Security Alarm System Motion Detectors

Passive Infrared Motion Detectors- These detectors are also known as PIR detectors. The technology they utilize is "passive infrared". The device is mounted on a wall or in the corner of a room. It sends invisible fingers out into the covered area in several layers. The top layer goes the furthest and averages about 60 feet straight ahead and 35 feet on the sides.

The center layer of beams spreads the area about mid way and the bottom layer sweeps the room closest to the detector. These beams individually measure the infrared temperature of what ever they land on and look for a clash of temperature against that point. For example if a beam lands on your couch and knows what temperature it is, when you walk in front of the couch your temperature is different and causes a violation. You would be hard pressed to match the temperature of everything in your home as you walk about and that makes motion detectors hard to compromise.

Passive motion detectors have a microchip in them that will adjust the device for slow and methodical temperature changes. This way as your room warms up and cools down during an armed alarm period, you will not get a false alarm.

Some motion detectors are designed to be mounted in the ceiling and spread a 360-degree cone downward. Some are recessed to replicate an electric outlet and various other combinations are available for the James Bond like clients. Most often the device is an aesthetically pleasing small device that is mounted 5-7 feet high in the corner of a room.

Passive infrared motion detectors will not see through walls or windows as they will consider touching one of them as their final destination and begin calculating the temperature. The beams project forward only and will not bend around corners. If your device is placed where a beam can go into an area with an opened door, it will protect the interior of that area as well. Once the door is closed the beam will terminate on that door.

Motion detectors are not going to protect every square inch of your home or business unless you invest in many of them to accomplish that. Instead you should intelligently place them as an interior trap in an area or areas most likely to be violated by the creep or creeps that want to take your belongings or worst off violate you personally. Usually one placed properly on the main floor and one on the lower level if you have one, will serve as good traps. Stairways are often a good thing to consider when placing the device, due to the fact that you will prevent unauthorized passage from one floor to the next.

(HOT TIP!)

An alarm installer should always place a device where it will best serve the user and achieve the most coverage. Many an installer has elected to forgo this concept so that they can install the device in an area that is easier to get to with the wires. Insist on discussing all placement options with your installer before they place each motion detector. You can bet that your interests will be prioritized when they see your involvement in the decision process.

Dual Technology PIR- Dual means two technologies are used in one device. Both technologies must be violated to cause an alarm. These devices are used in harsh environments such as a garage or sun- room. The first technology is passive infrared and works as explained above. The second technology is most often Doppler and looks for the invisible movement of air. If you walk into a room the air has to move as your body mass pushes it along. The reason you would want a dual technology device is clear when you apply common sense to the desired area of protection. For example let's say you pull your car in to a cool garage, go in the house and turn the alarm on for the night. Your motion detector that you put in your garage will see a dramatic temperature change as the heat from your engine radiates into the cool air. If you had a duel technology motion detector it would not see the air moving because your car is still, so it will refuse to go into an alarm condition.

Pet Immune Motion detector- This is a wonderful advancement in motion detection that may work for you if your pet free- roams your house while you are away and have your motion detectors on. Before the introduction of this technology the pet owner had to either confine their pets from the protected area or bypass the motion detector rendering it useless unless the pet was out of the home with them. The technology is the same as the regular passive infrared detectors. On the pet immune version there are two sets of beams that are offset from each other. Your pet must hit two pre- assigned beams simultaneously in order to violate the detector. Pets under a certain amount of weight (up to 85 pounds) are not long enough to hit both beams so it does not see them. A human torso is designed much differently as per a weight to length ratio causing them to violate either a horizontal or vertical pair of beams, depending on their favorite burglarizing posture.

On the pet immune detectors the middle and lower span of beams are pet immune but the top layer is not, due to the distance of separation between the farthest-reaching beams. Care must be taken on the placement of these devices restricting the high beams from stairways and high ledges your cat may get up on. (6-7 feet high) A good technician will mask only the beams that hit these trouble spots expanding your coverage options.

