It is better to buy an external tire pressure monitor, or a built in one

1. The principle of the external sensor is to use the thimble to open the valve core, and the air pressure impulse of the sensor is the internal air pressure of the tire, and the sensor cleverly uses the thread of the fixed dust cap to fix it on the valve. In fact, our R&D department has already done pressure tests on all ordinary valves on the market, and the pressure is far greater than the tire pressure rush.

2. The air pressure measured by the external sensor is accurate, but some people suspect that the measured temperature is the temperature outside the tire, not the air temperature inside the tire? [Rebuttal] The temperature parameter is really not as precise as it is built-in. But 90% is correct (generally a difference of 5-8 degrees).

Although the single area of the valve in contact with the internal air pressure is small, the convection speed of the gas is very fast because the tire is in high velocity.

3. Although the external sensor has to be removed every time it is pumped, it must be installed after the gas, and after it is installed, it must be smeared on the joint of the sensor and the air valve with soapy water to see if there is air leakage. However, the frequency of refueling of our cars is still very low, and the installation speed is also fast, it depends on your choice.

4. Regarding the problem of the external sensor picking the air valve, if the valve has a missing angle or wear, it will leak when installed. Although it is very cheap to replace an air valve, it is still recommended that you install it directly; Although the probability is small, it is still necessary to warn everyone.

5. After the external sensor is installed, if the tire is easy to break? 【Identity】After that, avoid passing through protrusions, so as not to be scraped and cause air leakage.

6. After the external sensor is installed, it is equivalent to installing an object of about 10 grams at the end of the valve, and the rubber aging at the rear of the valve will be accelerated with the rotation of the tire at high speed? 【Rebuttal】The life of the tire should not be as long as the sensor, and the tire will be replaced before he ages.

7. Regarding the anti-theft of external sensors, although there are few people who steal, the disassembly tool of the same brand is the same, and all the external sensors of this brand can be removed with this tool. 【Rebuttal】For those who purchase wrenches separately, we must purchase them with the order number.

8. Be sure to carry the disassembly tool with the car, otherwise the sensor cannot be removed if you encounter tire problems, and if you want to deal with the tire, you can't release it, and if you repair the tire, you can't pump it. [Agree].

9. It is easy to attract people to deliberately destroy (for example, children, seeing a large piece of the gas nozzle, curious may come to ...... and wait.)Rebuttal] The external sensor is made of metal blocks and high-strength plastic through die-casting and then assembled, which has a strong fit. It won't break so easily, causing the valve to leak.

10. The external sensor uses the coin cell battery CR1632 (Wansheng or Panasonic), which is easy to buy for ordinary car owners, to resist low temperature difference? This kind of battery is easy to replace, which greatly prolongs the service life of the sensor, and the low temperature resistance is not bad, even if the northern temperature is -40 degrees in winter, the failure rate of the sensor is very small. At least we haven't received any feedback like that so far.

But friends in the Northeast still recommend buying the built-in one.

The external installation and replacement of the battery is convenient, the built-in is not easy to damage and anti-theft, but it is inconvenient to install and replace the battery, the built-in type of the department needs to do dynamic balancing, it is recommended to be external, I have been installed for three years, and the tire pressure monitoring is very accurate and convenient.

Hello, for the tire pressure monitoring system, it is definitely necessary to choose the built-in one, the effect will be better, if it is external, the sensor is relatively easy to break, and it is easy to fall off, so you use the built-in.

Summary. 1. Compared with the built-in tire pressure monitoring and the external one**, the built-in tire pressure monitoring is more expensive than the external one. 2. In terms of operability, the built-in type should not only be installed in the repair shop, but also to do dynamic balancing, and it will take more man-hours to disassemble and replace, while the external type can be replaced by yourself, which is simple and fast.

The built-in type is more cumbersome to operate, but it has a lifespan of 5-8 years, which is much higher than the 1-2 year lifespan of the external type. The sensor needs to be removed first when the external type is inflated, while the built-in type has no effect.

1. Compared with the built-in tire pressure monitoring and the external one, the built-in tire pressure monitoring is more expensive than the external axle. 2. In terms of operability, the built-in type should not only go to the repair shop for installation, but also do dynamic balancing, and it will take more man-hours to disassemble and replace Minjing, while the external type can be replaced by yourself, which is simple and fast. The built-in type is more cumbersome to operate, but it has a lifespan of 5-8 years, which is much higher than the 1-2 year lifespan of the external type.

The sensor needs to be removed first when the external type is inflated, while the built-in type has no effect.

3. In terms of accuracy and stability, the error of external tire pressure monitoring products is slightly higher and simpler, and there will be a delay in response speed, but in the actual test, the accuracy and stability of the two cavity monitoring tend to be the same, and there are many new external tire pressure monitoring, whose performance and stability have made up for the original technical defects, and now only the old-fashioned external products have such drawbacks.

External and built-in tire pressure monitoring have their own advantages and disadvantages, the life of the built-in sensor is longer than that of the external sensor, and the external tire pressure monitoring system is easy to install, it only takes a few minutes to install, the built-in tire pressure monitoring system must be professional and with the help of various tools of the stool, the dynamic balance needs to be done, the process is complex, the installation time is long, and the installation cost is higher. The life of the built-in sensor is longer than that of the external sensor, but the battery of the built-in sensor is generally encapsulated in a plastic shell, so it cannot be replaced by itself, while the battery of the external sensor can be replaced by itself and can be used for a longer time. It should be mentioned that the battery life of the sensor is determined by the detection interval of the sensor, the abnormal situation of the tire and the driving time, so it is unscientific to say that the battery life of the sensor can be used for n years in general.

Many people have a misconception about the accuracy of tire pressure measurement, that is, the external measurement is not accurate. In this regard, although the internal sensor and the external sensor are installed in different positions, the accuracy of the tire pressure measurement will not be affected because the external sensor is directly mounted on the valve. In the measurement of tire temperature, the external sensor will have an error of 1 2 compared to the built-in one, but this will not affect what the tire is, which is almost negligible.

The external sensor is installed on the outside of the tire, so it has to experience the same external environment as the tire, while the built-in sensor only exposes the air valve, so the built-in use environment is better than the external tire pressure monitoring system.

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