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How Do Automatic Doors Work?

How Do Automatic Doors Work?

Automatic doors are the perfect way to make your business COVID-friendly. You can reduce the spread of the disease by removing contact on entry — customers can simply walk in and out of your premises without touching the doors.

It’s like magic.

Well, not quite magic. But automatic doors are an impressive piece of kit, combining advanced sensor technology with robust motor mechanisms. Ever wondered how automatic doors work? Read on to find out.

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Do automatic doors use sensors?

Automatic doors work by sensing when a person is attempting to enter the building. This is achieved in several ways, depending on the type of sensor used in the the door.

Some doors use only one type of sensor, whereas others use a combination of sensors. A combination of sensors might be used at all times, or the door might have a primary sensor and a secondary sensor, with the secondary sensor only coming into effect if the primary sensor goes down.

New Automatic Doors for a Shop Front

Here are some of the sensors most commonly found in automatic doors:

Motion sensors

Motion sensors are usually installed on the sides of the door and use a microwave beam to detect when something moves into the immediate vicinity. They work by measuring the reflection off a moving object.

Motion sensors are useful for providing seamless entry and exit. The doors will open as someone approaches, meaning they can enter the premises without breaking their stride.

However, one of the problems with motion sensors is that they may not detect someone who approaches the door very slowly. This is why radio wave-based motion sensors are often combined with infrared sensors.

Infrared sensors

Infrared sensors use passive infrared technology to detect sudden changes of temperature. Humans give off a heat signature that is detected by the sensors as they approach the door.

Pressure sensors

Pressure sensors are usually disguised as mats placed on either side of the door. The sensor detects weight — when you stand on the mat, the sensor detects that you have approached the door and wish to enter.

Do automatic doors use motor mechanisms?

Once the sensor has detected someone approaching, it will communicate with the gear motor. The gear motor will activate the rubber belts and pulleys that control the opening and closing motion of the doors. There are rollers on the bottom of the door, which help them to move smoothly.

What are the benefits of automatic doors?

In addition to helping to reduce the spread of germs (an especially important benefit during the current COVID-19 pandemic), automatic doors also help to regulate temperature inside the building by only opening when someone needs to enter or exit. This will prevent heat from escaping, helping you save money off your energy bills.

At Royal Industrial Doors, we provide made-to-measure automatic sliding doors to businesses in Stevenage, Luton, Milton Keynes plus other areas. We can provide a site survey of your premises completely free of charge, and our experts will deliver your door to the exact specifications of your entrance.

If you want to fight COVID-19 and reduce the spread of the virus on your premises, then upgrade to an automatic door. Contact our team today for more information.

Contact us, 01582 570 707 or send us an email to

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