Tpms tire pressure sensors with monitor. TPMS (Tire Pressure Monitoring). Why is incorrect tire pressure dangerous?

Checking the tire pressure of a car at least once a week will seem to many drivers to be quite sufficient concern for the wheels, but this is only at first glance.

Why do you need to monitor tire pressure?

Experienced drivers understand that low tire pressure can lead to increased tread wear.

Therefore, the daily control over this indicator in each wheel, in the future, will largely positively play on saving the budget.

To alleviate the fate of the driver and give him the opportunity to control every second not only the pressure in the tires, but also the temperature in them, a special device was developed, which we will talk about further.

TPMS system(English Tire Pressure Monitoring System), which many motorists simply call the wheel pressure sensor, is a system designed to monitor pressure and temperature in car tires.

Its main purpose is to continuously measure and display information, as well as to immediately alert the driver that there has been a drop in pressure or a critical change in temperature in the tire / tires of the car.

Such a system is installed as in the form of factory standard equipment.

So it can be installed additionally in a car service.

With TPMS, you can save up to 4% fuel, improve driving safety, and reduce wear on tires, rims and car suspension parts.

In the US and EU countries, the presence of such a system is mandatory.

American studies have shown that TPMS reduces the risk of fatal accidents by up to 70%, caused either by the fact of a puncture of the wheel with subsequent dismantling, or by overheating of the tire, which led to the explosion of the latter.

Russia has recently launched its own development called Tire Keeper - see the video at the end of the article.

Types of TPMS

TPMS systems can be implemented in two ways. The main difference between them is the types of measurement, the features of which will be discussed in more detail below.

There are also structural differences in the way the sensors are installed on the wheel, which can be both internal and external.

The first option will require a tire fitting for installation.

The second allows you to screw the specified sensors onto the nipple, replacing them with a protective cap or valve.

It should be noted that tire pressure monitoring systems are produced for both passenger cars and trucks, buses and minibuses.

The main difference for trucks and commercial vehicles is that the installation kit can contain more sensors, and the sensors themselves are designed for more difficult conditions exploitation.

IMPORTANT: It is unacceptable to install TPMS on machines with increased carrying capacity for passenger car!

Device and principle of operation

The principle of operation is quite simple. An internal or external sensor mounted on the wheel measures the temperature and pressure in the tire.

The specified sensor has a built-in short-range radio transmitter, which transmits the received information to the main unit.

Such a unit is installed in the car's interior and in the immediate vicinity of the driver.

The main unit is engaged in processing the information received from the wheel sensor according to the parameters set by the driver himself.

The summary information is shown on the display. If there is a deviation from the specified parameters, the TPMS system immediately gives an alarm signaling the need to take action.

TPMS and metering principle

Indirect type of measurements.

Devices that measure pressure by an indirect type have a fairly simple algorithm of operation.

The principle is that a partially flat tire has a noticeably smaller diameter.

It turns out that such a wheel travels a shorter distance in one revolution.

The system compares with the reference values, also relying on the readings from the wheel rotation sensors ABS systems.

If the indicators do not match, the TPMS will immediately inform the driver with the corresponding indicator signal on the dashboard, and an audible warning will also follow.

The main advantage of wheel pressure sensors with indirect measurements is their simplicity and relatively low cost.

The disadvantages include the fact that they determine the pressure indicators only when the car is in motion.

Still similar systems have low measurement accuracy, and the error is about 30%.

Direct type of measurements.

Systems operating on the principle of direct tire pressure measurement consist of the following elements:

1. Pressure sensor;
2. Main control unit;
3. Antenna and display.

These systems measure the pressure in each wheel.

The sensor takes the place of the valve and measures the pressure, sending the reading through the transmitter to the main unit. Then everything is implemented similarly to the previous system.

The direct measurement system has a high accuracy of readings, is sensitive to any changes in the situation, and has the ability to reprogram after you change tires.

The information display of such devices can be installed on the central panel, it can look like a key fob, etc.

Wheel sensors in most of these systems have built-in batteries.

They cannot be replaced, so after the end of their service life, which is usually quite long, new sensors are purchased.

