TDS Controller vs Mineralizer | Which is better?

This comparison table should answer all your queries concerning TDS Controller and Mineralizer.

TDS ControllerMineralizer
It introduces a part of the source water to RO-purified water. The mineralizer introduces essential minerals lost during the RO purification process. So it does not contaminate the water.
This arrangement is suitable if the TDS in the water source is less than 1500 and the water does not have heavy metal impurities like arsenic, lead, etc.The mineralizer works for all RO water purifiers, regardless of the TDS content. So it is suitable for water sources with TDS content up to 2000.
Users can control the TDS levels in water by adjusting the water input.Users do not have any control over the TDS content in the RO-purified water.
The TDS controller is a built-in arrangement. It does involve any additional expenses.The Mineralizer arrangement requires the replacement of cartridges and incurs additional maintenance costs.
TDS controller is a mechanical arrangement.The mineralizer introduces a chemical reaction as the water passes through the cartridge.
Users do not get 100% RO-purified water.Mineralizer ensures 100% RO-purified water.
A water purifier with a TDS controller arrangement is less expensive.The mineralizer makes the RO water purifier more expensive.
TDS Controller
TDS Controller

You have seen the functions and the working of the TDS controller. There is a new concept in water purifying technology that uses mineralizers.

Let us see what a mineralizer is and how does it work. This will explain the difference between the TDS controller and the mineralizer.

The mineralizer works on the principles of ionization and electrolysis. This process involves the passing of variable low voltage Direct Current into the ionization chamber to enable the process of electrolysis. 

There is a release of positively charged ions of copper and silver. Copper and silver ions have anti-toxic properties. Silver is a natural toxin for bacteria and copper to algae.

Kent Supreme Alkaline water purifier review

The release of these positively charged ions purifies the water completely without causing any side effects that you would usually observe when you use chlorine for purification. The resultant water has a refreshing smell and taste.

In addition to removing the toxicity, the mineralizer ensures the release of essential minerals lost during the RO purification process. This enables selective infusion of minerals like calcium, and magnesium. 

This is not possible in the case of TDS controllers. When you use TDS controllers, you mix purified source water with normal TDS along with RO purified water with a minimum concentration of TDS.

Strictly speaking, you infuse the same minerals that the RO process has eliminated. Of course, you purify the water by passing it through the UV chamber and UF membrane. Nevertheless, you do not remove the heavy metals like arsenic, lead, or mercury. Theoretically speaking, you contaminate the water purified by the RO process.

The Mineralizer differs in the sense that it infuses the lost minerals alone and this certainly does not include the heavy metal impurities like arsenic, lead, or mercury.

This is not to say that the TDS controller is ineffective or anything of that sort. Both TDS controller and the Mineralizer have their importance in the water purification process.

Chaithanya Vanjari
Chaithanya Vanjari
I'm Chaithanya Vanjari, the Creator and Editor-in-Chief at KitchenArena. With a decade of experience in evaluating large appliances like air conditioners, washing machines, refrigerators, and various small home devices, I possess the technical expertise needed to thoroughly review and understand the operational complexities of these appliances.


  1. I am having aquaguard duo since last 8 years. It’s TDs is 32 ph is below seven…Kindly suggest me the best water purifier with ro uv mineralizer having TDs approx 70 and ph 8.5

    • You have to select the water purifier according to the TDS levels in your water source. What is the TDS of the unpurified water? If the value is below 400ppm, there is no need to use an RO water purifier, you can simply install a UV water purifier that removes the bacteria and virus.

  2. I need help here…..I am confused to buy a RO system (brand)….I need suggestion on latest technology RO system in market with very good sales and support….budget is not an issue.

    • Reverse Osmosis is a traditional process that removes the TDS (Dissolved Salts) From the water. Some of the brands offer technologies like Zero water wastage (By sending the discharge water into storage tank) Copper Guard and some models add minerals back to Purifier RO water. The top models are mentioned in this post, please have a look. Kent, AO Smith and Aquaguard are the best selling brands and offer Good Support.

      • Thanks for a super quick response…….how about Eureka Forbes Aquasure Smart…whats your opinion ////also does copper helps in RO..?

        • Aquasure Smart is an excellent UV water purifier but there is not storage tank. If there are power cuts in your place, it is better to go for a model that comes with a Storage tank. Checkout the below ones.

          Kent Ultra UV
          Kent Maxx UV + UF
          AO Smith Z1 UV


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