperative that all pH meters should be calibrated. Calibration is significantly achieved with the use of pH buffer solutions. The 4, 7 and 10 are the most common types of buffer solution and are often colour coded red, yellow and blue. It is also ideal for you to consider buying a meter that uses at least a 2-point calibration and calibrate as near as possible to your expected result. Although it is possible to purchase 3-point and 5-point calibration pH meters which dramatically increase the range of measurement, however, you can only utilise it if you need to test a wide range of pH. Also, both in bench and pocket meters, newer meters and testers also have much simpler single step calibration procedures.

Portability

You should consider a pocket or handheld meter for a highly portable pH meter. Although they may be small, they are incredibly durable and waterproof. Also, look for meters that are designed to float if it is dropped in a water source. You may be better off considering a benchtop meter if you are looking for accuracy and are planning to use your pH meter in the laboratory. Rest assured, your investment will be worth it as it is designed for long term reliability and to offer advanced functionality.

Temperature

Temperature dramatically affects pH readings. That’s why it is crucial that the Eutech pH Meter must be calibrated at the same temperature as the samples being tested to ensure you get an accurate reading. To compensate for variations in sample temperature, more advanced meters have automatic temperature compensation. Thus, it is ideal that before you monitor product pH and test the pH or room-temperature samples, you have to calibrate your pH meter first.