Major market players

The buyer is offered a huge selection among proposals in the field of tire pressure monitoring systems.

The following brands are worth highlighting: Tyredog, Orange, Whistler, AVE, Falcon, Autofun, TP Master, Phantom, Steelmate, Park Master and others.

This device works on the principle of direct measurement of tire pressure and temperature.

The product is distinguished by good accuracy and a well-realized display unit, which is installed on the central panel of the car.

We can note the high-quality signal level and the stability of the connection between the main unit and the sensors.

The Whistler ts-104 package includes:

• display unit;
• power adapter for cars;
• 4 sensors for each tire;
• Double-sided tape;
• rug on dashboard;
• spare waterproof seals;
• batteries;
• user manual.

Autofun TPMS-201a.

This model represents the budget product line of this manufacturer.

Perfect for those who appreciate the accuracy of measurements and the speed of the system's response, but the price remains quite affordable.

Autofun TPMS-201 has a neat and compact monochrome display with a small size and high functionality.

The entire list of information about the status of the car's tires is transmitted directly to the smartphone screen via Bluetooth.

To do this, you need to install a special application on Android and purchase a set consisting of 4 pressure sensors, a Bluetooth module and 4 batteries.

Summing up

Ease of use, undeniable advantages and reasonable price make the tire pressure and temperature monitoring system an indispensable assistant that tirelessly cares about your safety, will help to significantly extend the life of your tires and save you from unforeseen road complications during the operation of your car.

Tire Pressure Monitoring Systems TPMS include autonomous sensor and pressure and temperature , as well as an information block. The last element includes a screen on which the readings of the sensors are displayed. The driver can place it in a convenient place in the car.

TO How does the tire pressure monitoring system work?

The principle of operation of the device is simple. When the amount of air in the tires decreases, the circumference of the tire changes. As a result, the speed of rotation of the wheel increases. IndicatorTPMSmonitors these processes. If the indicator exceeds the set rate, a signal is given to the driver, who learns about the malfunction. Some modern systems send notifications to mobile devices with OS Android.

Severe tire damage can be easily identified on your own. With a gradual descent of the wheel, everything is much more complicated, since such changes are practically not felt. It is especially difficult to feel the difference when driving on the road surface. low quality.

Why install the system TPMS

Many car manufacturers install sensors by default in new cars. If the manufacturer has not done so, drivers have to purchase these valuable devices additionally. Thanks to themyou can get such benefits:

• Driving safety. At different pressure in tires, the car loses control stability and does not always obey the driver. This increases the risk of an accident. The danger increases especially when driving at higher speeds.
• Saving.Various parameters affect fuel consumption. Even e If the engine is very economical, overruns may occur. The reason is an increase in the contact area with the road surface. DwiThe gatherer is forced to function more intensely and to pull more weight.
• Environmental friendliness.Increased consumption vehicle fuel leads to an increase in the amount exhaust gases... Many car manufacturers try to make their products as environmentally friendly as possible.
• Service life of tires. With a decrease in pressure, the resource decreases work tires. Modern controllers promptly warn drivers about this.

Views pressure control systems

The whole variety of sensors can be divided into two types:

• External.Compact devices that replace the spool. They serve to block air in the chambers and record changes in pressure. Some patterns identify changes that are caused by natural fluctuations. The main disadvantage of this type of device is vulnerability. They can be stolen or accidentally damaged.
• Internal.The devices have increased reliability, they are protected from external influences. The devices are designed to be installed in a tire cavity, so it is simply impossible to steal them.Their only drawback is their higher cost.

AutoProfi store offers buy systems TPMSin a huge variety. Delivery is carried out throughout Russia.

Of course, many who read that note, most likely, thought - "It is my own fault!", But let's be consistent!

First, a $ 250 tire, no matter how you turn it, is a pity.

Secondly, the girl-owner "got on" the all-wheel drive bus after the front-wheel drive Civic, and outside the window there is snow and a little ice, plus traffic jams - she has not even had time to learn to "feel" the car ...

