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1. KENT Supreme Plus Alkaline+Copper RO Water Purifier

1. Multi-Stage Filtration Architecture

This model uses a 7-stage purification process. From a technical perspective, the sequence is very robust (strong and reliable):

• Sediment Filter: Blocks large particles like sand and rust.
• Carbon Filter: Absorbs chlorine and organic impurities (bad smells/chemicals).
• RO Membrane (Reverse Osmosis): The core component. It removes dissolved salts and heavy metals (like Arsenic and Fluoride) down to $0.0001 \text{ microns}$.
• UF Membrane (Ultra-Filtration): With a pore size of $0.01 \text{ microns}$, it physically filters out bacteria and cysts without using electricity.
• UV In-Tank: A UV LED is installed inside the storage tank to “re-purify” the water continuously, preventing bacteria from growing in stored water.

2. TDS Control & Mineral Management

The biggest feature for technical users is the TDS Controller (Modulator):

• Function: The RO process often removes all minerals, which can make water acidic. Kent’s TDS controller bypasses a small amount of water through the UF membrane and mixes it back with the RO water to keep essential minerals.
• Alkaline & Copper: This stage maintains the water $pH$ level between $8.0 – 9.5$ and infuses Copper ions, which provide antioxidant benefits.

3. Power Consumption & Electrical Specs

• Power Rating: Total power consumption is approximately $60 \text{ Watts}$ when the pump and UV lamp are active.
• Operating Voltage: Works between 100 – 300 \text{ V AC}, which is very versatile for Indian voltage fluctuations. It includes an internal SMPS to protect components from short circuits.
• Duty Cycle: It has a purification capacity of 20 \text{ Liters/hour}. This means it takes about 25 minutes to fill the 8L tank, ensuring high energy efficiency.

Feature	Pros	Cons
Purification	Fast water purification ($20$ liters per hour) and double protection from UV rays.	Multiple filters ki wajah se annual maintenance cost high hai.
Water Quality	The alkaline filter keeps the $pH$ level balanced.	Reject water ratio 1:3 hai (3 liter waste par 1 liter pure).
Safety	It has a built-in alarm system for filter changes and UV failure.	Low water pressure ($<0.3 \text{ kg/cm}^2$) par external pump ki zaroorat hoti hai.
Build	Food-grade, non-breakable plastic tank.	Fully electronic hone ke karan power cut mein purification band ho jati hai.

2. Native M2 Pro Water Purifier by Urban Company 

1. Advanced 10-Stage Filtration Architecture

Instead of the standard 7 stages, this purifier uses a 10-stage process. Its filtration system is very advanced:

• Multi-micron Filter: It filters particles based on their size to prevent clogging (blocking of the filters).
• RO Membrane: The main filter that removes tiny particles, heavy metals, and dissolved salts down to $0.0001 \text{ microns}$.
• UV + UF Layers: Uses UV (Ultra Violet) and UF (Ultra Filtration) to completely kill bacteria and viruses.
• Copper-Charged + Mineraliser: After purification, this stage adds Copper and balances essential minerals in the water.
• Smart Rinse Technology: The best technical feature is “Auto-clean,” which automatically cleans the membrane. This allows the filters to last for 2 years without needing service.

2. TDS Control & Alkaline Performance

• TDS Capability: This purifier is designed to handle high TDS water up to $2500 \text{ ppm}$ (suitable for Borewell or Tanker water).
• pH Management: It has a special Alkaline stage that balances the $pH$ level, so the water does not become acidic and stays healthy.
• Real-time Monitoring: Since it is IOT enabled, you can check live TDS levels and filter health on the Urban Company App.

3. Power & Electrical Specifications

• Smart Dispensing: It features a Touch-pad to choose how much water you want (Glass, Bottle, or Continuous flow).
• Power Requirement: It needs electricity to dispense water. However, there is an option to add a Native UPS to use it during power cuts.
• Voltage Safety: It has a smart circuit system that protects the internal electronics from voltage fluctuations.

Feature	Pros	Cons
Maintenance	Filters last for 2 years with zero service costs (unconditional warranty).	If you need to change parts after 2 years, the total cost could be high all at once.
Smart Tech	App monitoring, TDS tracking, and auto-clean technology.	The purifier depends completely on the App and electronics (Technical complexity).
Convenience	Automatic dispensing (you don’t have to stand and wait to fill a glass or bottle).	You need an extra UPS to get water during a power cut.
Build	Slide-out tray and guide light (makes it easy to fill water at night).	The size ($24.5 \text{ inches}$ high) is bigger than standard purifiers and takes up more space.