Access control motion sensors are found everywhere today and function by detecting a vehicle or person approaching an exit and unlock the door. Motions sensors for access control can take over the job of push-to-exit buttons. They are mounted right over the door at the inside of the door frame. Due to their security system can trigger motion and thus unlock the door right when you walk up to the door to exit the space. For example, it is prevalent to see automatic gates in grocery stores, banks, or malls that use radar to detect when someone passes near the access control entrance to open. The box above the door sends out a burst of microwave radio energy and waits for the reflected energy to bounce back. When a person moves into the field of microwave energy, it changes the amount of reflected energy or the time it takes for the reflection to arrive, and the box opens the door. Since most of these devices use radar, they often set off radar detectors.



In grocery stores, banks, or malls, it is widespread to see automatic doors that use radar to detect when someone passes near the entrance to open. Radar sensors work by “radiating electromagnetic energy and detecting the echo returned from reflecting objects.” The box above the door of motions sensors for access control sends out and waits for the reflected energy to bounce back. When a person moves into the field of microwave energy, it changes the amount of reflected energy or the time it takes for the reflection to arrive, and the box opens the door.



Unlike radar sensors, infrared sensors are passive; instead of emitting energy to detect changes, they are capable of detecting radiation. Passive infrared (PIR) motion detector technology uses infrared sensors. Access control systems sensors detect infrared energy that and emit from human body heat. Infrared sensors are made from different materials that sense different ranges of infrared wavelengths. When an appropriate wavelength of infrared radiation strikes one of the material’s cells, it changes its resistance.

By measuring the resistance of the cell, one can measure its infrared radiation since many different alive and inert objects emit a certain level of infrared radiation. This security system is convenient for the sensors to detect rapid changes in infrared radiation instead of a particular wavelength. Though infrared energy is bound to fluctuate, the sensors are specifically designed to trigger when more rapid changes occur in the field. When a sensor detects an immediate change, the increase in energy can trigger a burglar alarm system and alert the monitoring or police of the activity right away (usually both). Other examples are access control motion sensors porch lights. The sensor detects a sudden change in infrared radiation and triggers the light to turn on.


The term Photocell (Photo-Beam, photo-eye) is a non-contact sensor that can protect entrapment areas when the gate is moving open or closed. A photo-sensor motion detector of access control systems uses focused light such as a laser beam and a light sensor to detect movement or activity. In your building security systems, the beam is aimed directly at the light sensor from a space distance between rooms in your building. These access control motion sensors use on a driveway or garage gate as a safety device. They are used to prevent an entrance from closing on a vehicle in its path. They are also used to prevent a gate from closing on a person between a fence or wall. The blocked beam will trigger the alarm via the control panel or box if someone travels between the light source and sensor.


Vehicle Loops and Loop Detectors use access control systems to detect the presence of a vehicle to open a gate or as a safety device to prevent the entrance from closing on a car in its path. The Inductive-Loop Traffic Detectors are installing on the pavement. The security systems can detect vehicles passing or arriving at a certain point, such as approaching a traffic light or motorway traffic.


Push-To-Exit Buttons, also known as “Request-to-Exit,” are wall-mounted buttons near the exit point and contain directions on a large green or red button. When the button is pressing, it releases the door.


Push Bars, also known as Panic Bars, are reliable tools for opening locked doors from within a premise, attach across the inside of the door at the height of the door latch. Motions sensors for access control doors equipped with push bars are opened by simply pushing the horizontal metal bar. This action releases the latch, and the door opens. It can be set to immediately lock upon closure due to a loaded spring located within the enclosed body.



Emergency Door Releases are available in two general types and are attached to a wall near the exit point. The first type is a “Break-Glass Emergency Release” button and to gain access to the exit. You break the glass face. This action depresses a button inside the switch and releases the door. The second type uses an “Emergency Door Release Pull Station,” a pull-box with a T-bar handle imprinted with an arrow and the words “Pull Down.” When the T-bar is pulled down, the door is released.

Are you interested in a access control system in Miami at your property or business by installing an access control motion sensor? If so, look no further! At Dicsan Technology, our professional and experienced technicians are ready to install or answer any questions you have about these systems. Contact Us