Apera Instruments

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...

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...

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...

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 ...

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...

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...

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...

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...

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...

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...