"Car rain sensors are a fairly new addition to the comfort system of vehicles, offering the amazing mechanic of windscreen wipers operating automatically when water touches the windscreen. Although certainly not essential, car rain sensors offer a luxury that simply allows more of the drivers attention to be on the wet roads. Some new model vehicles come with a car rain sensor already installed, but it is also possible to manually fit one to a vehicle."
Although it is still possible to use windscreen wipers manually, when a car rain sensor is installed the system will kick in automatically when drops of water hit the windscreen. Upon even a few drops landing on the glass the wipers will kick in, and will stop again when the rain ceases. The system will also work if a puddle splashes onto the windscreen, meaning that the driver need not ever worry about being blinded by sudden bursts of water again. Keep in mind, however, that going through a car wash may require turning the sensor off.
Car rain sensors are not difficult to install, and should be no problem for a DIY mechanic, taking no more than just a few hours of time. Even an amateur mechanic should be capable of the task. However, the device itself is not cheap, so one should weigh the benefits of a car rain sensor against the costs. Keep in mind that some drivers consider the device to be essential in the rainy season, especially in bad driving conditions and on roads that are imperfect. If you live in a high-rainfall zone installing a car rain sensor may be exactly what the doctor ordered.