Infrared Motion Detector
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 Wireless PIR Motion Sensor Sensitive Passive Infrared Detector  US $9.99
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 LONG RANGE INFRARED SENSOR MODULE MOTION DETECTOR US $9.99
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 sensitivity Infrared Motion Sensor Detector PIR ADJ US $9.99
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 Pyroelectric Infrared PIR Motion Sensor Detector Module 33x25mm US $1.00
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 Pyroelectric Infrared PIR Motion Sensor Detector Module 3218 US $.01
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How A Home Security Motion Sensor Alerts You To Possible Intrusions
A good home security motion sensor is able to detect a number of factors including light and radar as well as infrared rays and even microwave rays. At the heart of a home security motion sensor lays the radar that is able to detect movement in the entire area covered by the sensor. Typically, a home security motion sensor is located above a door from where it emits rays and then waits till the reflected energy comes back to it. Whenever someone moves through the door there will be a change in the reflected energy and furthermore there is also a delay before this energy returns to the detector and this delay is what causes the detector to sound the burglar alarm. For people who want to know more about home renovations North Shore, new roof treatment or concrete tile roof treatment, you can check online for details.
As soon as the home security motion sensor triggers the alarm the owner of the home will realize that an intrusion has taken place. In most cases, the home security motion sensor will make use of infrared rays that detect changes in heat. When you use a single home security motion sensor that uses infrared and you install such a sensor in one corner of the room and close to the ceiling it will be able to monitor the entire room.
The working of the infrared home security motion sensor can be explained by looking at its ability to detect heat that a human body produces. As soon as a person enters the room there will be changes to the room’s heat signature and this change triggers the sensor. However, because infrared sensors are very sensitive to heat they should not be used in the outdoors or in rooms with excessive sunlight as the risk of false alarms increases.
However, a home security motion sensor such as the LX-802N motion detector comes with sunlight immunity and this can address the sunlight issues. On the other hand to prevent the home security motion sensor from sounding false alarms every time your pet enters the room you will need to use a pet-immune home security motion sensor such as the K980-Visionic Pet Immune Infrared Sensor.
The home security door sensor is a different kind of sensor altogether. It is a kind of sensor that magnetically senses movement of the door. Such sensors are rather small in size and they generally consist of a single magnet and one magnetic sensor which need to be placed so that they are parallel to one another. Every time the signal between the sensor and magnet is interrupted the magnetic switch gets tripped and an alarm is sounded.
is infrared used in motion detectors at home dangereous to health?
A motion detector doesn't give off any infrared energy. It is a "passive detector". We humans give off an infrared signature that a motion detector can detect. Thus, the motion detector is harmless.
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