What is mi measured in a water filter? Review of water hardness tester from Xiaomi - Xiaomi Mi TDS Pen

Probably many have heard the lamentations of relatives and friends about the poor environment - poor quality of water, air, food, etc. Of course, there is some truth in this, but how to check it? How do you know which water is better, from the tap or brought from a spring?

Not everyone can answer this question sensibly; we usually hear that the water from the spring is natural and does not contain any chemical impurities, unlike tap water.

Everything seems logical, but you can’t take someone’s word for it when you can easily check it with this small water tester from Xiaomi:

What is TDS?

Total dissolved solids (total number of dissolved particles) is a unit of measurement of total mineralization, measured in parts per million and designated PPM (parts per million). If we round up a little, then 1 ppm = 1 mg/l, respectively, 1 gram dissolved in a liter of water = 1000 ppm.

What level of impurities is considered normal?

It turns out that the lower the value, the fewer impurities the water contains.

Of course, there is a rumor on these Internets that distilled water (impurity value less than 5ppm) “washes salts” from the body, but scientists assure that this is not entirely true. Salts enter the body not only with water, for example, there are a lot of them in food, and in order to cause a deterioration in well-being, it is necessary long time drink distilled water and do not eat anything.

If the TDS level in water is between 50-400 ppm, then the water is excellent for drinking, and if it is more than 600, then it is better not to drink it without preliminary filtration. And the hero of this review - Xiaomi Mi TDS pen - will help us find out this level.

Xiaomi water tester review

The body is similar to other water testers and resembles a pen or marker. From the button and screen controls:

The device is powered by 2 one and a half volt batteries; to replace them you need to remove the top cover.

The device does not have full protection against water, so you should not completely immerse it in water.

It also does not have communication modules, so connect it to smart home will not work.

Characteristics of Xiaomi Mi tds pen

To measure the content of impurities, the device has a special probe with 3 contacts:

Plump is responsible for measuring temperature; its indicators are necessary when calculating the impurity content. And 2 titanium conductive antennae electricity. The fact is that the more impurities in the water, the better it conducts current, and from this value it is calculated general meaning TDS.

This technology is capable of detecting 3 types of impurities:

1. Soluble salts: calcium, magnesium ions, etc.

2. Ionic organic compounds: ammonium acetate, sulfates, etc.

3. Heavy metal ions: chromium, zinc, lead, copper, etc.

Salts usually take over most of it, which is why the device is sometimes called a salt meter.

Xiaomi water tester instructions in Russian

You need to clearly understand what the tester can show and how to use it correctly. Many people rush to check mineral water, and then are surprised that the device rejected it high value TDS. Mineral water is water with a large amount of dissolved salts and trace elements, which is what the device shows.

The tester must measure fresh water, which flows from a water supply tap, from a well or spring. If you added something secondary to the water, for example, brewed tea, then the TDS value will go off scale; many people immediately run to the Internet to crap about the uselessness of the device, without fully understanding the principle of operation.

To take a measurement, you need to press the device button and lower its contacts into water for a few seconds. The TDS value will appear on the device screen. Actually, that's it, there are no tricks. Some testers require you to calibrate the device, but Xiaomi does not require this.

Now let's see what I managed to measure.

Xiaomi measurements

The first thing you want to measure is the water that flows from the tap.

191 ppm, not so bad (I measure tap water in the city of Vladimir). Indicators of impurities in cold and hot water approximately the same. How much can you trust these indicators? I decided to test it with distilled water, the result is a little predictable:

1 ppm means Xiaomi tester quite accurate. Let's experiment a little, I threw a piece of sugar into the same water and stirred:

Now the value is 3 ppm, almost no increase. And all because the tester measures insoluble impurities, and sugar is completely soluble in water. Refresh the glass with new distilled water and add Rolton noodle seasoning:

149 to the 10th power, or 1490 ppm. Can I drink it? Of course you can, but the water will already have a specific taste and smell. Well, in the finale, I passed this slurry through a regular charcoal filter jug:

It cleaned quite well, I expected a weaker result. Apparently the new carbon cartridge helped. You can clean it even more strongly with a filter with the reverse osmosis cleaning principle; according to rumors it cleans up to 15-30 ppm, but I don’t have one and can’t check it :)

What to do if the impurity content is too high?

If, when testing your water, you have consistently high TDS readings, then you need to think about a water filter. Best performance provides a reverse osmosis filter, or in extreme cases you can take a carbon filter. Xiaomi has such filters.

General characteristics

Additionally

Check the water quality in your home

We cannot visually determine how pure the water we drink is. At first glance, clean, clear water may contain various impurities. TDS refers to the total amount of dissolved solids in water. The degree of mineralization to one degree or another affects the quality of water. The lower the TDS value, the lower the concentration of heavy metal ions and soluble salts, and, accordingly, the better the quality of drinking water.

The TDS tester from Xiaomi can accurately determine the degree of mineralization of water. According to World Health Organization (WHO) standards, water suitable for drinking should not exceed a TDS value of 600 mg/l. At a mineralization level of 1000 mg/l and above, a change in the taste of water occurs.