Remember that even though your device is technically restricted for use by weight of your pet, two or more small animals will have an opportunity to hit the two proper beams while playing with each other. I do not recommend that you use these devices with two or more pets no matter how small they are, unless one of them is rarely moving about. Also one free flying bird will look like a dinosaur entered the room if it flies close to the detector. (They have yet to design the "Dinosaur Immune Detector")

If your pets do not fall into the allowances for using a pet immune motion detector then you should consider other options for creating interior traps. The well- designed system protects your perimeter as well as possible and creates interior traps in case the perimeter is circumvented.

Matthew Francis Alarms@expertsknow.com

22 year veteran of the alarm industry
Installer, salesman, licensed alarm company owner, monitoring station designer, promotions and marketing director with one of the worlds largest security dealers. He now works as a consumer advocate, teaching consumers how to buy or get systems for free (without being taken). He is committed to being unbiased. His web site is http://www.expertsknow.com

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Mini HD Spy Camera- Motion Detection, Video, Webcam, & Camera!

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Motion Detectors For Home Security

In these troubled economic times, crime is on the increase. Especially, it seems, home invasions. Criminals of all stripes, from the cagey professionals to the confused addicts, are trying their luck against suburban castles for a chance at great rewards. As such, there is much to gain in upgrading your home security with a few extras. You can set up flood lights, tall fences, and alarm systems. You can get dogs, or security bars on your doors and windows. There are any number of options when it comes to home security.

Combinations are Good
Lights, fences and alarms are all well and good on their own. Combinations are even better. But, for the ultimate home security experience, consider adding motion detectors to your repertoire. Why? Well, if used in conjunction with other security measures, motion detectors can keep would-be thieves from even getting close to your valuables. Too, they're a quiet form of security device, and perfect for someone looking to keep their home security surveillance systems unobtrusive.

Sense Motion
Motion detectors work on a simple principle - they sense motion. They are devices that contain mechanisms which quantify motions and can be easily integrated with other devices. There are several basic types. The passive infrared motion detectors, which can sense body heat and emit no energy. Then there are ultrasonic units, which emit pulses and measure the reflections off of a moving target. And, of course, there are the detectors that send out microwave pulses and measure the reflections. Each of these work on the same basic principle...they 'see' motion and send a signal to an alarm system, alerting you of the presence of potential intruder. These are all available as wireless motion detectors which make them continue to operate even if there is a power failure either system-wide or deliberate.

Trigger Floodlights
Now, imagine a motion detector used to trigger a set of flood lights. The thief trips the detector and the floodlights snap on, blinding the thief and illuminating his shape. Startled, he decides against continuing his efforts to relieve you of your valuables. Or, as is more common, you could integrate your motion detector with an alarm or siren system. This latter set-up can quickly become a pain, however, especially if your motion detectors are too sensitive. You can even use them in conjunction with silent alarms, that is calling a security service.

Downsides
Speaking of which, there are downsides to using motion detectors, as with any security devices. If they are set too sensitive, they can activate your secondary security systems on account of squirrels, leaves caught in the wind and even insects. Set too low, and they'll miss a light-footed thief. Motion detectors should only be used if you are serious about home security, as they can cause just as many problems as they can prevent.

Fake Them Out
Install a fake version of a well-known motion detector in a visible location. any would be burglar will see this and wonder is it real, or maybe he will just take it as a working detector. A fake motion detector is cheap and even though it is a bluff, probably will work to keep those intent on break in in, deciding to move on to an easier mark.

Webcam
Combining a camera, some software, and a motion detector together to make a webcam motion detector will allow you to view the scene from a remote location on your laptop whenever someone trips the detector. Welcome to the twenty-first century.

But, as far as home security goes, installing motion detectors is a good idea. Connected to lights or alarms (silent or otherwise), they can give your home that extra bit of security you've been looking for. Simply make sure that they're set properly, and motion detectors can serve as an essential part of any home security system.