In general, let's be honest, in these conditions very few people can be insured against loss of control over the condition of the wheels. Therefore, since Friday evening, we wondered if there is some kind of (preferably, of course, very inexpensive) device on the spare parts market that would allow without a regular run around the car with a pressure gauge, monitor tire pressure.

It turned out that there is a choice, and it is huge! In fact, it only depends on the size of the client's wallet. Therefore, before telling you what we did find, let's mention what you need to monitor the pressure in the wheels so that the picture becomes more complete.

So, the normal pressure in the wheels (it is different for each car, and in Honda, as a rule, this data is written on the opening of the driver's or passenger's doors) is necessary for the following:

1. Safety of rubber (this is obvious, and there is no doubt)
2. Suspension safety (poorly inflated wheel in case bad road damages itself, too much inflated - transfers a strong shock to the suspension, damaging the struts and silent blocks)
3. Fuel safety (the lower the tire pressure, the greater the fuel consumption)
4. Reliability of driving (a car with differently inflated wheels on the road behaves unstable).

We hope we have convinced you that it is necessary to periodically monitor the pressure in the wheels. Why can well-inflated wheels lose pressure? With a puncture, everything is clear, but if there is no puncture? It is no secret that air leakage from a tire can also occur with the integrity of the rubber, and there are many reasons for this.

For example, sometimes the air finds a small outlet between the rubber and the disc, if the latter is not new.

Sometimes it can be so-called. slow puncture, when the hole in the tire is so small that the pressure drops very slowly.

There is also a sudden disassembly of the wheel, when the rubber is separated from the disc for a short time and the pressure drops instantly. This happens with sharp maneuvers, or when moving "sideways".

V winter time Wheels inflated in the heat in the cold lose their "points" due to the compression of the air inside.

Pumping cold wheels in frost, on the contrary, can lead to unnecessary high pressure... When the wheel starts to move and the wheel warms up, the heated air expands significantly, which can lead to squeezing out the air through the joints with the disc.

In general, there can be many reasons for surges in tire pressure, and it's finally time to talk about devices that help monitor them.

You should start with the classics.

Pressure gauge

A pressure gauge is a device for measuring the pressure inside something. A car tire pressure gauge measures the tire pressure. It is extremely simple to use it - just unscrew the protective cap from the wheel nipple, press the pressure gauge firmly against the nipple with the hole, and after the characteristic sound "PSHSHIK" look at the result reflected on the scoreboard.

Advantages of a pressure gauge:

1. Total control by the driver over the measurement operation. If you don't believe anyone, this is the perfect way for you.
2. The relative cheapness of the device. It should be noted right away that a good pressure gauge does not cost 100 or 200 rubles. The price for high-quality devices starts from 500 rubles, but they allow you to get reliable results.
3. High accuracy of readings. A good instrument will show a difference of up to 0.1 units.

Disadvantages of a pressure gauge:

1. The need for regular data cross-checking. If two days ago everything was fine, today it is no longer a fact.
2. Regular squats around the car in the summer, as a rule, are not a problem for anyone, but in winter, in tight clothes, this is simply uncomfortable.
3. Twisting the protective cap of the nipple does not cause negative associations only in sunny summer weather, when this cap is clean and warm. During cold or wet seasons, this operation rarely evokes pleasant emotions.
4. Checking all four wheels with a pressure gauge takes time, which is often a shame to waste.
5. In the event of a puncture while driving (as in the case with which this article began writing), the pressure gauge is absolutely useless.

Summary.

The pressure gauge is like a foot pump for pumping up the wheels, a seemingly useful thing that is still sold in stores, but only fans buy it. Nowadays, most simple electric compressors are cheaper than a good foot pump. The same can be said for the pressure gauge. No autonomy. There are other, more convenient ways to check, but there will always be people who will buy just a good old good manometer, on the basis of the principle "no one can check better than me."

Pressure indicator caps

Indicator caps are miniature gauges for each wheel. In order to become their happy owner, you need to purchase a kit that is designed specifically for your car, according to the plate attached to the door opening. If your car needs a constant pressure of 2.2 atmospheres, then take a kit that says "2.2", if 2 atmospheres, it means "2" and so on. Then, you screw these caps in place of the standard caps, and you get the desired result.

