Alarm Sensor Magnets

Alarm sensor magnets represent a necessary component of any surface-mounted or recess-mounted door and window contact sensor. The magnet should be in very close proximity to the sensor when the door or window is closed. Replacement magnets for door and window sensors are available. Buy magnets here.
Honeywell 5899 - Magnet for 5816 Wireless Door Sensor and Window Sensor
Honeywell 5899
Magnet for 5816 Wireless Door Sensor and Window Sensor
List Price: $5.00
Our Price: $3.99
Honeywell PROBTM - Rare Earth Button Type Magnet
Honeywell PROBTM
Rare Earth Button Type Magnet
List Price: $4.00
Our Price: $1.99
Honeywell 5899B - Small Magnet for Wireless Door and Window Contacts
Honeywell 5899B
Small Magnet for Wireless Door and Window Contacts
List Price: $5.00
Our Price: $3.99
Qolsys QR0030-840
Replacement Magnet for Qolsys Door/Window Contacts
List Price: $4.00
Our Price: $2.99
GRI M-4400
Industrial Aluminum Magnet 2.5”L x 0.75"W x 0.5"H
List Price:
Our Price: $12.99
Honeywell 7945WH-M - White Magnet for XTP 7945 Surface Mount Magnetic Contact with Leads
Honeywell 7945WH-M
White Magnet for XTP 7945 Surface Mount Magnetic Contact with Leads
List Price: $6.00
Our Price: $4.99
Honeywell 943WG-M - Magnet for 943WG Miniature Magnetic Contact
Honeywell 943WG-M
Magnet for 943WG Miniature Magnetic Contact
List Price: $4.00
Our Price: $2.99
GRI M-110
Surface-Mount Magnet 1.5"L x 5/16"W x 3/8"D
List Price:
Our Price: $1.99
GRI M-500
Surface-Mount Magnet 7/8"L x 1/4"W x 1/4"D
List Price:
Our Price: $1.99
GRI M-7
Surface-Mount Magnet 1"L x 0.25"W x 0.25"D
List Price:
Our Price: $1.99
GRI M-180
Steel Door Recessed Magnet 3/4" Diameter
List Price:
Our Price: $2.99
GRI MM-10
Rare Earth Magnet 1/4" Diameter, 3/4" Long
List Price:
Our Price: $1.99

Alarm sensor magnets are something that are used with nearly every security system. Door and window contact sensors represent the most popular type of security sensors available, and the vast majority of these sensors make use of magnets. There are all types of alarm sensor magnets, ranging from standard surface-mounted magnets, outdoor sensor magnets, and recessed magnets. These magnets also come in different sizes, and it is important that you find magnets that match your sensors in terms of size. Depending on the sensor, it is often possible to find a magnet that matches aesthetically as well. If not, then most magnets can be painted to better match the sensor.

When you consider door and window contact sensors, magnets represent an important component of their operation. When the door or window is closed, the sensor should be very close to, or in direct contact with, the magnet. Most contact sensors will not function properly if they are further than half an inch away from the magnet when the door or window is closed. Check the specifications for your sensor to find out the exact distance. It is the job of the magnet to keep the sensor's internal reed switch in a closed position when the door or window is closed. This is the only way for the sensor to know that the door or window has not been opened. Once you open the door or window, the magnet will become separated from the sensor, thereby releasing the reed switch inside the sensor. The sensor will then know to alert the system to let it know that the door or window has been opened.

In most cases, the magnet is placed on the moving portion of the door or window, while the sensor itself is on the stationary door or window frame. This is the best practice, as you do not want the sensor constantly moving around. The sensor considerably more expensive than the magnet, and it is less likely to be damaged by remaining in a stationary, non-moving position. As you can see from our offerings, there are plenty of alarm sensor magnets available, and they are very easy to replace. If you find that your magnet has become damaged, you can order a replacement and continue to use your existing sensor. This is usually much less expensive than replacing the entire sensor. While there isn't always a magnet that will match your sensor perfectly in terms of aesthetics, there is almost always a magnet available that will work with the existing sensor and get the job done in ensuring that the sensor continues to function properly. Check our compatible products lists for the best recommendation based on the sensor you are using.

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