FAQs

Default solution folder, feel free to edit or delete it.

The Easiest Way to Tell whether a pH Meter is Accurate or Not?
The only reliable way to determine whether a pH meter is accurate or not is to test it in standard solutions. Just like the only way you can tell if a scale...
Thu, Dec 19, 2019 at 4:25 PM
How test soil slurry's pH?
Remove about 2 inches (5cm) of the top layer soil and collect different locations’ soil samples at approximately 6 inches (15cm) deep. Thoroughly mix a...
Tue, Aug 30, 2022 at 6:27 AM
How to measure the pH of pure water with a regular pH tester?
Using a regular pH tester like Apera PH20 and PH60 to test pure water like tap water, drinking water, RO water, distilled, and deionized water could be a ch...
Tue, Aug 30, 2022 at 6:29 AM
How to measure pH of HF-containing solutions?
Acidic error occurs in strong acid solutions where the decrease of H+ activity leads to a higher pH reading than the real value (usually happens when pH is ...
Tue, Aug 30, 2022 at 6:43 AM
EC, µS, mS –– How to convert?
1 mS (millisiemens) = 1,000 µS (microsiemens) = 1 EC For example: 1500 µS = 1.50 mS = 1.50 EC 2.85 mS = 2.85 EC = 2,850 µS 5.90 mS = 5.90 EC...
Tue, Aug 30, 2022 at 6:29 AM
Why is my TDS measurement showing PPT instead of PPM?
If you are in an industry that requires you to measure the TDS (total dissolved solids) in a water solution, you may sometimes get a measurement that uses p...
Tue, Aug 30, 2022 at 6:29 AM
How to Choose the Right pH Electrode for Your Application?
Regular pH electrodes like 201T-F, 201T-S, or the glass bulb probes in most Apera pocket testers are only suitable for testing general water solutions — med...
Tue, Aug 30, 2022 at 6:30 AM
Why there is liquid in my new pH tester cap? Is it used?
Before shipment, the factory adds in some water droplets to the tester's cap to maintain a hydrated atmosphere for the probe. This ensures that the pH s...
Tue, Aug 30, 2022 at 6:31 AM
Should I always keep my pH electrode soaked in storage solution?
The only Apera pH electrodes that must be always stored in storage solutions and can be damaged if stored dry are the ones that use Polymer electrolytes, s...
Tue, Aug 30, 2022 at 6:32 AM
How to Properly Use Standard Calibration Solutions?
The quality of your standard solutions is fundamental to the accuracy of your measurement. No matter how good the meter is, if the standard is messed up, re...
Tue, Aug 30, 2022 at 6:33 AM