The principle of operation is extremely simple. Inside the cap, under its transparent part, there is a plastic device resembling a telescopic antenna. As long as the pressure in the wheel is normal, you can see a green cap under the clear plastic. As soon as the pressure has decreased, the green part drops below, and the orange (or yellow) segment of the "antenna" becomes visible. If things are completely "sad", the green part goes completely into the body and the red segment becomes visible.

Now that the principle of operation is clear, let's look at the advantages and disadvantages of such control.

Advantages:

1. There is no need to regularly check the pressure with a pressure gauge. Everything is visible at once, and quite clearly.
2. Low cost of the device. Cheap Chinese options start at $ 8 for 4 in the markets. Expensive versions, made in the USA are found on the Internet for $ 18 per kit. That is, it is quite comparable in price with a good pressure gauge!
3. Cute appearance drawing attention to the car.
4. Convenience of year-round access to data, regardless of weather conditions.
5. Instantaneous data acquisition during inspection. Unlike a pressure gauge, with which you need to sit down near each wheel, with these caps a quick glance is enough to control the situation.

Disadvantages:

1. Very relative accuracy of the device. Moreover, the more "Chinese" device we have, the greater this relativity.
2. Incomprehensible situation with overpressure. In theory, in this scheme, excess pressure is not reflected in any way.
3. An attractive appearance can attract more than just kind people. The anti-vandal resistance of such caps is minimal, so you should mentally prepare yourself for the fact that envious people will regularly screw them together.
4. The uselessness of the device when punctured when the car is on the move. If the wheel dramatically lowered, or lowered slightly throughout the day, and all this time they did not pay attention to it and continued to move, the situation will be similar to the problem stated at the beginning of the article.

Summary. Caps with color indication of tire pressure are convenient, inexpensive, attractive, but extremely vandal-resistant option. If the car spends the night on the street, it is somewhat naive to count on their long presence on your car - bright caps will attract the attention of even those who do not need them. The accuracy of their measurements also leaves much to be desired. But in general, there are more positive moments.

TPMS) with external sensors.

This is already a serious system. Unlike the previous, mechanical, electronic system allows you to see not only the tire pressure level, but also the temperature. This is a very important and useful indicator. The principle of operation is simple - the sensors are installed instead of the nipple cap, and read the necessary information, transmitting it to the head unit, which can be made in the form of a key fob or a screen inside the car. The advantage of the system is the direct control of each wheel, without the need for visual inspection. In addition, such a system is able to notify about a drop in tire pressure online, that is, while driving.

Advantages:

1. Measurement accuracy up to 0.1 atm.
2. Display of the temperature inside the tire.
3. The form factor in the form of caps on the nipples allows the sensors to be rearranged from summer wheels to winter ones, and vice versa.
4. Condition monitoring in real time with information transfer to a key fob or to a special monitor in the cabin.
5. Possibility sound signal, when pressure drops in the wheel with indication of a damaged wheel.

Disadvantages:

1. Price. The cost of such devices starts from $ 200 and more.
2. Low anti-vandal resistance. By analogy with the previous caps, these, despite their less attractive appearance, are also poorly protected from envious people and just hooligans, but the cost of one sensor is several times more expensive than a set of multi-colored caps from the previous description.
3. Low resistance to environmental aggression. Uncommon, but such electronic caps suffer from falling stones.
4. High cost of a new sensor.

In summary, it is an almost ideal device for operation in civilized areas, or for storage in guarded parking lots. When the car is outside the protected area, the chance of losing sensors due to banal theft increases significantly. The cost of one sensor is about $ 40-50.

Otherwise, it is an extremely useful and necessary thing, especially for drivers of cars with large tires. Saving the life of one tire can pay off the cost of this device. Of the small features of operation, which we did not attribute to disadvantages, is the need to monitor the employees of tire shops during work, so that they do not accidentally install the wrong cap.

