REVERSE OSMOSIS WATER PURIFIERS

The total dissolved solids (TDS) is a measure of the amount of various inorganic salts dissolved in water. The TDS concentration is directly proportional to the electrical conductivity of water. The TDS reading on a TDS meter indicates the presence of ions in water such as carbonate, bicarbonate, chloride, sulphate, nitrate, sodium, potassium, calcium and magnesium, all of which carry an electrical charge. Most organic compounds dissolved in water do not dissociate into ions; consequently they do not affect the Electrical Conductivity. 

RO is the most effective method of water filtration. It filters water by squeezing water through a semi-permeable membrane, which is rated at 0.0001 micron (1/1000 000th of a micron). R.O. is also the only technology capable of desalinating seawater, making it into drinking water.

Non-RO water filters are much less effective, and the pore size on these filter media are much bigger, generally 0.5 - 10 micron. They can filter out coarse particles, sediments and elements only up to their micron rating. Anything finer and most dissolved substance cannot be filtered out. As a result, water is far less clean and safe compare to reverse osmosis filtration.