Automatic Door Sensor Types Explained for Commercial Use

Automatic doors are an essential feature in many commercial buildings. From retail stores and hospitals to office buildings and airports, these systems improve accessibility, traffic flow, and overall convenience. Any automatic door system is centred on a sensor that detects motion, presence, or pressure in order to open or close the door. Understanding the different automatic door sensor types can help facility managers and business owners choose the right solution for their space. In the current article, we are going to consider the fundamental principles of the work of such sensors and dwell on the most popular types of automatic door sensors that are implemented in the market.

Why Automatic Door Sensors Matter in Commercial Buildings

These doors would not run efficiently and safely without the automatic door sensors. The reason they are used is that without them, an automatic door will not know when someone is approaching, or a cart, a wheelchair, or a vehicle. They make the operator of the door aware of the presence of a person by sensors, which in turn activate the door.

Automatic sensors assist with easy access to people having limited mobility, help decrease feelings of touching the physical objects such as door handles, meet requirements of safety and accessibility rules and regulations, and become more energy efficient when the doors open as time-and sensor-controlled and close as fast as possible.

The commercial case still demands the selection of the appropriate sensor technology because of the heavy traffic within certain commercial settings, as well as the conditions in which the sensors must be used. Different designs of automatic door sensors are modified to respond to motion, temperature of the body, pressure or body presence.

Motion Sensors

Apart from pressure mats, motion sensors are the most common automatic door sensor type used in commercial buildings. This will be a sensor sensitive to someone moving toward it.

Motion sensors use either microwave or infrared technology. Microwave: The sensor generates microwave waves that reflect off moving objects. When the sensor detects a variation in the reflected waves, it opens the door. Infrared Motion sensors detect heat variations or body motion.

Over door sensors, these detectors work well in high-traffic areas like grocery stores, retail entrances, and hospitals. Usually installed at the top of a doorframe, they have a wide detection range that opens the door before you have even entered it.

But motion sensors can also activate the door when motion that is not desired is detected. For instance, pedestrian traffic outside the building or even moving objects outside, too close to the sensor, can activate the sensor if it is too sensitive.

Presence Sensors

Presence sensors are used to determine if a person or object is in the immediate doorway area at the present time. They differ from motion sensors in that they do not respond to the physical movement of the object in question.

Often, these sensors are installed as part of the safety function. If a person were to stand in the doorway or walk slowly through it, the presence sensor would ensure the door wouldn’t close until the entrance was clear.

Presence sensors commonly utilize either infrared or laser systems to sense the presence in close proximity to the door. Most modern automatic doors include both motion detection and presence sensing for activation and safety.

For safety reasons, presence sensors have become standard applications in hospitals, assisted living homes, and other institutions.

Infrared Sensors

Infrared technology dominates the automatic door sensor types. Infrared sensors are capable of sensing body heat or temperature differences in a designated space.

Infrared sensors for automatic doors come in two forms. Active infrared sensors transmit an infrared beam and observe the change in reflection as items of varying reflectivity pass through their infrared path. Passive infrared sensors detect heat rays emitted by people and animals.

They are appreciated for their precision and tendency to falsely trigger less. These sensors are better at differentiating human motion from other kinds.

Infrared Sensors are sometimes built into commercial buildings where a consistent performance is needed. Another reason for using an Infrared Sensor is that they can be used with other technologies to make the system safer and more precise than other technologies.

Pressure Sensors and Floor Mats

Pressure sensors operate differently from many other automatic door sensor types. The sensors detect physical weight which people apply to specific locations instead of detecting motion or heat.

The sensors commonly find their installation in floor mats, which are positioned in the entrance area. The door opens when someone steps on the mat because the pressure from their weight activates the door-opening mechanism.

Pressure sensors work as simple yet reliable devices that require users to step on the detection surface for activation. These devices work well in spaces that experience high foot traffic because their sensors work incorrectly when people walk through the area. Floor mats need ongoing upkeep because they experience usage-based deterioration throughout their operational life.

The mats need assessment because foot traffic, dirt, and moisture will compromise their operational capabilities. Pressure sensor mats serve as the primary activation method for older automatic door systems, which need exact activation control.

Microwave Sensors

Another frequently used type of automatic door sensor is the microwave sensor. Microwave sensors work by emitting microwave signals that are reflected by moving objects within the sensor’s detection range. When the sensor notes a change in the reflected signals, it recognizes the motion and opens the door. Compared to infrared sensors, they tend to have a larger range of detection, and if appropriately set up can detect motion through certain materials.

The longer range of detection can be advantageous in large passageways or in areas with high levels of pedestrian activity, as it can detect people approaching the sensor before they reach it. This means the door opens in anticipation of them reaching it. However, the size of the detection area means it must be adjusted carefully so it doesn’t needlessly open due to traffic in the sensor’s surroundings.

Touchless Wave Sensors

Touchless wave sensors have become more commonplace in the recent past, particularly in the healthcare industry and other areas of high cleanliness. These sensors are usually installed on the access side of an automatic door, allowing users to wave a hand in front of a small sensor plate to open the door.

Wave sensors require the user to make a conscious gesture in front of the sensor to open the door, as opposed to motion sensors, which open the door when they sense someone approaching it. Touchless sensors are often installed in accessible entrances, public restrooms, and other controlled access points in commercial buildings, as well as in aids for the disabled.

The need for high cleanliness and touchless operation has accounted for the rapid growth of this category of automatic door sensors.

Laser Safety Sensors

Laser sensors are a more advanced sensor type used on modern automatic door systems. These sensors produce a laser field around the doorway, which scans space for movement, providing accurate information about the ‘presence’ of a person.

Laser safety sensors are able to be precisely identify objects and can be used in sliding or industrial automatic doors. They can differentiate between varied object sizes and different movement directions, which helps to cut down false activation of the sensor, yet still achieves a high level of safety.

Laser sensors can be employed when detailed monitoring of the area around the door is needed. This type of motion sensor is used extensively in environments that require a high level of safety, such as in hospitals, manufacturing facilities, and warehouses.

Generally, laser systems cost more than other types of automatic door sensors, but they are also more accurate.

Choosing the Right Automatic Door Sensor

The choice of sensor technology, therefore, is affected by aspects such as the traffic flow within the building, the type of layout, safety considerations, and the working environment.

In the retail world and shopping malls, motion or microwave sensors are frequently used since they have a great range and usually react quickly. Hospitals prefer to use both motion and presence sensors. In the industrial sector, laser sensors would be found in a high-activity or dangerous place.

It is common for many modern automatic door systems to integrate a range of sensors. With all the sensors working together, such as motion detection and presence detection, a rapid operation can be achieved, which is safe for everyone.

Professional installation and configuration of sensor calibration is advised. Calibrating or installing the sensor incorrectly can cause doors to open or close unnecessarily, present potential hazards, or lead to inefficiencies.

Final Thoughts

Automatic doors automate access by providing convenient, safer entryways for commercial buildings. They increase traffic flow and reduce effort, and when the sensor systems work properly, they are quite safe. Understanding the options for automatic door sensors can help managers and property owners select the right automatic door for their needs.

Motion sensors, presence sensors, infrared detection, pressure mats, microwave technology, touchless wave sensors, and laser scanners all have their own merits. With smart Buildings constantly evolving, automatic doors will become more advanced. Choosing the correct sensor type today ensures a safer and more efficient entryway in the future.