Electronic system of indication of pressure and temperature in tires (TPMS) with internal sensors.

Unlike the system with external sensors, the sensors of this scheme are located inside the wheel and are mounted in the nipple area. In fact, the nipple is part of the sensor. This approach, on the one hand, binds the sensor to the wheel more rigidly, on the other hand, the sensors themselves are protected from almost everything.

Since this system is considered to be more vehicle-specific, the technical implementation allows for the installation of multiple devices linked to a single monitor. The best option on the market in terms of functionality.

Advantages:

1. High measurement accuracy (up to 0.1 atm).
2. Displaying not only the pressure, but also the temperature of the air in the tires. Additional benefits are the same as in the previous version.
3. Real-time monitoring
4. Highest anti-vandal resistance. From the outside, the nipple looks like a regular nipple.
5. Indication of the state of the wheel at "slow puncture".
6. Sound signal when pressure drops in the wheel with indication of a damaged wheel.
7. A wide range of additional services on one device. Execution in the form of a whole combine of devices is possible, with a rear-view camera, with parking sensors and air pressure and temperature sensors in the wheels with output to the monitor included in the kit. At the same time, it is possible to install only a tire pressure and temperature monitoring system.
8. Long battery life of the sensor. The operating time of the sensor from one battery is up to eight years.
9. Inertial activation of the sensor. There are models that have a power saving function that turn off the sensors for standing car and automatically turn them on when you start driving or when the pressure in the wheel changes.
10. The ability to control five (!) Wheels simultaneously, including the spare.
11. Possibility to change control parameters of pressure and temperature. For example, you like to ride on softer or harder wheels than the manufacturer recommends. In this case, you can adjust the pressure level required for monitoring by the system yourself.

Disadvantages:

1. High price. The cost of this high-quality system starts at $ 250.
2. In the case of using two sets of wheels (winter and summer) on disks, you need to buy two sets of devices. Installation is carried out when mounting tires on a disk.
3. The need to remind the tire service employees of the extra attention when working with the wheel on which the internal sensor is installed, in order to avoid damaging it with the installation tool.

In terms of functionality, this option is the most attractive of all on the market. The only controversial point is the price of the device. Give almost $ 300 if you are leisurely driving around the city, if your car does not have big wheels, or your earnings do not depend on the condition of your car - this is probably superfluous.

However, if you often drive long distances, or if your car uses large wheels, or you make money on your car, or if you are just anxious about the reliability and stability of driving your car, this option, in our opinion, is the best. ...

The range of devices presented in this group is very wide. The most interesting, simple and understandable system seemed to us, the monitor of which is included in the cigarette lighter, and displays the status of the wheels online. When leaving the car, if she "spends the night" in an unguarded parking lot, this monitor can be taken with you, and the wheel sensors will look like ordinary nipples. Thus, the first rule of the safety of the car is observed - it does not attract the attention of an intruder in any way. This solution seems to us the most practical.

For those who decided not to waste time on trifles, there are systems that combine not only a system for monitoring the temperature and air pressure in tires, but also navigation (!), A rear-view camera (!) And parking radars (!) With output to included monitor. Unfortunately, the market position of this harvester solution is somewhat shaky. On the one hand, the system does not in any way claim to be "budgetary", on the other, - in expensive cars, a similar system is already preinstalled by the manufacturer. You can talk as long as you like about the advantages of the latter solution (for example, the ability to set the level of pressure and temperature control on your own is impossible in the system pre-installed by the automaker, and in a third-party system, without problems), but for some reason it seems to us that few people will dare to "pull out" the same Acura "native" system, in order to put in its place, albeit a good one, but someone else's. If we're wrong, tell us the opposite!

General conclusions.

We hope we managed to finally convince everyone that to monitor the pressure in the wheels necessary... In this article, we've looked at four main ways to "spy". The first two will save you from only the pressure difference, but will in no way help to identify the problem at the initial stage. Often, it starts with hitting a small stud, which gives a small hole, causing air to escape gradually, but when driving long distances, such a puncture can become "lethal" for the tire. Chewed by a wheel rim, it loses its structure, and even if the nail is removed and the hole is repaired, it cannot be completely restored. On wheels of a small size (13-15 inches), it is insulting, but not very expensive $ 70-100 for damaged wheel... However, at a wheel cost of $ 200 and more, this already becomes really painful for the wallet.

