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The thing is probably useful, but not in all regions, a fact. It’s good if you have water with salts, acids, you definitely need it. But if you have a high iron content, and the water is soft, which is bad, then it will not react. Don’t even try to refute I live in the Tyumen region. I bought this device. Water is simple excellent, according to his testimony! And the filters are rusty. There is a water treatment system developed by UPI. So after it, the salt meter shows water worse than before. in other regions and is useful. Management response: Good afternoon! The device shows objective data, regardless of your opinion regarding the filtration system. In your case, the "secret" of increased readings after "cleaning" is very simple: in the system itself, salts are added to the solution. This can be a mineralizer cartridge (usually contains sodium polyphosphate) or ion-exchange columns (replace the "wrong" salts with the "correct" ones). The device does not show a change in the composition of water, it only shows the total salt content, which is why it is called a salt meter. For more information, you can find out by calling the free hotline 88007752564

750 ₽

TDS meter is a handy pocket device that is designed for household measurements of water quality from various sources: membrane or flow filters, jugs, wells, wells, pools, aquariums.
It is also used in the preparation of various solutions and water purification for hydroponics.
Supplied in a protective case made of high-quality leatherette with a clip for attaching to a belt.

Vendor code: 245 Categories: , Delivery: SDEK, Russian Post, Courier in Novosibirsk It is also used in the preparation of various solutions and water purification for hydroponics.
Using the TDS meter, you can check the quality of drinking water at home, at work, while traveling and on vacation at any time. Equipped with a thermometer.
Supplied in a protective case made of high-quality leatherette with a clip for attaching to a belt." />

Water quality analyzer TDS-3

TDS meter - a reliable electronic device for testing the quality of drinking water

A TDS meter, or in other words a salt meter, is a device for determining the amount of dissolved impurities in water, that is, its level of contamination (or hardness). The abbreviation TDS stands for Total Dissolved Solids - the total content of dissolved solids.

If you have any questions - call or write to us right now!

Specifications Salt meter TDS-3:

Delivery set of TDS-3 Water Quality Analyzer:

• TDS meter (salinometer) TDS-3 – 1 pc.
• Case for carrying and storage - 1 pc.
• Instruction - 1 pc.

Manufacturer information and warranty:

• Manufacturer's Warranty: 1 year
• Manufacturer: Kelilong Co.,Ltd
• Country of origin: China

Benefits of buying a TDS-3 Water Quality Analyzer in our AlfaEco store:

• Free delivery in Novosibirsk when ordering from 7000 rubles, as well as sending throughout the Russian Federation, taking into account your wishes.
• Courier delivery in Novosibirsk on the day of order. At your request, the courier will demonstrate the operation of the device and answer your questions.
• Your item will arrive safely. We manually check each item and pack it securely before shipping.
• If there is a problem with the device, we will exchange or return the money, without any difficulties.
• A wide range of payment methods: bank cards, electronic money, cash, cash on delivery.
• We periodically hold interesting promotions and provide discounts for repeat purchases.

Hello, today we will talk about the hardness of water measured using a TDS meter or saline meter. This device has already been repeatedly reviewed on the site, but since I live in the foothills of the Caucasus, I had an idea to go camping with this device and measure the hardness of water in a mountain river, mountain stream, forest spring. Therefore, I am going on a real trip and I invite you to a virtual one. Well, I will measure rain, store-bought mineral, bottled non-mineral and tap water. Interesting? Then we read further.

Water hardness - a set of chemical and physical properties of water related to the content of dissolved alkaline earth metal salts in it, mainly calcium and magnesium (the so-called "hardness salts"). (wikipedia)

That is why this device is also called a salt meter. TDS stands for and translates as Total Dissolved Solids - the total content of dissolved solids.
Water hardness is exactly what is responsible for the scale in the kettle and kidney stones.
Let's run a little on the device itself.
On the front there is an on/off button, a reading hold button and a reading display.


At the bottom under the cap are two electrodes that are lowered into the water


On the back there is a clip and a calibration screw

The cap has a built-in battery compartment for two LR44 batteries

The measurement is done like this: Turn on the device, it shows 000, lower the electrodes into the water and look at the value.
The indication is three-segment, if the value is greater than 999, then the x10 sign appears below.
The device measures ppm in American units, in Russia we have a unit of milligram equivalent per liter, mg-eq / l.
1 meq/l=50.05 ppm
According to Sanitary norms and rules under the number SanPiN 2.1.4.1074-01
the maximum allowable concentration is 7 mg-eq/l. or 350ppm
we will rely on this value, I will also give you such a table, you can also trust it


This instrument is calibrated with a special calibration liquid in which the value of the salt content is known in advance, this instrument is already calibrated by the seller.
The temperature of the water during measurements does not play a special role, since the following property is declared in the characteristics of the device:

Auto temperature compensation

Let's start with room glass measurements.
Drinking tap water

It is also boiled, as you can see, the salt content is slightly lower, boiling softens the water.