Timely checking of water quality in your home

Water quality can vary from region to region and even from home to home. The TDS tester from Xiaomi will help you determine the exact content of impurities dissolved in water. You can conduct tests both before and after water filtration, so you can evaluate the quality of the water purification devices. Generally, a low TDS value has low soluble content, which means the water is clean and safe to drink.

High-precision technologies are the key to high-precision results

Monolithic waterproof housing, low power consumption chip

The use of a TDS tester can significantly affect our water consumption patterns. Conscious of responsibility and striving for error-free measurements throughout the entire service life, we pay great attention to detail and use high-precision technology.

The tester body is created using injection molding technology, and the measuring probe is made of stainless material (titanium). The device is also equipped with an external sensor for automatic temperature compensation (0 ~ 80°C). The design of the case is limited to the button and display and does not include any holes, which ensures water resistance and prevents the tester from being damaged by splashes or water leaking into the case.

To save battery power, the TDS tester automatically turns off if not used for more than two minutes. The power source is two AG13 round batteries, which can be replaced at any time. The device weighs only 27.4 g and has a compact ballpoint pen design, making it easy to take with you.

Instructions: Water quality tester

TDS tester is a device used to check the composition of water, namely the content of dissolved solid elements in it. After filtering the liquid in the RO filter, the level of solids can be reduced.

Concept of TDS

TDS is an abbreviation for the content of dissolved solids in water. The indicator assumes the content of substances in milligrams in one liter of water. Unit of measurement: mg/l. TDS also indicates the amount of organic elements, large solids and mineral salts.

Tester operation

• Remove the cap, activate the power button and fill the tester cap 2/3 with the water you want to test;
• Insert the device into the cap filled with water, shake it gently to remove air bubbles;
• Wait a few seconds, the screen will display indicators that show the quality of the tested water.​

Liquid Quality Values

Important! If the TDS indicators exceed 999, a multiple of x10 is applied.

The lower the device shows, the less solids the water contains, which means the water is clean and suitable for use.

• After testing the water, dry the cap of the device, then close the cap of the tester and turn off the power.

Power supply

If the device does not turn on, no data is displayed on the display, the batteries must be replaced. To do this, open the battery pack, remove the used batteries and install new ones.

Operating rules

1. Do not expose the device to direct sun rays and precipitation. It is not recommended to leave the tester in areas where heat and increased humidity levels.
2. Handle the product carefully to avoid dropping it, which could cause malfunctions.
3. Water has a detrimental effect on the device.
4. You should not try to fix breakdowns, change the design or disassemble the tester yourself.
5. The device is not suitable for gaming.
6. Do not throw used batteries into fire.
7. Incorrectly selected batteries (with low power) can negatively affect the operation of the tester. Thus, soluble solids in water may be incorrectly identified.
8. The tester is not suitable for measuring the quality of water with temperatures above 80°C.
9. The device is not able to accurately determine the quality of water that is not collected in the container. That is, the quality of, for example, water flowing from a tap cannot be determined.

Delivery within Moscow + 10 km from MKAD
Attention!

Delivery across Russia

Equipment is dispatched no later than the next day after receipt Money to the seller's account

If you do not have an elevator, there is a fee for going up to the floor: from 50 to 200 rubles, depending on the size and weight of the cargo. If the package does not fit into doors and staircases, the technician will suggest lifting/transferring it in parts, having first opened the package. Payment occurs BEFORE opening and before the start of lifting/transferring the package. After opening, it is necessary to check the equipment for external damage; supervision over the accuracy of lifting after opening is the responsibility of the client.

The customer can carry out lifting work independently after paying for the simulator.

Still have questions? Call toll free number: 8-800-1000-682

Warranty repairs and returns

Every product purchased in our store is covered by the manufacturer-distributor's warranty. Warranty and service maintenance takes place in specialized service centers, which you can find out about in the warranty card, the basis for providing warranty service are documents that are necessarily transferred to the buyer when purchasing any equipment by a specialist, courier, or forwarder delivering the equipment.

During warranty period The manufacturer provides free repair of manufacturing defects and defects that appeared during operation, provided that the Buyer complies with all conditions and rules for transportation, storage, installation, configuration, maintenance and operation of the equipment established by the Supplier. Repair work performed by an authorized qualified representative of the Supplier.

Any damage to the equipment, its components, assemblies and mechanisms caused by non-compliance with the terms and conditions of the Supplier for transportation, storage, assembly, configuration, maintenance or operation of equipment. Self-repair, changes or modernization of equipment, replacement of original parts performed without the written permission of the Supplier. Damage to equipment due to force majeure, including natural, man-made and social emergencies, unlawful intentional and careless actions of persons aimed at causing harm to equipment.

Keep the waybill, cash receipt and a warranty card. Transport, store, assemble, configure, maintain and operate the equipment in strict accordance with the Maintenance and Warranty Repair Manual, Operating Instructions and other recommendations of the Supplier. Notify the Supplier's service department about detected defects within 3 working days after discovery of the defect

Instructions:

For of this product no instructions.

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