Tyre pressure monitoring systems come in two variants and each has their own slightly differentiated features of characteristics. It would depend on the use and the purpose of use as to which an average car owner would choose in keeping track of tyre pressure levels. Let us look at both variants and make some comparison on features and characteristics.
Indirect Tyre Pressure Monitoring systems
These systems do not use actual sensors to indicate pressure but employ the use of such things like measuring changes in tyre rotational speeds as common logic would tell you that tyres which are under-inflated are less wide in diameter. Wheel speed sensors of ABS systems could pick up on a variation in speed. More recent forms of indirect TPMS systems which are considered “second-generation” and use a form of spectrum analysis which incorporates a special type of software using signals to monitor the oscillations in wheel rotation. ITPMS systems cannot present the absolute value of tyre pressure but would give an approximate amount and have to manually reset after you check all your tyres. The reset is done through a button on the dashboard. These systems are more sensitive to factors like type of road surfaces and speed of driving. Furthermore, they do not come with any additional parts and are quite easy to use, with no external environmental effects.
Direct Tyre Pressure Monitoring systems
These systems use tyre pressure monitors which directly measure the level of pressure in each tyre and relay it to the driver. They can do this internally and externally and are powered either by battery or by the use of electromagnetic induction which would be the more long-lasting option. Externally mounting these systems could damage the unit due to various reasons such as accidents excessive exposure to the elements. A major benefit of this pressure monitoring system is that it gives you data in real time leaving no room for a shortage foyer pressure goes unnoticed. They are also adaptable in their compatibility being used for motorbikes and smaller vehicles and are very useful in heavy vehicles in commercial transportation as these systems can measure multiple sets of wheels. It is highly recommended that direct TPMS systems are used in high-grade tyres as rough roads would naturally wear down tyres and in turn wear down these devices as well.
Mandatory in some parts of the world
TPMS installation in vehicles has been made mandatory in the EU, effective from the year 2014 as governments around the world see it as a major safety precaution in reducing in road accidents as a result of under-inflated tyres. In the US, from the year 2007 the “Tread act” deemed it mandatory for all light motor vehicles to have these devices so naturally, the demand for TPMS systems increased quite dramatically. These legal mandates have cemented the importance of these systems present in vehicles and are seen as highly beneficial in taking vehicle safety to the next level. It would also be beneficial for the user themselves, thus being a win-win situation.