pH meters are used to measure the acidity and alkalinity of laboratory samples. Choosing the right pH meter probe (electrode) is important to configure the instrument to your sample type. For example, electrodes with stainless steel blades can be used to directly measure pH in solid samples, such as food. When purchasing a pH meter, labs should consider how easy it is to calibrate and use, and the accuracy of the instrument. For a list of pH meter manufacturers, see our online directory: LabManager.com/pH-meter-manufacturers

5 Questions to Ask When Buying a pH Meter:

1. How accurate is the instrument and what level of accuracy do you need for your application?
2. What electrodes are available and are they compatible with your sample needs?
3. What steps are involved in calibrating the instrument?
4. How easy to read is the pH meter’s screen?
5. Can the instrument be easily connected to your LIMS or other laboratory management software?

eBook

If you want to know more about pH meters and what to look for when purchasing, our pH Meter Resource Guide eBook shares what to ask when buying these instruments, expert advice on how pH meters can improve your lab, information on the latest products, and helpful maintenance tips. LabManager.com/PRG-2022-pH-meters

Maintenance Tip

To keep your pH meter in top shape, you’ll want to clean the probes on a regular basis, either every week or every month, depending on your application. Lab professionals should always follow the manufacturer’s instructions for cleaning or replacing their probes as some solutions can damage them. Probes also usually need to be replaced every 12 to 18 months.