The membrane performance of any RO system is measured by comparing the incoming water supply conductivity and the pure water produced by the RO system.  I hand held digital meter is an easy way to see if your membrane requires changing.

Keep an eye on your reverse osmosis system performance by measuring the total dissolved solids ( TDS) after the membrane.  A simple procedure by dipping the TDS metre into a water sample and the metre will give an accurate reading of minerals left in the water. Compare this to reading from the source water to determine how well the membrane is working.

E.g.   RO water = 10  while tap = 100 means 10% minerals and therefore 90% efficiency.

This lightweight and portable digital TDS meter is a great tool for checking the quality of water not only from Reverse Osmosis systems, but any water source.
It has automatic temperature compensation, so reliable readings are ensured no matter the temperature.


* Highly efficient and accurate with automatic temperature compensation.
* Shows the TDS value instantly after being immersed into liquid on the  LCD Screen.
* Energy-saving, power-off automatically after stop using in 5 minutes to save the battery.
* Comes with a protective carry case.

*Range: 0 – 999 ppm
*Resolution: 1 ppm
*Accuracy: +/- 2%
*Power source: 2 x 1.5V button cell batteries (included)
*Battery life: over 1000 hours of continuous use
*Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches)
* Operating Temperature: 0°C-60°C

Package Including:

1×TDS Conductivity Tester (including batteries)
1×Leather Case

Note the supplied item may differ in appearance from the picture. Current stock is off white colour


Weight 2 kg