What is the difference between built-in and external tire pressure monitoring?
2 Answers
Tire pressure monitoring built-in vs. external differences: 1. Price: Built-in types are relatively more expensive than external types. 2. Installation method and time required: Installing built-in tire pressure monitoring takes more time and requires professional tire removal; external installation is relatively simpler. Tire pressure monitoring is generally divided into the following two types: 1. Direct tire pressure monitoring: Uses pressure sensors installed in each tire to directly measure tire pressure, and wireless transmitters to send pressure information from inside the tire to a central receiver module, which then displays the tire pressure data. When tire pressure is too low or there is a leak, the system automatically alerts. 2. Indirect tire pressure monitoring: When the pressure of a tire decreases, the vehicle's weight causes the rolling radius of that wheel to become smaller, making its rotation speed faster than other wheels.
I've driven quite a few cars. The built-in tire pressure monitoring sensors are hidden at the tire valve stem inside the tire, transmitting data to the dashboard display via wireless signals. The measurements are very accurate, unaffected by wind, rain, or bumpy roads, and they're durable but a hassle to install—you need to remove the tire and visit a professional shop. Changing the battery is also troublesome, costing at least a few hundred bucks. The external ones are straightforward: just screw the sensor onto the valve stem, and you can do it yourself in minutes. They're much cheaper, costing around a hundred yuan, but they're prone to falling off or getting stolen. The main differences lie in accuracy and durability. For long-distance trips or frequent off-roading, built-in sensors are absolutely worry-free and won't give false alarms about leaks. For city commuting, external ones are more convenient, but don't rely on them too much. From a tire maintenance perspective, built-in sensors help maintain even tire pressure, which can extend tire life.
