February 21

What Is A Rain Sensor?

Not too long ago, the only settings on a windscreen wiper were off, low, and high. The intermittent wiper option then enabled the driver to move the wiper mainly based on how much rain was falling.

A couple of improvements have made it to the automotive industry in recent years, one of which is the rain-sensing wipers.

What is Rain Sensing Technology?

A rain sensor sits on the windscreen glass and will trigger the wipers when it detects rain on the windscreen. The technology comes across as magic because the sensor is hidden and turns on automatically. Thanks to these sensors, drivers don’t need to switch between all three or four windscreen wiper modes.

How Do Rain Sensing Wipers Work?

In a nutshell, windscreen wipes work by measuring the number of water droplets on the windscreen. This will allow them to activate the wipers to remove water. The sensor works by sending an invisible infrared light across the windscreen. The light detects water on the glass and sends that signal to the internal computer.

The sensor knows how much water is on the glass, which triggers when the wipers need to be activated. The rain sensor will raise the wipers’ speed when it’s pouring to ensure sufficient wiping to clear the windscreen.

Importance of Having Rain Sensors

Many people may assume that rain sensors aren’t that important, but they happen to be a critical safety component for drivers today. One of the reasons it is essential is that it eliminates distractions, allowing the driver to see the road more clearly and focus on driving. The sensors ensure that you also have one less thing to worry about.

The other significant advantage is that sensors can respond sooner than a human being, often being able to clear the windscreen even before the driver can think of it. However, rain isn’t the only scenario; the sensors will also turn on the windscreen wipers if water splashes onto your windscreen by oncoming traffic going through a puddle.

What Happens to Rain Sensors When Replacing Your Windscreen?

If your windscreen needs to be replaced, you need to start by checking if the model you own has rain-sensing wipers. Many people may not realize that their vehicle has them since they still turn on the wipers manually.

If your vehicle has rain-sensing technology, you have the option of replacing the windscreen with or without it. As you’d assume, windscreens without this technology are cheaper, but you will lose this feature.


Sure, rain sensors will make driving a vehicle more comfortable and safer, but issues can arise. Also, these are prone to malfunction or failure.

However, if you need to get your windscreen changed and are unsure how best to proceed, get in touch with DC Auto Glass in Perth, Western Australia. We can provide you with a quote for replacing a damaged windscreen with a rain sensor and without it, depending on the make and model of your vehicle.