Wired Door & Window Alarm Contacts Frequently Asked Questions

Why Does the Wired Alarm Contact on My Door Not Work?
You might experience problems with a wired door contact due to poor mounting, poor wiring, or improper programming. Learn how to troubleshoot your hardwired door contact.
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Where Should I Install a Hardwire Contact on a Vinyl Slider Window?
You can install wired contacts on almost any window. Just mount the sensor on the frame and the magnet on the moving part of the window. Find out where to install a wired contact.
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What Are Door Contacts?
Sensors that are used to monitor whether a door is opened or closed are often called door contacts. Learn about door contacts and how they are used with alarm systems.
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What Is the Difference Between a Door and Window "Contact" and a "Sensor"?
A door and window "contact" might also be referred to as a "sensor". The two terms are generally used interchangeably. But "sensor" is a broader term. Learn about contact sensors.
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How Do I Replace Wired Door Alarm Sensors?
If you are replacing a wired door alarm sensor, you can just disconnect the wires from the old sensor and connect them to the new one. Learn how to replace wired door sensors.
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How Do I Remove an Alarm Sensor from My Door?
Alarm door sensors are very easy to remove. You just have to delete the zone programming, disconnect the wires and remove the sensor and magnet. Learn to remove door sensors.
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How Do I Remove an Alarm Sensor from a Door or Window?
Many users will want to remove an alarm sensor from a door or window to use it in a new location. This process is fairly easy. Find out how to remove door and window contacts.
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Are Door and Window Contacts Tamper Proof?
Most door and window contacts have protections put in place to prevent intruders or other people from tampering with them. Find out how door and window contacts are tamper proof.
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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.
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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.
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