Door & Window Alarm Sensors Frequently Asked Questions
Where Can I Buy Door Contacts for My Alarm System?
Alarm Grid sells all the door contacts you need for your alarm system. We offer hardwired and wireless contacts in surface-mount and recessed varieties. Learn about door contacts.
Will Any Magnet Work w/ a Door or Window Alarm Sensor?
A magnet's job for a contact sensor is to keep the reed switch closed. In theory, this can be done by any magnet. But it may not be practical. Learn about door and window sensors.
Do Alarm System Door Contacts Need a Power Supply?
Door contacts operate using a built-in reed switch and magnet. No power supply is needed. But wireless contacts use power to communicate with the panel. Learn about door contacts.
Where Do I Install a Sensor Contact on a Door?
The best place to install a contact is on a door frame. The magnet should be installed on the moving part of the door, within a half-inch of the sensor. Learn about door contacts.
Where Can I Buy Alarm Contacts?
Alarm Grid offers all of the door and window contacts you need for your alarm system. We offer door and window sensors of all types. Learn about our alarm contacts.
How Does a Door Contact Sensor Work?
The typical door contact consists of a sensor and a magnet. When the door opens, the magnet separates from the sensor. The sensor then alerts the panel. Learn about door contacts.
What is a Door Contact Sensor
Alarm systems use door contact sensors to know whether or not doors are opened or closed. This is important for monitoring building activity. Learn about door contacts.
How Do I Install a Wireless Door Sensor on a Sliding Patio Door?
On a sliding door, the magnet and sensor should be aligned so that they separate whenever the door is slid opened. Learn how to install a door sensor on a sliding door.
What is a Magnetic Contact?
Most door and window contacts operate using an internal reed switch in conjunction with a magnet. Learn about door and window sensors and how they operate.
Can I Use Door/Window Sensors on a Qolsys IQ Panel 2?
The standard daughterboard for the IQ Panel 2 will accept sensors that communicate at the 319.5 MHz frequency. This includes any door and window sensors. If a different daughterboard is added, the sensors will need to operate at a different frequency. Learn more about the Qolsys IQ Panel 2.
Alarm Grid sells all the door contacts you need for your alarm system. We offer hardwired and wireless contacts in surface-mount and recessed varieties. Learn about door contacts.
Added:
Will Any Magnet Work w/ a Door or Window Alarm Sensor?
A magnet's job for a contact sensor is to keep the reed switch closed. In theory, this can be done by any magnet. But it may not be practical. Learn about door and window sensors.
Added:
Do Alarm System Door Contacts Need a Power Supply?
Door contacts operate using a built-in reed switch and magnet. No power supply is needed. But wireless contacts use power to communicate with the panel. Learn about door contacts.
Added:
Where Do I Install a Sensor Contact on a Door?
The best place to install a contact is on a door frame. The magnet should be installed on the moving part of the door, within a half-inch of the sensor. Learn about door contacts.
Added:
Where Can I Buy Alarm Contacts?
Alarm Grid offers all of the door and window contacts you need for your alarm system. We offer door and window sensors of all types. Learn about our alarm contacts.
Added:
How Does a Door Contact Sensor Work?
The typical door contact consists of a sensor and a magnet. When the door opens, the magnet separates from the sensor. The sensor then alerts the panel. Learn about door contacts.
Added:
What is a Door Contact Sensor
Alarm systems use door contact sensors to know whether or not doors are opened or closed. This is important for monitoring building activity. Learn about door contacts.
Added:
How Do I Install a Wireless Door Sensor on a Sliding Patio Door?
On a sliding door, the magnet and sensor should be aligned so that they separate whenever the door is slid opened. Learn how to install a door sensor on a sliding door.
Added:
What is a Magnetic Contact?
Most door and window contacts operate using an internal reed switch in conjunction with a magnet. Learn about door and window sensors and how they operate.
Added:
Can I Use Door/Window Sensors on a Qolsys IQ Panel 2?
The standard daughterboard for the IQ Panel 2 will accept sensors that communicate at the 319.5 MHz frequency. This includes any door and window sensors. If a different daughterboard is added, the sensors will need to operate at a different frequency. Learn more about the Qolsys IQ Panel 2.
Added: