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$11.66
7939WG-WH - Ademco Surface Mount Contacts (White)
Amazon.com
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7939WG-WH - Ademco Surface Mount Contacts (White)
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GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
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GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
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Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
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Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
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Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
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Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
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5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, For DC 5V 12V 24V
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Bnafes Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs
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Seco-Larm SM-226L-3Q Overhead Door Magnetic Contact - 2-3/4 (70Mm) Gap, Open/Closed Loop
BSA Security Integrators
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Seco-Larm SM-226L-3Q Overhead Door Magnetic Contact - 2-3/4 (70Mm) Gap, Open/Closed Loop
BSA Security Integrators
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Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
Amazon.com
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Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
Amazon.com
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Magnetic Reed Switch MC-32 NC/NO Surface Mount Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm
Amazon.com
17
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Magnetic Reed Switch MC-32 NC/NO Surface Mount Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm
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Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Contact Sensor Alarm Brown - (10 Sets)
Amazon.com
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Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Contact Sensor Alarm Brown - (10 Sets)
Amazon.com
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$71.79
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
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2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
147
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Honeywell 7939WG-WH Magnetic Contact, White
JMAC
347
$7.00
Honeywell 7939WG-WH Magnetic Contact, White
JMAC
347
$23.70
Seco-Larm SM-226R-3Q Round Overhead Door Contact | Alarm Switches
Newark
$23.70
Seco-Larm SM-226R-3Q Round Overhead Door Contact | Alarm Switches
Newark
$9.99
Magnetic Reed Switch RC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Magnetic Reed
Amazon.com
17
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Magnetic Reed Switch RC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Magnetic Reed
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2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch, DC 5Vto12v
Amazon.com
579
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2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch, DC 5Vto12v
Amazon.com
579
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$22.31
10X N.C. Recessed Wired Security Contact Sensor Alarm Magnetic Reed
eBay
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$22.31
10X N.C. Recessed Wired Security Contact Sensor Alarm Magnetic Reed
eBay
$33.99
RC-36 NC/NO Magnetic Reed Switch Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
4
$33.99
RC-36 NC/NO Magnetic Reed Switch Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
4
$4.70
Seco-Larm SM-4105-LQ/W Steel Door Recessed Contact With Leads N.C.1" Gap (White) | Alarm Switches
Newark
$4.70
Seco-Larm SM-4105-LQ/W Steel Door Recessed Contact With Leads N.C.1" Gap (White) | Alarm Switches
Newark
$26.75
5 Door & Window Alarm Contact Switch Normally Closed, Wired Surface Mount-White
eBay
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5 Door & Window Alarm Contact Switch Normally Closed, Wired Surface Mount-White
eBay
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1 Magnetic Door Window Contact Reed Switch Alarm Security Honeywell For DSC
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Wired Alarm Heavy Duty Garage Door Magnetic Contacts With Adjustable Bracket
Amazon.com
$9.99
Wired Alarm Heavy Duty Garage Door Magnetic Contacts With Adjustable Bracket
Amazon.com
$2.90
Seco-Larm SM-4301-TQW Plunger Type Contact | Alarm Switches
Newark
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Seco-Larm SM-4301-TQW Plunger Type Contact | Alarm Switches
Newark
$15.81
$18.60
Door Window No/Nc Recessed Security Contact Sensor Alarm Magnetic Reed
eBay
1
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Door Window No/Nc Recessed Security Contact Sensor Alarm Magnetic Reed
eBay
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Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch
eBay
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Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch
eBay
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5 Dark Brown Magnetic Door Window Contact Reed Switch Alarm Security Napco
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5 Dark Brown Magnetic Door Window Contact Reed Switch Alarm Security Napco
eBay
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Uxcell 5Pcs RC-35 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
$10.99
Uxcell 5Pcs RC-35 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
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5 Door & Window Alarm Contact Switch Normally Closed, Surface Mount--White
eBay
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5 Door & Window Alarm Contact Switch Normally Closed, Surface Mount--White
eBay
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5 Door & Window Alarm Contact Switch Normally Closed, Wired Surface Mount-Brown
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5 Door & Window Alarm Contact Switch Normally Closed, Wired Surface Mount-Brown
eBay
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Bnafes 4Sets MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch White
Amazon.com
10
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Bnafes 4Sets MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch White
Amazon.com
10
$26.95
10 Pack White Door Window Security Alarm Contact Surface Reed Home Switch Sensor
eBay
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10 Pack White Door Window Security Alarm Contact Surface Reed Home Switch Sensor
eBay
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$15.50
Honeywell Ademco 7939WG-GY Surface Mount Contact Grey 7939WGGY
Amazon.com
2
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$15.50
Honeywell Ademco 7939WG-GY Surface Mount Contact Grey 7939WGGY
Amazon.com
2
$7.93
Uxcell RC-36 NO Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
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Uxcell RC-36 NO Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
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Uxcell Home Wired Alarm Security Magnetic Door Contact Reed Sensor Switch White 2 Sets | Harfington
harfington
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Uxcell Home Wired Alarm Security Magnetic Door Contact Reed Sensor Switch White 2 Sets | Harfington
harfington
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Uxcell RC-33 NO Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
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Uxcell RC-33 NO Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
$6.18
Uxcell RC-36 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Brown | Harfington
harfington
10
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Uxcell RC-36 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Brown | Harfington
harfington
10
$147.00
UTC Interlogix (Formerly GE Security/Sentrol) 1076H-N Recessed Steel Door Contact, Wire Leads, 1" Diameter, 1/2" Gap, SPDT, High Secuirty, White
JMAC
$147.00
UTC Interlogix (Formerly GE Security/Sentrol) 1076H-N Recessed Steel Door Contact, Wire Leads, 1" Diameter, 1/2" Gap, SPDT, High Secuirty, White
JMAC
What is a Door Alarm Sensor or Door Contact?
