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What are Total Dissolved Solids (TDS) in water?

Why should you measure TDS?
Dissolved solids are any chemicals, minerals, or inorganic & organic compounds that are dissolved in water. These enter your water supply from a wide range of sources — piping, storage tanks, run-off from roads and other surfaces, pesticides, fertilizers, and more.
Dissolved chemicals in water form charged particles: Anions and Cations. We can measure their concentration by measuring the conductivity of water, which is then converted to TDS. This method is used universally to gauge the purity of water. TDS is measured as milligram/litre or PPM (parts per million). The higher the TDS value the more impure the water.

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Different filter technologies filter out varying particle size contaminants. In a Reverse Osmosis water filter system, the RO Membrane with its 0.0001 Micron pore size almost entirely eliminates particles above this diameter. This includes all contaminants, bacteria, viruses and also these charged particles. The conductivity measured after the RO membrane is very low thus providing us with a measure of the quality of water.

How is TDS measured?

Traditional TDS Meters
Owners and Service providers of Reverse Osmosis water filter systems typically measure the performance of their systems manually by collecting filtered water in a cup and then dipping a hand held meter. These measurements are taken sporadically or when the system needs attention. This process is very tedious and thus not performed regularly. Readings vary from meter to meter, based on the size of the cup and the angle at which the meter is dipped in water. There is no historical data over the life of the filter to analyze performance. There is no way to assess how the filter system is performing.

Meet TDSBot, the real time monitoring solution

TDSBot has 5 sensors that measure incoming and filtered water (TDS), temperature, volume of filtered water and its flow rate in your RO System. It takes over 1400 readings per day and stores the data on AWS servers. This data is normalized according to ASTM standards and analyzed by our machine learning algorithms. It provides you with real time quality of water, total water filtered, and status of filter cartridges. It notifies you about water quality, leaks, abnormal temperature and provides predictive filter maintenance alerts.

Access your data from anywhere with the free TDSBot app

The App provides you with quality of incoming and purified water (TDS), status of your filter system in real time. Unlike any other device we found a better way to monitor your Reverse Osmosis water filter system.
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  • Improve health with the right insights
  • Know the quality of water. Get alerted to changes in incoming and purified water quality including temperature or if there is a leak or blockage.
  • Know the volume of water filtered by day, week, month and total.
  • Know in advance when to change filters. Too often we tend to realize that the filter needs changing after the filter has stopped working or worse, when the water smells bad.
  • Change filters only when needed. Sometimes filters perform longer than their standard life due to better incoming water or lower usage. Reduce waste and possibly save money.

Water quality data for everyone:

We plan to publish the incoming water quality data aggregated by zip (postal) code and city so that anyone can check the real time or historical water quality data for their location. It is our mission that by seeing the quality of water, everyone will make choices that enables them to consume cleaner water and improve their health.

How safe is your water

Enter your city or zip code to find out!
* Currently data is available for USA only.
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