Outdoor Motion Sensor
Did you know?
If your house is not protected by a security system then it is 2 to 3 times more likely to be burglarized. (FBI)
A burglary takes place every 14.6 seconds in the United States. (FBI)
33.1% of all burglaries are from unlawful entry. (FBI)
Apart from the loss of valuables, a burglary may leave its victims distressed and in a state of trauma. In order to minimize the chances of becoming the next victim of a burglary, you can invest in a security system, which adequately caters to your security requirements.
Sensing devices form an integral part of a security system and come in various shapes and sizes. Different technologies have been incorporated in the production of these devices, which enhances their precision and accuracy. Motion sensors play an important role in protecting both homes and homeowners.
Imagine a burglar tiptoes across your driveway, or crawls in through the bushes and ultimately gets through your front door. This may happen when you don’t have a home security system installed. Now consider this scenario; as the burglar is tiptoeing across the driveway, a set of flood lights turn on or an alarm goes off and he flees. You can avoid the first scenario by choosing from a variety of outdoor motion detectors, some of the popular options include:
Driveway Motion Sensors – These are designed to detect unusual movements and could be useful to watch over outdoor areas. They can be installed for swimming pools, sheds and garages.
Motion Flood Light – This is designed to work like a driveway alert. The difference is that in response to motion detection in an outdoor area, it turns on a light instead of triggering an alarm.
Motion Detector Guard Dog – This will “bark” if it detects motion. You can place it near your front door or back door.
How Do Motion Sensors Work?
Due to technological advances, ultrasonic motion detectors have been used for the longest time but now quite a few other varieties are also available. Here is how some of the motion sensors work.
Ultrasonic – These sensors are both active and passive; the passive sensors are typically designed to detect specific sounds and are highly sensitive, hence they may be prone to false alarms. Active ultrasonic sensors are designed to emit pulses of ultrasonic waves. It is important to note that some animals particularly dogs and cats have the ability to detect ultrasonic frequencies; therefore if you have a pet, this might not be the most suitable choice for you.
Passive Infrared (PIR) – These sensors are designed to detect movements by sensing heat emitted from bodies. They contain a thin film of pyroelectric material, which generates electricity upon the detection of infrared radiation. These are relatively cheap, designed to be easily installed and provide detection of movement.
Microwave – These sensors are designed to emit microwave pulses and then capture their reflections off of surrounding objects; changes in the reflections enable them to detect movement. They may consume a lot of power and are often designed to operate in cycles, hence they might be easy to get past, if one knows the cycles. It is therefore recommended that these sensors be paired with other sensing devices.
Tomographic – These sensors are designed emit radio waves and detect any disturbances in them caused by moving objects. They are often placed to cover a large area, as the radio waves can move through walls and other objects. Tomographic sensors can be used to secure warehouses, large houses and open areas such as lawns and gardens.
Combined – Certain motion sensors combine different types of technologies, so that when one sensor fails, others are functioning. Dual PIR/microwave sensors are one of the most popular types of combined sensors.
You must choose the sensor that best serves your need; it is common to use a combination of sensors as it increases the chances of detecting movements.
Q:Does a motion sensor detect movement through walls?
A:Motion sensors that detect movement through walls have recently been introduced in the market. These motion detectors are currently being used in video games. However, most detectors or sensors used for security purpose do not have the capability to detect motion through walls. You may still find good quality motion detectors that meet your security needs.
Q:What is a good brand and model of outdoor motion light?
A:A number of brands and models of outdoor motion lights are available in the market. However, the suitability of a brand and model will depend on your individual needs. There are three things that you would need to consider to buy a suitable product, which include the distance covered by the motion detector, the things motion detector will be able to detect, and the watts used in a motion detector light.