A rain sensor windshield is operated by an optical sensor that monitors light reflected from part of the windshield. The sensor turns on the wipers as necessary, according to JD Power.
The optical sensor projects infrared light at the windshield and detects how much light reflects back. If rain or dirt decreases the reflection, the wipers start working at an appropriate speed and frequency if the driver has activated the sensing system in advance.
Rain-sensing windshield systems are a safety feature that helps reduce driver distractions, making it unnecessary to monitor the windshield wipers continually. This function can help prevent accidents. Such systems may come as a standard feature or option. They are also available for aftermarket purchase.
A rain-sensing system does not clean the windshield better than manual activation. The optical sensor just makes it unnecessary for a driver to keep turning the wipers on and off manually.
