Motion Sensors!

If you are looking at acquiring motion sensors for your home, you will want to ensure you obtain the most appropriate & suitable detectors for your security needs.

If you have a wireless system, you can only use motion detectors that were specifically designed to work with the same model wireless alarm that you have.

PIR Motion Sensor

This is due to components & detection devices that are produced for one wireless system, are not configured to work or communicate with a wireless control panel in another manufacturers system.

Every quality wireless alarm system will generally have 3 or more different wireless motion sensors that are designed to work with the system.   

Although with a hardwired system one has a much greater number of motion detectors to choose from, as most wired components & detection sensors will basically work with any hardwired alarm system.

There are basically three different types of motion detectors that are produced to operate with hardwired & wireless alarm systems.

PIR motion detectors are best used in homes that have no pets that can trigger false alarms.

Dual technology motion detectors will prevent false alarms that repeatedly occur in some troubling environments.

Pet immune motion detectors are designed to ignore a pet(s) of a certain weight that roams freely within in a sensors FOV (field of view).

 PIR Motion Sensors

Motion detectors have been widely used with both residential & commercial alarms systems for a long time. Over the years the technology that makes these detection devices work has changed a few times as newer technologies came along.

The first motion detectors that I remember being used, were ultrasonic motion detectors that used high frequency sound waves to sense movement within a protected area.

It was long after this when motion detectors for alarm systems were using microwave technology.

The microwave motion sensors worked a little like the ultrasonic motion detectors, but instead of sending out sound waves they sent out ultra-high frequency radio waves.

In the 1980s motion detectors for alarm systems started using a passive infrared technology.

PIR (passive infrared) sensors detect infrared energy (heat) that emanates from our bodies.

When someone moves within a protected area the infrared sensor detects their body heat & with it being much higher than the temperature inside the room the sensor is immediately triggered.

Ultrasonic & microwave technologies are still being used today in various types of motion detectors. Although the detectors that are most widely used in today’s home alarm systems are the PIR motion sensors.

Dual Technology Motion Sensors

While PIR technology is more suitable & effective for motion detectors that are used in residential environments, there are still a number of things in a home that can cause them to repeatedly trigger false alarms. Some of these things include air heating vents, heaters, fire places, ceiling fans & air conditioners.

Most false alarms in a home can be avoided by ensuring the motion detector is installed in an appropriate location. Although in certain homes the only way to prevent a PIR sensor from triggering a false alarm, is to replace it with a dual technology motion detector.

False Alarm Spelled Out In Blocks

Dual technology motion sensors were specifically designed to prevent false alarms that are being repeatedly triggered in certain home environments.

Dual technology detectors operate with two different technologies & generally both of them will need to be tripped either at the exact same time or in a precise sequence.

Although some dual technology sensors like those used for lighting in public areas or buildings will trigger the lights to turn on if only one of the technologies are tripped. This is to increase the odds of the lights staying on when people are inside the lighting area.

The two technologies used in dual tech motion detectors are a passive infrared technology & an active microwave technology & they both need to be tripped at the same time before the motion detector will trigger an alarm condition.

Pet Immune Motion Sensors

If you have a pet(s) that will roam freely throughout your home when you are away, you will want to use pet immune motion detectors in your home. There are basically two types of pet immune detectors that you can choose from.

The first one is a PIR motion detector that is specifically designed to overlook or ignore pets under a certain weight. It is really the size of the pet that is being ignored, but they use weight as their criteria where they determine the size of an animal by how much it weighs.

Some of these pet immune PIR sensors are rated to ignore larger size animals, but in my own experience I have found this type of detector is not nearly as effective with larger pets as the dual tech motion sensors below.

The second one is a pet immune dual technology motion detector. This is basically the same as the dual technology sensors discussed above.

Except detectors of this type depending on the specific model, can effectively prevent animals weighing up to 100lbs from triggering a false alarm.

If you have a couple of pets it is really best to keep them separate from each other when your motion detectors are active. If this is not desirable or possible, you will want to add both of their weights together to determine what pet immune detectors will work best for you.

For example: If one pet weighs 35lbs & the other one 45lbs you will want to ensure the motion sensors you acquire can ignore an 80lb animal.