Rain water, just went to the balcony and collected water running down from the roof during the rain.

Bottled water from the cooler, it is stated that it is melted, glacial, I do not specifically show the manufacturer.


sparkling mineral water from the store, I don’t know why such indications. This water is extracted from a well, it is enriched with all sorts of elements, which may be why.


Well, now on a hike, our first mountain river

this is what it looks like

Here are the testimonies

In the process of measuring, I threw a bait a couple of times, hoping to catch trout, no luck.

But here is such a plotvichka.

The next one is a spring in the forest. It is believed that this spring has very clean water, many locals collect this water for drinking, and cook only from it. There is even a story that someone took water from it to some kind of scientific research institute, they did an analysis there and said that the water is unique, it can raise the dead, I personally don’t believe it.
I was distracted, so I forgot to take a picture, the readings were 60 ppm, there is this spring at the bottom of the video.
What is characteristic is almost the same as in the river in which I measured earlier, the river flows from the spring about half a kilometer, I have suspicions that this is the same water, only due to filtration through the soil, it looks crystal clear in the spring.
The next place in line is a small mountain stream with a small 2-meter waterfall.

Here are the views on the way to the waterfall

And here is the waterfall

measurements


there are splashes at the bottom, water scatters in all directions, so it was not convenient to take measurements, but nevertheless I measured it and the result was very surprising, I couldn’t take it normally in the photo, but in the end the result was over 1000 ppm, the inscription x10 blinked from the left. Why such high readings in this stream, I do not know, it flows higher from the cave, perhaps for this reason.

In conclusion, I will say that the device is mainly needed in everyday life by the owners of filter systems in order to determine when it is necessary to change the filter element.

Video of the trip through the reservoirs on my youtube channel, if you are interested, be sure to subscribe.

Also unboxing video.

Goodbye. I plan to buy +65 Add to favorites Liked the review +55 +109

The chemical composition of water is different due to various impurities in it. The TDS meter allows you to measure the concentration of these impurities. Most often, the liquid contains salts of inorganic origin, as well as a small amount of soluble organics. Due to the presence of these substances, the smell and taste of water changes. In addition, water of different composition affects animals, people and equipment in different ways.

Operating principle

The operation of the measuring device is based on the ability of water to conduct electric current. The device produces electrons that create an electric field in the liquid. Then he fixes the number of ions of salts and other substances, since it is they who affect the strength of the current in the liquid. All study data are shown on the display. Thanks to the research, you get accurate data on the composition of water and the degree of its saturation with salts in seconds.

To understand how to interpret the results of measurements, you need to know that the device shows the number of impurity molecules in a million water molecules. Thus, it turns out that the measuring device counts the number of impurities in one liter of water in milligrams.

However, you should not think that if the device showed the result “0”, this is the purest water suitable for consumption. For example, after testing car oil, the result will be "0", and after testing distilled water with a few salt crystals, the instrument will show a large number. Although in the first case, the liquid cannot be consumed, but in the second case, you can safely drink such water.

To carry out the measurement, you need to pour water into a small container and lower the electrodes of the saline meter there. After a second, the result will appear on the LCD display of the device.

Characteristics of the salt meter

Characteristic	Index	Unit
Salt Pollution Rating Scale	0-9990 molecules per 1 million water molecules	mg/l
Estimation of water hardness (by translation of display data)	1 dH = 17.8 ppm, 1 f = 10 ppm, 1 meq/L = 50.05 ppm CaCO3	dH
Temperature rating scale	0-99	°С
Scale unit	One particle per million water molecules	—
Error	+2	%
Energy supply	Batteries included (2X1.5)	—
Life time	more than 1000 hours in continuous operation	—
Dimensions	14.2x2.5x1.5	cm
Weight	36	G

Using the TDS meter and setting it up

The device does not require special care. If necessary, it is required to replace the batteries and wipe the electrodes with distillate or alcohol.

The purchased device has all factory settings. However, if you doubt the accuracy of its measurements, you can use a solution of salt in water to adjust. To adjust the device, you need to use the digital setting button or the wheel for manual adjustment. As a rule, a newly purchased device does not require such a procedure, since it can retain the results of the factory settings for a period of 1 to 2 years.

Application area

Saltmeter can be used for different purposes. Below we list the most common situations where the use of a TDS meter is necessary:

1. In swimming pools, very hard water can cause pipes to rust. Therefore, it is also important here to control the concentration of salts, which cannot be done without a salt meter.

In general, I needed to know when to change the filter, for this reason such a simple indicator was purchased. I do not take this device as a serious one, but strangely enough, it does its job completely and this is more than enough.

But let's talk about everything in order.

Appearance

The device comes in a white cardboard box, nothing special.

The kit contains instructions, two AG13 batteries, and a water hardness tester.

