Motion Detector vs Window Sensor

First and foremost, there is no true winner between motion detectors and window sensors. They are two totally different devices that use different types of protection to secure your property. As you will see from the information below, there are pros and cons to each device. It is also imperative to take into account the style of window you are protecting when choosing the proper sensor to use.

If you have a traditional locking double-hung window, the best protection would be to install a window sensor on each window. For a simple surface mount sensor, check out the Honeywell 5816 wireless window sensor or the newer, slimmer Honeywell 5811 wireless window sensor. For recessed options, check out the Honeywell 5800MICRA or the Honeywell 5800RPS. Protecting your windows with sensors will prevent you from accidentally leaving a window open when arming the system. It will also ensure that your alarm is triggered as soon as the criminal opens the window to enter the property.

However, the disadvantage of using window sensors is that the window must actually be opened for the alarm to be activated. If the window is large enough for a criminal to break the glass and climb through the opening, a window sensor would not protect from that type of break in. Therefore, motion sensors are a great alternative and can even be used in conjunction with window sensors for the absolute best protection.

Do you have a large open space with several windows? Drive down the cost of your hardware without compromising the integrity of your alarm system by using motion detection. While it can get expensive to protect every window with a window sensor, you can use one motion in a room with many windows to save on money without sacrificing too much protection. You will also go this route if your windows do not open or lock in a way, as a window sensor would never be triggered. The Honeywell 5800PIR-RES is our most affordable, wireless motion sensor. With its pet immunity (up to 80 pounds), this motion can be mounted exactly where you need it, to best protect a room against intrusion without worrying about wiring. With a motion detector, it does not matter how the criminal gets into the house as the motion will activate the alarm once the intruder walks in front of the motion. Installing a few motion sensors in key areas of your home is a great way to protect against any type of break in.

Finally, if you would like faster, preemptive intrusion detection check out the Honeywell 5853 wireless glass break. This is a great option for scaring away intruders before they actually enter your secured premises as the sensor is activated as soon as the window pane is smashed. Read our FAQ on the difference between motion sensors and glass break detectors to help you choose the best protection for your home or business!

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Yes, if you have unprotected windows and no interior protection (motion detectors), you would be susceptible to a break in with no alarm being triggered.
We find shock sensors can be prone to false alarms from thunder or high winds but in the right application a contact with integrated shock can offer dual protection like you say.
So if you have a alarm system with no sensor on the Windows can a intruder still get in and out
Actually window sensors that only have an open/close feature, but they have a sensor that will cover you for both open/close as well as vibration. so its dual purpose and called a shock sensor.
Actually, window sensors offer a false sense of protection as they will only activate with the window is opened. With most windows that are locked, the only way to gain access through a window is by smashing the window pane. If someone were to do that and climb through the smashed pane without opening the window, the wired window sensors would offer no protection. You really should use a mixture of contacts, glass breaks and motions to fully protect your home. You can do this with wired or wireless or hybrid (wired and wireless) systems.
A glass break will only trigger if the window is shattered. A shock sensor could detect the window being forced open as it detects vibrations.
A man from ADT was just hear and told me I do not need window contacts if I have a glass break sensor. He said any noise made by some one forcing a window open would set it off. Is this true?

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