Can a TDS meter measure EC?
Matthew Wilson
Updated on February 28, 2026
A A TDS meter measures that EC level and then converts it to a TDS measurement. ppm (parts per million) is the most commonly used scale to measure TDS (Total Dissolved Solids). µS (micro-Siemens) is the most commonly used scale to measure EC (Electrical Conductivity).
What is a TDS and EC meter used for?
An electrical conductivity (EC) or TDS meter is a quick method to estimate TDS. Water conducts electricity, but the dissolved minerals (ions) in water are what actually conduct the electricity.
How do I know if my TDS meter is accurate?
To ensure greater accuracy, turn the meter off and on for each reading. Shake any water off the meter after each use. sensors and the housing around them. These drops may interfere with readings.
Are EC meters and TDS meters the same thing?
TDS (total dissolved solids) is related to related to EC (electrical conductivity), but they are not the same thing.
What is the difference between EC and TDs and PPM?
Summary ppm stands for parts per million & is the most common domestically used unit when measuring TDS. EC stands for electrical conductivity, which is a measurement of the ability of something to conduct electricity. TDS stands for total dissolved solids and is a measurement of dissolved salts in solution.
What is the difference between EC and TDs?
While TDS can be determined from EC, the two do differ which is why the conversion is only an estimate. EC is looking at how well electricity can pass through the substances that are present in the water.
What is a TDS meter and do you need one?
A Total Dissolved Solids (TDS) meter can be a useful tool in brewing. This meter provides an indirect reading on the ionic content of water which can give you an idea of how the water quality has varied. TDS is the sum of all the various ions (solids) in the water.