Mac Abley is a Home Security enthusiast. Visit All About Home Security for tips about home security surveillance [http://www.allabouthomesecurity.com/InstallH.xhtml] and other resources you can use right now to setup your own rock-solid home security system.

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Motion Detectors Come in a Wide Variety of Forms to Suit Your Personal Safety Needs

Motion Detectors are standard pieces of any home security system. Useful to both residential and commercial sites, motion detectors use infrared sensors, known as IR channels, to detect movement within a certain range of a given environment. Whether your concern is to protect your home or office indoors or outdoors, motion detectors come in a wide variety of forms to suit your personal safety needs.

Indoor Infrared Motion Detectors. These use infrared or passive infrared (PIR) sensors to alert you to particular levels of heat and/or movement in a particular room or space. PIR sensors have specific limits on sensing to avoid alerting you to movements set off by small animals. Coverage for all types ranges from 18'x40' to 50'x50' and all sizes in between. When activated, indoor infrared motion detectors will alert the police or the homeowner, depending upon the system you choose.

Ceiling-Mounted Motion Detectors. Some are designed for a ceiling mounting, which allows for 360° coverage. They are especially suited to rooms wherein sensing from a corner-mounted detector could be blocked by shelving or storage units. Activation works in the same way as it does with other indoor motion detectors; the IR channel or PIR sensor alerts you or your local police when it encounters a particular range of heat and movement.

Pet Immune Motion Detectors. If you own a pet or pets and want to stop them from triggering a false alarm with your motion detectors, there is an array of pet immune products that will keep your home safe without risking a false alarm. Pet immune motion detectors use PIR in most cases to avoid being triggered by a small animal. Smaller changes in temperature will not register in the same zone as heat produced by humans, and will not trigger motion detectors to alert you of intrusion.

Wireless Motion Detectors. For homeowners interested in the latest technology in detection, wireless detectors are "it." Wireless motion detectors are typically more expensive than conventional motion detectors, but their advanced yet simple features make them worth a little extra money to many homeowners. Battery-operated and customizable, wireless motion detectors use the same infrared sensing technology and are also available in pet immune forms.

Outdoor Motion Detectors. These devices are popular for both residential and commercial protection. Outdoor motion detectors trigger lights to come on when a person or vehicle is within a certain range (usually 40-50 feet) of your home or office. This system not only deters potential intruders, but also makes its owners feel safer when walking from the car to home or office at night.

Spy Motion Detectors. For all the 007-wannabes out there and the inner spy in all of us, there are several styles of spy detectors to choose for your residence or commercial site. Spy detectors can serve several functions; in addition to sensing motion through stealth PIR detection, they can also alert your phone or pager, allow you to use your own voice to ward off intruders, or record intrusions with a camera that allows you to view captured images through your TV/VCR system. Most of these detectors have multiple mounting capabilities, including wall, ceiling, or behind a wall. Spy detectors are often used in museums to protect visitors or intruders from stealing art objects. You can use the same system, however, in your own home or office.

Announcement Motion Detectors. When you want to know who's pulling into the driveway, knocking at the door, or milling around your commercial site, you need one of these. Announcement motion detectors alert you, via tone or recorded language message, to who is near your home or office. Most function within a 2 mile radius, and are available in wireless or handheld forms as well. Some announcement detectors allow you to speak through to the base system and address the person or persons detected; others alert you to such a presence through a particular tone sound or message.

They are essential to any security system, within or without your home or office. Nearly all of them are RFI (radio frequency interference) immune, and use progressive PIR technology to give you tight security without triggering false alarms.

Indoor motion detectors are highly affordable, and range from $18-95. Outdoor motion detectors, at $80-150, are reasonably priced for their sensing capabilities. Wireless detectors are in a similar price range to the outdoor variety, at $70-150. Spy motion detectors, the most advanced equipment you can fine, typically range from $45-225.

Whatever your desired level of residential or commercial security, there is a broad miscellany of motion detectors to choose from, within a diverse range of prices. You are certain to find exactly what you need to keep your site safe and secure from unwanted intrusion.

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