The second two devices in this review are called to warn about the problem at the very beginning of its appearance.

The advantages of replaceable caps are obvious, but we do not know of a single unguarded place in Russia where it would be possible to guarantee their safety. Unfortunately, they are much more likely to be curled up than 50%. At the same time, the person who twists them will most often do this not for profit, but rather simply out of hooligan motives, or out of a sense of "civil protest", as it is now fashionable to say. In these conditions, the most attractive are systems with "closed" sensors.

Another useful feature of systems that are able to "monitor" not only pressure but also air temperature is their indirect ability to diagnose a condition wheel bearings and braking systems wheels. This "undocumented" function consists in the following, - in case of critical wear of the bearing, or wedging of the brakes, intense heating occurs wheel rim, due to the heating of the most problematic node. Often, the driver does not know about the problem until the last moment, which can lead to serious damage. Temperature sensors located in the wheels, catch the problem, indicating more high fever air in the wheel located on the problem unit than on other wheels.

In short, the last two types of devices in the review are classified as “must haves” for those who are not indifferent to the condition of their own car.

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Tire pressure sensors have long ceased to be a fashionable device. For modern driver this is de facto a must-have, especially when operating a car in winter. Confirmation of this is the trend standard installation similar control systems on all imported vehicles of the middle and premium class.

In a new expensive car, an air pressure check sensor is already present or is optionally installed. Owners of domestic "horses" or budget models can take care of the availability of a useful gadget on their own. Modern market automotive electronics offers a lot of universal solutions, including a radio frequency electronic intelligent autonomous system (Tire Pressure Monitoring Sistem, or TPMS for short). Wheel pressure controllers are in the highest demand.

What does TPMS give to the driver?

1. The ability to quickly respond to a puncture.
2. Save fuel by maintaining an effective pressure level.
3. Peace of mind for not checking the wheels before driving (when starting the engine, the controllers will automatically detect qualitatively significant minimum air pressure losses in the tires).

Classes, types and types of sensors

The catalog of available universal tire pressure testing systems is quite extensive. They are divided according to two main characteristics. The first is the installation method.

1. External TPMS, aka Direct System. The controllers resemble conventional "caps" that screw on the nipple in 10 seconds. Their big plus is ease of installation and low weight (9.6–10 g). The first makes it possible to use the system without breaking / flanging tires. Second, there is no need for wheel balancing.

1. Embedded devices (Indirect). Such a device is mounted only with a bevelling and flanging, since the controller is attached to the rim of the rim with the help of special clamps. They weigh more than external controllers, therefore, after installation, an additional action will be required - balancing.

According to the completeness of the displayed information, the systems are divided into high and low class. In the second case, only an alarm is displayed on the monitor (or the display of a smartphone / tablet), and the source of the problem is not indicated. In addition to danger signals, high-end models are also able to show the level of air pressure and a damaged wheel, which greatly simplifies the driver's actions.

Developers of these technologies separately offer TPMS for trucks, motorcycles, passenger cars... There are also universal options (which are suitable for all cars) and individual ones for a given car model.

How the tire pressure sensor works

The principle of operation of an electronic tire pressure sensor is the same for all electronic devices. Its essence:

• the controller attached to the wheel collects information about its condition (temperature, pressure);
• the transmission of the collected data from the sensors to the transceiver is carried out via a radio channel (bluetooth), with a diagnostic frequency of no more than 2-3 seconds;
• when the indicators exceed the upper bar of the standard values ​​or fall below the set level, the program gives a signal. The latter can be light or sound. The pressure limits can be set independently within the range specified by the device manufacturer (usually 1.7–3.2 bar).

Some TPMS via Bluetooth also display information on a smartphone.

