This article is the third of a series devoted to helping the common person install a DIY Self-Monitored Home Security Alarm. The instructions that we provide throughout this series of articles will be focused on the security systems listed below but you will find that our tips and tricks can be utilized with just about any DIY Home Security Alarm available on the market. In the end, it really does not matter where or what kind of security alarm that you get, the important thing is that you get a security system that you feel comfortable with and that it provides you with the peace of mind that you are seeking.
- $99 Basic Security System
- $199 Gold Series Home Security Solution Package
- $249 Platinum Series Home Security Solution Package
MOTION SENSORS
How Do They Work?
The Motion Sensors that you find with alarm systems today are much more technologically advanced than the motion sensors of old. In the past, motion sensors did just what they were intended to do.. detect motion. Some models were triggered by vibration and others by simple movement. As you can imagine, this type of sensor was not very reliable and probably quick to provide false alarms. The motion sensors you find today work off of infrared technology. Which means that they track motion by sensing heat movement. If a mass of heat moves within range of the sensor, it will be triggered. So, if a book were to fall off of a shelf, since it does not generate a heat trail, it would not trigger the new style of sensors (but it would be sure to set off the old style).
Motion sensors have a zone of reference that depicts the range and spectrum of the sensors. When you are installing your motion sensors, you will to know what the zone of reference is for your sensor to better identify the best location for it to be installed. The motion sensor that you can find with our kits mentioned above has a fairly standard zone of reference. It can pick up movement up to 30ft to the front of it. It has a 90 degree range of horizontal coverage and a 30 degree range for vertical coverage. The following picture helps to demonstrate this better.

Where Do I Install Them?
Motion sensors are a wonderful compliment to any home security system. Some people even choose to protect their homes with nothing but motion sensors (However, SmartSecurityPeople.com recommends that you maintain window/door sensors on the most accessible entry points to your home). When you are installing them in your home or business setting, you will want to find a place in which they will be the most effective. Usually, this can be in a stairwell, at the end of a hallway, or in the corner of a large open room. Basically, you want to install them anywhere that would be a normal traffic pattern for people moving through your house.
In addition, the nice thing about motion sensors is that you can protect an entire room with just one of them. So, if you have a room that has a lot of windows and doors, you may want to consider installing a motion sensor and only a few window/door sensors. Hopefully this gives you some ideas to work with regarding location of your motion sensors.
How Do I Install Them?
All of our motion sensors (like many others out there) operate wirelessly using encrypted radio frequency. So you don’t have to worry about running wires all over your house like you did with the older versions. Our motion sensors need 4AA batteries to operate and we encourage you to use alkaline batteries. Alkaline batteries are recommended for any technologically advanced electrical device so your motion sensors definitely would benefit from them. We estimate that you will get at least 5 years of use from one round of alkaline batteries in your motion sensor.
It is important that your motion sensors do not have an obstructed view of sight. They should not be installed behind large pieces of furniture, flower arrangements, or in areas that inhibit their zone of reference. Over the years we have found that motion sensors work best when placed in a corner of a room. We also recommend that you install them at about 7-8 ft from the floor (as close to the ceiling as possible). This will allow the motion to have greater range for sensing movement. If you have to use a dining room chair to install them, then you are at the right height. If you are going for the ladder in your garage, you may be installing them too high.
The motion sensors include a tilt/swivel mounting bracket. So, once you have them installed, you can adjust them up and down and side to side to see what position works best for the area you are trying to provide coverage. If you are putting the motion sensor at the top of a staircase, you will definitely want to point it down so that it picks up any movement at the bottom of the stairs.
Any Tips and Tricks?
We wouldn’t be very Smart Security People if we didn’t have a tip or trick for our readers now would we? Motion sensors provide pretty basic operation so there really isn’t anything too amazing or brain rattling that we can share with you. However, over the years we have had numerous inquiries from our readers about pet immune motion sensors. The following information hopefully helps to clarify how you can make any standard motion sensor into a pet immune motion sensor for free (or almost free).
We already discussed how motion sensors have a zone of reference and we supplied you with the sample chart above going into greater detail. So what does all that mean? Well, this information helps up to figure out how we can make the best use of your motion sensor while avoiding false alarms from “Fido”. You have 2 solutions: You can either tilt your motion sensor up or you can put a piece of medical tape on the bottom half of the sensor. (We suggest medical tape only because it will blend in better with the color of your sensor.) The ultimate effect of either of these solutions is that you now have a motion sensor that only detects movement that occurs higher than 3 feet off of the floor. If your dog is taller than 3 feet, then you probably don’t need a security system! Keep in mind though, if your potential robbers are vertically challenged (short) they could avoid this set-up as well.
The question that always comes to mind: Is this how other pet-immune motion sensors work? The answer is most probably no. The pet-immune motions sensors of today have circuitry built into them that only cause the alarm to be triggered if a large mass of movement is detected (usually anything under 40 lbs is ok). That is how these sensors differentiate between human movement and pet movement. If the sensor detects movement by an object larger than 40 lbs, it will trigger the alarm. Under 40lbs, no alarm. As long as you are not being robbed by anorexic robbers or kindergartners, you should be just fine with a standard pet-immune motion sensor.
Visual Aids!
We know you like pictures, so we are always glad to please our reader base by providing you with plenty of them! The following are a few pictures of motion sensors in action from different installations over the years. Enjoy!
Motion Sensor On Swivel Tilt Wall Mount

Straight On View Of Motion Sensor

Motion Sensor Pointing Down Stairwell

ok..let’s summarize once again.. You have picked the alarm system that is right for you and now you have successfully installed all of your Window/Door Sensors and your Motion Sensors. So what is next you ask? Well, the next article in this series will be touching upon Sirens! What would an alarm be without a siren..um I guess it would be a silent alarm.
Anyway, we hope that you are finding these articles useful. We appreciate all of our readers at SmartSecurityPeople.com. If you have additional tips and tricks you would like to share, please feel free to do so by leaving a comment below!








