1:5:10:365 EcoTip Blog

November 25, 2008

:330 Testing Purifiers

Take the 1:5:10:365 challenge: Do one thing – for 5 to 10 minutes – 365 days a year to make our home and planet environment better.

1:5:10:330 EcoTip: Reverse osmosis water purifiers can be checked to see if the R/O membrane is working properly. This is done by testing the conductivity of the water. Special meters are designed for this purpose, but any electrical conductivity tester can be used. You can also send a sample of your purified water to a laboratory for testing.



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To use an electrical multi-meter for testing the water to see if the R/O membrane working – set the meter on the conductivity test setting. The probes need to be kept the same distance apart every time you test. Since tap water contains salts and minerals it will conduct electricity. Use a sample of tap water to check your meter reading. The closer the R/O water’s conductivity reading is to that of tap water, the less the purifier is removing.

If you check your R/O water with the meter when the purifier is new – you will have a baseline to compare. You may also want to test the meter with distilled water – which should have no conductivity.

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