TPMS monitoring system power

The device is powered by rechargeable batteries... Moreover, each sensor has an individual battery. The controller can operate both on batteries and on solar panels and an on-board network, it all depends on the model. The monitoring system powered by solar panels, in contrast to systems connected to the on-board network, is very convenient, since almost all devices are powered by a cigarette lighter. This means there are no unnecessary, dangling wires, and the cigarette lighter socket is always free.

Sensor batteries indoor installation have a long service life. It usually ranges from one to three years. After that, the wheels are again disassembled and produced full replacement sensors.

All types of external controllers have a G sensor, which puts their power system into "sleep mode" during standstill. This allows for a longer battery life. Now almost all electronic sensors are equipped with sensors of limited power consumption, even if they are internal or external.

How to connect sensors

A branded TPMS kit usually consists of:

• From controllers with signatures for each wheel (the number depends on the class of car, usually there are four caps in the set for light transport and six if it is a truck tire pressure monitoring system). A signature of two Latin letters, where the first one defines the horizontal position, the second one vertically. Example: LF - left (left) front (front).
• Instructions.
• Transceiver with 1-5 buttons on the sides to indicate pressure ratings. On the back side of the receiver mounting there is double-sided tape for easy installation. This device is held securely, you can safely mount it on glass, panels.
• A set of keys for disassembling the controllers or the receiver.
• Connection adapter (provided in wired accessories).
• Spare parts (stickers, gaskets).

The installation method depends on the type of device. External controllers can be installed on your own by simply replacing the "native" air tube caps on the wheels. Here it is worth paying attention to the metal of the controller thread. It can be aluminum or brass. It is important that it matches the nipple's own thread to avoid oxidation.

The internal TPMS is installed at the tire service areas. This procedure is short-lived and hassle-free, but it will protect an expensive tire pressure monitoring system from banal theft.

How to register sensors

After technical works after fixing the elements, you can proceed to setting the parameters. The user can set the limits of the tire pressure level for monitoring. For this, special buttons are provided on the side of the receiver. Since they are needed exclusively for customization, the number of their manufacturers is trying to minimize.

The modern market knows cases when the receiver can do with just one button. To register data, it must be pressed the required number of times. Example:

• press and hold for 1–3 seconds (long) - on / off;
• five short clicks - start setting up the TPMS system;
• to set the lower limit, you can use the menu buttons (on the side, usually labeled with up / down arrows) or, again, click once on the main button;
• fix the standard - press and hold.

Together with the prescribed pressure standards, you can set the method of its measurement (bars, Kilopascals, psi), temperature units (Celsius or Fahrenheit). In the instructions, the manufacturer explains in detail the procedure for setting up his receiver, the driver should not have any problems with this.

Sensor selection

The TPMS systems market consists of dozens of models of no-name manufacturers (all in the overwhelming case from China) and 3-5 reputable brands. From optimal options In terms of price / lifespan ratio, drivers noted the Japanese Carax tire pressure monitoring systems, better known among motorists as different versions of the CRX. Parkmaster devices performed well.

When choosing a specific device, you should pay attention to:

• on the range (the range of signal transmission, for "Karax" it starts from 8-10 meters);
• connection method;
• options (data transfer to smartphones / tablet, settings);
• warranty period of service;
• the range of pressure limits that can be prescribed.

The method of displaying / outputting information is of great importance. More convenient than a high-end system (on the screen of the TPMS monitoring system, all wheels are constantly displayed with an indication of pressure and temperature).

In this review, I will tell you what this thing is. TPMS (Tire Pressure Monitoring System)- the system for monitoring the pressure and temperature in the tires of the car and what prompted me to purchase such a system that, at first glance, not particularly necessary and rather expensive. Who cares I ask under cut.

Every driver knows that the correct tire pressure is very important. At low pressure, fuel consumption increases, handling deteriorates, and tire life decreases. Excessive pressure can lead to increased tire wear and early failure. You can read more about the dangers when driving with a tire pressure different from the nominal one, for example, you can.
Walking and measuring the pressure in the wheels over time becomes a routine exercise, the intervals between measurements are noticeably lengthened and vigilance ultimately falls asleep completely. This is how it happened with me.
One fine morning our whole family decided to go shopping. It just so happened that I did not inspect the car as usual - we just sat down and drove off. In the process of driving, I did not notice anything ordinary, except that on one of the trapped fossa a suspicion crept in that something was wrong, but this was already at the very end of the path. When we stopped in the parking lot, I saw with horror that we were driving on a fully deflated front wheel... Fortunately, we didn’t drive so much on it - about 3 km. This is what happened to the tire.