At the end of the device there are two electrodes that work on the principle of measuring the resistance of water:

Machine Menu and Units

- The device is able to measure and record current indicators.
- The measurement takes place in units - milligram per liter (mg / L), or also units compatible with them - parts per million
(PPM).
- Able to receive data on the temperature of the measured liquid (in Celsius and Fahrenheit).
- The device is calibrated from the factory, but it is possible to calibrate manually.

Device calibration

The device itself is calibrated from the factory to 342 ppm, this value is taken as an average level sample, which is recommended for use when performing a procedure for measuring high ppm values.

Manual calibration of the device is done by long pressing the button TEMP until 000 starts flashing on the indicator, then the device is installed in the measured liquid and within 10-15 seconds we wait for the values ​​to be received, then press the button HOLD and again on the button TEMP.

Some experiments and a bit of theory

On January 1, 2014, Russia introduced the interstate standard GOST 31865-2012 “Water. Unit of hardness. According to the new GOST, stiffness is expressed in degrees of hardness (°F). 1 °F corresponds to the concentration of the alkaline earth element, numerically equal to 1/2 of its millimole per liter (1 °F = 1 mg-eq / l). In different countries, various non-systemic units were used (sometimes still used) - degrees of hardness.

Methods for eliminating water hardness:

• Thermal softening. Based on boiling water, as a result, thermally unstable calcium and magnesium bicarbonates decompose with the formation of scale:
  Ca(HCO3)2 → CaCO3↓ + CO2 + H2O.
  Boiling removes only temporary (carbonate) hardness. Finds application in everyday life.
• Reactive softening. The method is based on adding soda ash Na2CO3 or slaked lime Ca(OH)2 to water. In this case, calcium and magnesium salts pass into insoluble compounds and, as a result, precipitate. For example, the addition of slaked lime results in the conversion of calcium salts into insoluble carbonate:
  Ca(HCO3)2 + Ca(OH)2 → 2CaCO3↓ + 2H2O

  The best reagent for eliminating the general hardness of water is sodium orthophosphate Na3PO4, which is part of most household and industrial preparations:
  3Ca(HCO3)2 + 2Na3PO4 → Ca3(PO4)2↓ + 6NaHCO3
  3MgSO4 + 2Na3PO4 → Mg3(PO4)2↓ + 3Na2SO4

  Orthophosphates of calcium and magnesium are very poorly soluble in water, so they are easily separated by mechanical filtration. This method is justified at relatively high water consumption, since it is associated with the solution of a number of specific problems: sediment filtration, accurate dosage of the reagent.

• Cationization. The method is based on the use of ion-exchange granular loading (most often ion-exchange resins). Such loading, upon contact with water, absorbs cations of hardness salts (calcium and magnesium, iron and manganese). Instead, depending on the ionic form, it releases sodium or hydrogen ions. These methods are respectively called Na-cationization and H-cationization.

  With a properly selected ion-exchange load, water hardness decreases with single-stage sodium cationization to 0.05-0.1 °J, with two-stage - up to 0.01 °J.
  In industry, with the help of ion-exchange filters, calcium and magnesium ions are replaced with sodium and potassium ions, obtaining soft water.

• Reverse osmosis. The method is based on the passage of water through semi-permeable membranes (usually polyamide). Together with hardness salts, most other salts are also removed. The cleaning efficiency can reach 99.9%.
  There are nanofiltration (the conditional diameter of the membrane holes is equal to units of nanometers) and picofiltration (the conditional diameter of the membrane holes is equal to units of picometers).

  The disadvantages of this method should be noted:
  - the need for preliminary preparation of water supplied to the reverse osmosis membrane;
  - relatively high cost of 1 liter of produced water (expensive equipment, expensive membranes);
  - low salinity of the received water (especially during picofiltration). The water becomes almost distilled.

• Electrodialysis. It is based on the removal of salts from water under the action of an electric field. Removal of ions of dissolved substances occurs due to special membranes. As well as when using reverse osmosis technology, other salts are removed, in addition to hardness ions.
• Distillation: Water can be completely purified from hardness salts by distillation.

Some experiments

For testing, I bought some drinking, bottled water, there is mineral and plain drinking water, and I also decided to put this indicator into soda and alcohol, as well as tap water and water after the filter.

Water testing took place at an ambient temperature of 25 degrees Celsius:

Testing tap water before filtration:

Testing tap water after filtration:

Drinking water testing non-mineral:

Mineral drinking water testing:

Soda Water Testing:

Alcohol testing (medical 96%):

Conclusions:

As a display meter, very funny for that kind of money. This device is enough for the eyes to track the deterioration of water filtration.

According to the experiments with mineral water, we can say the following, it really should not be drunk in liters. In water with a high sugar content, the device also goes off scale, I can’t explain it exactly, I hope you tell me in the comments.
And alcohol, my alcohol is pure, yes 8)

This is such a fun gadget. There will be no disassembly due to the sealed, sealed case, it was bought for its own. Well, in general, I was glad to know that I have more or less water (Ekaterinburg, Elmash district).

The product was provided for writing a review by the store. The review is published in accordance with clause 18 of the Site Rules.

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