An alarm system is comprised of a variation of 4 different components. door and window contacts, motion detectors, keypads, and the control unit. All the contacts can be either wired or wireless depending on which alarm system installed.
Contacts that appear on doors or windows have magnets in them. These magnets are able to determine if a door or window is open based on the magnetic field. If the door or window is shut, then their magnetic fields are connected. If the door or window is opened, then the magnetic field is broken. When the alarm is on and the magnetic field is broken, the alarm will be triggered.
Door Contacts (Wireless)
There are two primary types of door contacts; surface mount and flush mount. Surface mount door contacts are where the contacts and transmitter are attached to the door and door frame. They are viable. Flush mount wireless door contacts are possible depending on the door. This involves drilling the contact and transmitter into the door so they will not be visible. This is not possible for all doors.
Window Contacts (Wireless)
Wireless window contacts are mainly surface mounted. They will stick to the window frame and the window. One thing that must be considered when selecting window contacts is the transmitters size. Depending on how some windows blinds close, a smaller window transmitter may be required.
Motion Detectors / PIR
Motion detectors are often called passive infrared sensors (PIR). This is because the motion detectors track or monitor infrared signals. Technology in some motion detectors allows it to be triggered when a certain size object passes by it. There are motion detectors that can accommodate some pets. One thing to consider is how close the pet will be able to get to the motion detector. For example, to a motion detector, a cat 25 feet away will have a small infrared signal, but a cat jumping off a table 8 feet from the motion detector would look much larger. If a small animal is close enough to the motion detector the motion detector would consider that to be enough to trigger the alarm.
Please see our environmental page for further details on smoke/ CO2 detectors, flood detectors and low-temperature detectors.