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Security
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Normally Open
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Security Sensors
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Security System Sensors
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Security
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Normally Open
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Security System Sensors
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Door and Window Magnetic Contact Switch, Normally Open
Here is the most basic sensor of any alarm system. These contact switches are ideal for doors, windows, and sliding doors. These magnetic contact switches are for open circuit systems.
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Part #
7040
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Sale $5.98
$5.99
44 customer ratings
Surface Mount Magnetic Contact Switch, Normally Open (10-Pack)
Protect your home by enhancing your security system with these magnetic contact sensors for normally open applications.
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Part #
7040-10
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$54.99
1 customer rating
Momentary SPST Tubular Key Lock
Commonly used for momentary arm/disarm alarm inputs or other applications requiring high-security momentary on, this two-terminal lock is maintained in the off position, springing back from the on position.
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Part #
70410
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Sale $8.94
$13.99
3 customer ratings
Normally Open Tamper Switch
This tamper switch can be used with any security system with normally closed circuits, and its small size makes it easy to hide and install.
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Part #
7041
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Sale $1.42
$1.99
6 customer ratings
Stainless Steel Turn-To-Open Keylock Switch
Keyed switch can turn devices such as door locks and fireplace On or Off (to open or close) via contact closure. Switch can be left On or Off and the key removed from either position.
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Part #
70420
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Sale $36.97
$36.99
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