What is a Door Alarm Sensor or Door Contact?
Mar 18, 2021
midches.com
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Shop security alarm contacts

Sponsored
About our ads
$11.66
7939WG-WH - Ademco Surface Mount Contacts (White)
Amazon.com
347
$11.66
7939WG-WH - Ademco Surface Mount Contacts (White)
Amazon.com
347
$16.99
GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
Amazon.com
$16.99
GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
Amazon.com
$19.79
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
Amazon.com
144
$19.79
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
Amazon.com
144
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
45
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
45
$17.99
5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, For DC 5V 12V 24V
Amazon.com
246
$17.99
5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, For DC 5V 12V 24V
Amazon.com
246
$7.89
Bnafes Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs
Amazon.com
50
$7.89
Bnafes Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs
Amazon.com
50
$21.74
$29.99
Seco-Larm SM-226L-3Q Overhead Door Magnetic Contact - 2-3/4 (70Mm) Gap, Open/Closed Loop
BSA Security Integrators
5
27% off
$21.74
$29.99
Seco-Larm SM-226L-3Q Overhead Door Magnetic Contact - 2-3/4 (70Mm) Gap, Open/Closed Loop
BSA Security Integrators
5
$29.99
Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
Amazon.com
1K+
$29.99
Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
Amazon.com
1K+
$15.99
Magnetic Reed Switch MC-32 NC/NO Surface Mount Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm
Amazon.com
17
$15.99
Magnetic Reed Switch MC-32 NC/NO Surface Mount Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm
Amazon.com
17
$12.99
Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Contact Sensor Alarm Brown - (10 Sets)
Amazon.com
$12.99
Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Contact Sensor Alarm Brown - (10 Sets)
Amazon.com
$54.95
$71.79
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
147
Free shipping
23% off
$54.95
$71.79
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
147
$7.00
Honeywell 7939WG-WH Magnetic Contact, White
JMAC
347
$7.00
Honeywell 7939WG-WH Magnetic Contact, White
JMAC
347
$23.70
Seco-Larm SM-226R-3Q Round Overhead Door Contact | Alarm Switches
Newark
$23.70
Seco-Larm SM-226R-3Q Round Overhead Door Contact | Alarm Switches
Newark
$9.99
Magnetic Reed Switch RC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Magnetic Reed
Amazon.com
17
$9.99
Magnetic Reed Switch RC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Magnetic Reed
Amazon.com
17
$9.99
2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch, DC 5Vto12v
Amazon.com
579
$9.99
2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch, DC 5Vto12v
Amazon.com
579
$19.63
$22.31
10X N.C. Recessed Wired Security Contact Sensor Alarm Magnetic Reed
eBay
12% off
$19.63
$22.31
10X N.C. Recessed Wired Security Contact Sensor Alarm Magnetic Reed
eBay
$33.99
RC-36 NC/NO Magnetic Reed Switch Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
4
$33.99
RC-36 NC/NO Magnetic Reed Switch Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
4
$4.70
Seco-Larm SM-4105-LQ/W Steel Door Recessed Contact With Leads N.C.1" Gap (White) | Alarm Switches
Newark
$4.70
Seco-Larm SM-4105-LQ/W Steel Door Recessed Contact With Leads N.C.1" Gap (White) | Alarm Switches
Newark

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