A motion detector that is rated to ignore a 60lb animal will see both pets when they are together as one entity & since this mass is much larger than what the sensor is designed to ignore a false alarm will be triggered.

There are some detectors produced today that function as a regular PIR sensor & there is a switch on them that can be used to instantly turn the sensor in to a pet immune motion detector.

You will also find many pet immune motion detectors that have several sensitivity settings that you can adjust from high to low. The factory default settings in many situations do not need to be changed, but being able to regulate the sensors sensitivity level when it can be helpful makes it a very worthwhile & beneficial feature to have.

Adjusting its sensitivity is about finding the right balance where it will detect anyone entering its FOV (field of view), while it effectively ignores a pet(s) without triggering any false alarms.

Mounting Motion Sensors In The Right Location!

Since the design & configuration of motion detectors can greatly differ from one model to the next, there is no standard placement guide for installing them.

You will want to read any installation instructions that came with your motion detectors, as they generally include placements recommendations that will work best for the type & model sensors you have.

Motion detectors operate much more effectively when someone moves across its detection pattern, as opposed to walking or moving directly towards it.

For example: If you want to detect a criminal’s presence when they walk down a hallway, it is best to locate the motion sensor on one of its side walls where the intruder will walk past the detector & not towards it.

You should never place a motion detector on a shelf or ledge, as it needs to be anchored to a hard flat surface or in a corner where it will not move or vibrate. You also do not want them aimed at heaters, fireplaces, heating vents, ceiling fans or air conditioners, as quick or sudden temperature changes can trigger false alarms.

Motion Detectors for quality wireless alarm systems have RF (radio frequency) transmitters built into them.

The transmitters inform the systems control panel on what it’s operational & battery status is at regular intervals throughout the day, as well as sending it a wireless alarm signal if the sensor has being tripped.

To help ensure nothing interferes with the RF signals being transmitted to the control panel, you should avoid locating any motion sensors near heating or cold air return duct work or other large metal surfaces.  

Most intruders will target the master bedroom in a home after breaking in & this makes it a prime area to locate a motion detector. You may want to consider setting one up inside the room or in an area directly outside of it where an intruder will have to pass thru to enter the room.

Setting up a motion sensor to detect an intruder walking up basement stairs is also another area that should be considered, as breaking in thru a basement window has long being the entry point of choice for many criminals.

You may want to consider strategically locating one or two motion detectors on the main floor of your home where an intruder will have to pass thru. They will want to enter bedroom & family areas in search for jewelry & various high priced electronic items.

Understanding Why Motion Detectors Should Only Be Used As Interior Backup Sensors Is Incredibly Important!

Many monitoring companies & many individuals that install a wireless alarm in their homes will reduce their cost for setting up the system, as they will use a couple of motion sensors to secure the home’s ground level windows.

This type of alarm setup will significantly reduce the level of electronic security your home & family needs. Motion detectors are an interior backup sensor as they should only be used as your homes last line of defense.

In today’s society we need to reduce the odds of our families from ever being victimized by home invasion criminals, sexual predators & other deranged individuals that violently attack people in their homes.

The probability of such violent criminals targeting a specific home is low. Although it is due to the serious nature & consequences of these heinous crimes that it would be irresponsible of us not to address this potential security threat.

Masked Criminal Holding Knife To Womans Throat

We need to do what is reasonably possible to further minimize the risk of our own families ever being victimized by such violent criminals.

Motion sensors become interior backup detectors by securing each accessible window in our homes with a perimeter detection sensor.

We need to significantly increase the odds of an intruder’s presence first being detected while they are still on the outside of our homes.

The only way to achieve this important security objective is to have physical & electronic security measures in place securing each accessible window & door.

A criminal can only cause a motion detector to trip by entering its FOV, but this unfortunately cannot happen until after they are inside the home. With motion sensors securing a home’s windows the security threat becomes more serious when the home is occupied, as they will need to be bypassed (shut down) so no family activity triggers a false alarm.

The last thing you or a family member would ever need is to wake up in the middle of the night & find some deranged person in your bedroom.

I sincerely hope the information outlined on this web page was in some way helpful & beneficial for you. You may want to consider bookmarking this site as new & updated content is uploaded weekly.


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Glass Break Sensors
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Dual Technology Sensors
Dual Technology Sensors Have Eliminated False Alarms In Troubling Environments!


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