Those who know more work more efficiently

Those who know more work more efficiently

How well is my pure water filter working? Is the water quality alright? When do I need to replace the resin? A TDS meter provides the answers to all of these important questions.

A TDS meter is a digital measuring device. Professionals can use it to check how many total dissolved solids (TDS for short) are contained in the water. This includes minerals, for example. The TDS value is measured in parts per million (ppm).
Checking the mineral content is a crucial factor for any form of work with pure water. If there are too many solids contained in the water, unsightly traces of lime and streaks may be left behind on the glass surface. The water is 100 percent demineralized when the TDS ppm value is equal to zero.
The following basic rule applies: the water should have a TDS output value of 0 ppm when cleaning windows. When cleaning non-reflecting surfaces of a façade, the TDS value can be a maximum of 20 ppm. If residues (spots) are still left behind at these output values, this means that the resin must be replaced. The same applies if the TDS exceeds the recommended output values.
UNGER tip: most residues come about because the surface has not been rinsed properly after cleaning. Thoroughness really does pay off here.

TDS_MeterWhat kind of TDS meters are there?
TDS meters are available in different versions:

1. Hand-held TDS meters
Hand-held TDS meters take a similar form to fever thermometers. They can be used flexibly and are able to measure both tap water and filtered water.

2. Integrated TDS meters for output water
TDS meters are generally permanently installed on larger stand-alone filtration systems. However, these often only measure the filtered water to ensure that the user knows when he/she needs to replace the resin.

3. Integrated TDS meters for input and output water
There are also higher-quality, permanently installed TDS meters which display both the input and output values. It is generally recommended to measure the input value, because the degree of hardness of tap water varies from region to region. The higher the degree of hardness, the greater the required filter capacity and the greater the resin consumption of a pure DI filter. When checking the input value, the different ppm values are quick and easy to identify. This means that it can be approximately estimated how far the resin will go. An RO filter is recommended if the ppm values are high and the system is regularly used.
Practical: the UNGER RO40C pure water filter is equipped with a TDS meter for input and output water. Professionals can thus check the resin and water quality at any time and keep the performance of their filters high over long periods of time.RO40C-P2-M-path


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