Motion detectors most often are infrared detection sensors that can be integrated into different devices in the environment. This sensor provides motion data for the device to alert users of motion in the environment or perform specific tasks. For example, a motion detector attached to a theft alarm system can detect movement and an alarm can alert homeowners or activate a camera.

Motion detectors are categorized according to motion detection. The two categories are mentioned here and a brief explanation of how they work.

Active Detector is also known as a radar motion detector, the activated sensor sends waves or radio waves. Radio waves are reflected by nearby objects and reflected by the detector. The sensor looks for a Doppler (frequency) shift in the wave as it returns to the detector. This indicates that the wave hit a moving object. When Doppler shift is detected, it is activated to indicate that motion has been detected.

Passive detectors-Infrared (heat) energy levels are analyzed by passive detectors. The sensor can detect objects that differ from the ambient temperature of the area to be scanned. For example, a person emits 9-10 µm infrared energy. When you receive this signal and move around the area, motion is detected.

What Do Motion Sensors Do?

Motion sensors detect all movement that occurs in the “field of view” of the device, the area of ​​the house that is monitored by the product. The motion detector can detect sudden and suspicious movements in the detection area. If there is movement in the area that the detector is constantly scanning, the motion detector will be activated. 

If you decide to integrate multiple motion detectors into your home security system, the motion detectors will trigger defensive actions. For example, a home security alarm, an indoor home security camera, or a security light will come on. When the motion sensor detects suspicious movement, the motion detector triggers the appropriate alert through your home security device and product. 

 This instant notification triggers home security settings that you create at home and saves valuable time in the event of an intrusion. Preparing a motion sensor to detect the movement of an intruder, sounding a home security alarm to alert you and your family about an intruder, or a passerby or police patrol. When you incorporate motion detectors into your home security systems, such as emergency lights or home security cameras, the motion sensor activates them or starts recording security footage. 

For the smart home security system, alerts from the built-in motion sensor can also send home security alarm notifications to selected smart devices. You will be notified as soon as possible about your home security issues wherever you are. Therefore, the motion detector is an integral part of a functioning home security system and helps protect homes, families, and household items from damage. With home security motion detectors, you can monitor the security status of your home, sound alarms, and trigger other home security products to prevent intruders from continuing your property.

Applications of Motion Sensors

Lights with motion detectors – It is very effective because you can get a clear view even at the peak of the night. They inform homeowners if there are thieves outside at night. If the homeowner forgets to turn off the lights, they will do so automatically, so they are also cost-effective. Alarm with motion detectors – Normally integrated with an intruder detector, it sounds when an intruder is detected. They are used to stop thieves and protect your home.

Cameras and motion detectors – These are like CCTV cameras that help detect intruders. These can be used to raise an alarm or send a notification when an unauthorized entry is observed. Placing these small but effective cameras in the right places can greatly improve security and give you peace of mind.

Motion sensors are also used to detect vehicles when unauthorized vehicles enter the driveway. These sensors are also an important part of the wireless doorbell. Motion sensors alert you when a guest arrives at the gate, eliminating the use of the traditional entrance bell.

What Are the Different Types of Motion Sensors?

There are many types of motion sensors in the market like microwave sensors. The microwave pulses emitted by these sensors can detect reflections from moving objects. The big advantage of these motion sensors over infrared motion sensors is that they cover a wide range. The disadvantage is that it is very sensitive to electrical interference and is usually more expensive. 

A surface reflection sensor is another option. The technology behind these sensors allows LEDs to emit infrared light and detect reflections from moving objects. As soon as a person enters a particular area, a motion sensor detects this and notifies the homeowner. A dual technology motion sensor works with a combination of several detection methods. This helps reduce the number of false positives. Dual technology sensors can be combined with passive infrared and microwave sensors. The spectrum in which these sensors work varies from passive to active. 

Many sensors can cause false positives, but dual technology sensors minimize the number of false positives. This is because the alarm needs to trigger two sensors to alert you. If you have a pet in your house you can get the pet’s immune sensor to solve the problem by triggering the sensor when it detects an animal. Contact sensors detect movement at doors and windows. When the door or window opens, the magnet associated with the sensor separates. This triggers a signal and triggers an alarm in the security system.

Final Thoughts

Motion sensors are a very useful device for keeping your home security system up to date and functioning. As the technology evolved rapidly over the years, many features have been incorporated into many new motion sensors. It’s best to look at the features and prices of motion sensors based on your needs before you go on the market and buy.