In other words, an instrument cluster consists of a speedometer showing speed and, most often, a tachometer showing the number of engine revolutions.
In the simplest terms, we will be talking about the device used to measure a given vehicle’s speed.
It is responsible for converting mechanical revolutions into electric impulses thanks to which the instrument cluster’s needle can indicate a specific speed of a vehicle. In the case of older cars, we talk about a special, flexible, rotating wire which is connected to the speedometer. Not every speedometer is accurate, and we can even find ourselves in a situation where it is calibrated in such a manner to show higher speed than the actual speed – all this so that drivers do not exceed the permitted speed. We can also find a speedometer to lack measurement accuracy when there is a difference in wheel diameter resulting from a difference in pressure. Of course, there are electronic speedometers as well, where the main element is a revolution sensor. Such a speedometer provides an electric impulse at the end of each full revolution and the computer’s role is to convert the interval between the impulses into a specific result in the form of concrete numbers. There are many different types of speedometers on the market. Furthermore, one can find those that are dedicated to specific car models. Speedometers are something obvious, something found in every car, but probably none of us thinks about how they work. At a certain point, the a speedometer may stop working properly, and, of course, one has to equip a car with a new one in such a situation, since it is a really important part of a vehicle and its correct operation is something of great importance.