When it concerns the field of water purification, there are many abbreviations noticeable on the relevant platforms. RO, UV, UF, MF, NF, etc.; it can get a little complicated.
Whether it’s a service center, display room, or online material, these terms seem to be all over. While there are particular common elements throughout each of these terms, they are all very various.
Another abbreviation frequently discovered connected with combined water filtration systems is MTDS. This short article discusses exactly what MTDS is and why it works.
What is MTDS in Water Purifier?
MTDS means Manually Total Dissolved Salts controller. It is a regulator present in select RO designs of different water purifier brand names. The function of this gadget is to change the TDS level in the output water from the cleanser. It is not a filter or screen.
It is an accessory indicated for RO systems as these purifiers tend to eliminate nearly all TDS from water. This can be an undesirable result as the perfect level for TDS is between 100 to 300 PPM.
A level listed below 100 PPM is not suggested as that water lacks necessary minerals and salts needed by the body. A level between 300 PPM and 900 PPM is still appropriate.
However, TDS levels above 900 PPM are unfit for human consumption.
Having an MTDS regulator, together with your home’s water purification systems, gives you control over this level. It is a small gadget that connects to the purification system towards completion.
The specific place depends upon whether the system is just RO or a mix of RO, UF, and UV. Depending upon the location, the MTDS regulator is supplied with water from two inlets.
One originates from the RO, and the other comes from a various source based upon what types of filtration approaches are being utilized. When the system utilizes reverse osmosis, the 2nd input originates from the triggered carbon filter.
With RO+UF, the 2nd input comes from the UF filter. According to the setup, if the system likewise has UV, the 2nd filter comes either from the triggered carbon filter or the UF filter.
When water travels through the MTDS regulator, it goes through the UV filter. The idea behind these arrangements is the mechanism of the MTDS regulator.
It is a gadget that controls the water circulation from both these inputs.
If the TDS level needs to be reduced, the RO water circulation is increased. If the TDS requires to be increased, the second input water flow is increased. By doing this, the MTDS regulator stabilizes the circulations to give the optimum TDS level.
This is an effective system as the water before the RO filter is without suspended pollutants. For that reason, it is tidy except for the dissolved salts and minerals. When the system is complemented with a UV filter, it takes the water from the MTDS.
This input, now with the best TDS level, is treated for bacteria present in the water. The outcome is purified water with the preferred quantity of salts and minerals. The following diagram represents the input and output streams of the MTDS controller.
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1. Advantages of MTDS in Water Purifier

The MTDS regulator offers the human body with the required salts and minerals by enhancing the TDS level of drinking water. The kept liquified solids assist improve the pH of the water according to bodily needs.
This likewise enhances the taste of the water. Ordinary RO water tends to have a bland taste. The right TDS level lets water taste like it is suggested to.
The MTDS controller likewise avoids the TDS from being too high, which produces a brackish taste. Because it can be by hand changed, the taste can be changed to suit the distinct requirements of house owners.
The most significant benefit of a device like the MTDS regulator is that it is highly economical. It can change the TDS of water at just a small cost, practically undoing among the cons of reverse osmosis.
2. Limitations of MTDS in Water Purifier

MTDS regulators have a really easy operating system, which is inexpensive and convenient. Nevertheless, this mechanism does not get rid of heavy metals from the water.
As 2 streams are going into the controller, and one of them comes from pre-RO treatment, the metals remain. This is not a suitable gadget if the supply water contains compounds like lead, copper, or arsenic.
Another downside to an MTDS regulator is that it is rather hard to gain access to. Some purification systems require the elimination of a side panel to reach the MTDS controller.
However, other designs have it in a more accessible area.
Depending on the MTDS regulator’s design, it can be adjusted by hand or by a screwdriver. It’s a little difficult to change the TDS level in some cases, and it might take duplicated trials to get it right.
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When To Use MTDS In Water Purifier
An MTDS regulator needs to be used if the supply water comes from different sources. Even if these different sources have varying TDS levels, this controller can adjust them to suitable levels.
If you are utilizing an RO in the very first location, it suggests the TDS level of the supply water isn’t safe. However, the RO reduces this level to listed below 100, which’s why an MTDS controller works.
However, one ought to get their supply water tested in a lab to look for heavy metals. If the water includes lead, mercury, or arsenic, an MTDS regulator is not enough. Because case, an additional mineral cartridge is a much better option.
Summary
An MTDS regulator is a by adjustable hand gadget that controls the TDS level of an RO system’s output water. It is fed water from the RO filter and a filter stage right before the reverse osmosis stage.
The MTDS gadget regulates various water sources’ flow rates to either boost or reduces the TDS level. This controller is rather cheap and can be set by hand or by a screwdriver.
Having a regulator like this in a water filtration system enhances the taste and pH of water. It offers the correct amount of salts and minerals in drinking water. Nevertheless, this gadget is unsatisfactory if the supply water contains heavy metals.
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