| |
| |
|
Home Security Information |
|
|
|
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!) 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
MORE RESOURCES:
home security - Google News |
|
|
|
RELATED ARTICLES
Alarm System: Smoke and Heat Detectors Smoke & Heat Detectors- Smoke detectors are available that will interface with your security system. The smoke detectors that are already in your home can't be tied into your security system. Alarm System: Glass Break Detectors Alarm System Glass-break detectors- Glass-break detectors are also known as "Audio Discriminators". They are a perimeter device because they catch a burglar attempting to make entry into your home or business as opposed to walking around the interior and being picked up by a motion detector. Home Security - Defend Your Home and Possessions Against Intruders! With all of the emphasis in the past few years on Homeland Security, many people have overlooked the importance of home security. While it might not make the first story on the news, when your house is burgled, safeguarding your home soon becomes the most important issue in your world. Alarm System Keypads The keypad is the device you and your loved ones will interface with daily. It is typically placed at one or more of the following locations:* House to garage door hall. Life Insurance - Wise Investment to Protect Your Home or Excessive Caution? Life insurance is typically taken out to offer valuable financial protection for your family in the event of your death, upon which a payment is made to your financial beneficiaries, heirs or family members. The extent of this payment will depend on your insured sum and earnings. How to Keep Your Postal Mail Private and Secure Surreptious opening of most envelopes sent through the mail takes little effort and only minimal skill. Instructions are readily available on the Internet and in books suc as "CIA Flaps and Seals Manual" (Paladin Press). Tips for Keeping Your Home Invasion Free Home invasion formerly known as burglary is the type of crime that you can do something to prevent. Home invasion falls into two categories burglary and robbery. The Real Desire for the UK House Buyer Location location location, central heating, air conditioning, double glazing, good neighbours,good schools and a long lease these are just some of the factors that buyers consider when buying a property. So it was some surprise when we learnt that that new UK research (Jan 05) commissioned by the Homebuyer Show revealed something completely different. Hurricane Preparedness If you are about to get hit by a Hurricane are you prepared? Do you have enough plywood to board up your windows? Often the local lumber companies will be sold out. In fact if you wait till the last minute Home Depot will be out too. Security Alarm System Motion Detectors Passive Infrared Motion Detectors- These detectors are also known as PIR detectors. The technology they utilize is "passive infrared". Alarm System: Sirens Alarm Sirens- There is both inside and outside sirens. Many towns have a noise ordinance, which should prevent your installer from putting yours outside, unless you are on a ranch where you need to know what's going on while your out in the barn. Estate and Mega-Yacht Security Systems and Safe Rooms Why do I need a "safe room? I really don't need one; I'm not that high profile". This is typical V. Security Cameras For Your Peace of Mind The reasons for installing cctv cameras are the same whether you own a home or business. Protecting your property, family and employees is probably at the top of your list of priorities. Handling Weather Emergencies: Part 2; Home Security, Evacuation, and Emergency Kits IntroductionPart 1 of this article on preparing for weather emergencies discussed forming an emergency plan to reduce the stress and worry of facing a full blown weather crisis.The focus was on safeguarding your family by planning well in advance of any threat. Protect Your Family From Solar Flares Protect your family from solar flares. Solar flares emit dangerous gamma radiation, which affects everything from gravity waves to the Earth's tectonic system. Pepper Spray Considerations Choosing the Right Pepper SprayThere are so many types of pepper spray on the market today that it has become confusing for you to decide which one to get. There are three basic chemical compounds that compose these defensive sprays. Neighborhood Mobile Watch Patrol Have you found yourself disgusted with the crime lately. You know much of it is gang and drug related yet cannot understand how it has infiltrated your quiet town or how it has become such a menus in your city? Have you recently been a victim of a crime, vandalism or petty theft. Emergency - Gas Fire! Woooooooo??Woooo???The siren sounded. All of us looked at each other with excitement. Surveillance Camera Positioning It is a known fact that advertising is made to attract our eyes. Marketers work very hard to plant visual memories in your mind. Numbers That Can Save Your Life It's one of those things we don't give a second thought about. Many of us move into a house and never even change the number that's on the house.
|
| Article List | Index | Site Map |
|
All logos, trademarks and articles on this site are property and copyright of their respective owner(s).
The comments are property of their posters, all the rest is Copyright © 2006 CanadaSEEK.com - All Rights Reserved. |
Comment by John S. Baick