There would be more distance and the tire would have to be thrown out, but since I could hardly find one of the same tires, I would have to change at once 2. This is a significant expense. It was then that I wondered if there was a system that measures pressure in real time. As it turned out, such systems exist.
There are TPMS systems with sensors that are installed directly inside the tire (you need to disassemble the wheel) and there is a system with sensors that are simply screwed onto the wheel nipple instead of a cap. I chose for myself the option with external sensors.
The sites found many different systems pressure control. Of all the proposals in I chose the TPMS system, which will be discussed further.

Confirmation of an order

Specifications

TPMS FEATURES
Sensor type: T8 wireless pressure and temperature control sensors.
Displayed parameters: Pressure and temperature from 4 sensors simultaneously.
Low Pressure Alarm Threshold Setting: Yes
Possibility of setting the alarm threshold high level pressure: Yes
Display type: digital LCD
Pressure unit: kPA / bar / psi
Temperature units: ºF / ºC
Sensor battery low alarm: Yes
Battery type: CR1632
Sensor battery capacity: 140mAh 3V
Operating voltage of sensors: 2.1 - 3.6 V
Transmitter power in sensors: less than 10 dBm
Receiver sensitivity: - 105dBm
System frequency: 433.92 MHz
Working temperature: -20 - 85 degrees Celsius.
Sensor weight: 10g.
Receiver weight: 59g.

Box and equipment

TPMS system came to big box, unfortunately already torn by someone and carelessly sealed with scotch tape. The photo shows.


There is a sticker on the side of the box indicating the type of sensors and their identifiers. As you can see, the sensors here are of the T8 type.




The complete set is as follows: 4 wireless pressure sensors, each sensor has a sticker on which wheel to put it on, 4 nuts, 3 spare gaskets in the sensors, keys for disassembling and installing sensors 2 pcs., A power adapter for the cigarette lighter, a receiver and display unit, instructions.

A little about the instructions

Looking ahead, I will say that I connected the TPMS system on the table from external source power supply, and of course the system did not see a single sensor. Then I decided to get acquainted with the instructions, but it turned out to be completely on English language... I do not speak English and turned to the Google translator for help. This is what we did, please do not scold too much.
Link to document translation of instructions.
After the translation, everything became clear, I wasted my time. It is difficult to understand the instructions at the intuitional level without translation.

I have an alarm set to a pressure of 1.8 bar. It got colder in the morning and the pressure in the right front wheel dropped below 1.8. So at the same time, the display unit beeps pretty disgustingly and blinks with emergency indicators. Was forced to urgently stop and pump up the wheel.

At night, the indicator does not glow brightly, does not distract. When turned on, the readings on the indicator do not appear immediately. Within a minute, as a rule, all 4 wheels are displayed. Further, the readings are periodically updated.

In conclusion, I want to say that I am very pleased with the purchase. I don’t think I wasted my money. The readings are displayed very accurately. All parameters for all 4 wheels are displayed at once, you do not have to switch anything. Everything is very conveniently grouped and a short glance is enough to understand the condition of the wheels. Now you don't have to walk around the car looking at the wheels, just look at the indicator on the left side.
The system forces the wheels to pump up even when it is not critical. With the purchase of sensors, it became a little quieter to operate the car. Of course, this system has its drawbacks. This is the lack of instructions in Russian, the possibility that the sensors can simply be twisted by curious people, the cost.
Of the advantages, I note the accuracy of the readings, I liked the design of both the sensors and the indicator unit, the ease of installation and operation, the ability to install the receiving unit where I like and connect it to the ignition switch without adapters and converters. I recommend buying, but then decide for yourself whether you need such a system or not.