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$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
$15.69
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
18
$15.69
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
18
$125.26
Security Door Controls Door Position Sensor (DPS) Concealed Magnetic Contact DPDT Double Pole Double Throw MC-4M-2-U
DkHardware.com
$125.26
Security Door Controls Door Position Sensor (DPS) Concealed Magnetic Contact DPDT Double Pole Double Throw MC-4M-2-U
DkHardware.com
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
29
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
29
$19.26
$22.66
3Pcs Wired Door Contact Sensor No Magnetic Reed Switch 30cm Cable
eBay
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3Pcs Wired Door Contact Sensor No Magnetic Reed Switch 30cm Cable
eBay
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$32.99
Boltic 687MDCSWITCH Magnetic Door Contact Switch
WebstaurantStore
$32.99
Boltic 687MDCSWITCH Magnetic Door Contact Switch
WebstaurantStore
$21.74
$29.99
Seco-Larm SM-226L-3Q Overhead Door Magnetic Contact - 2-3/4 (70Mm) Gap, Open/Closed Loop
BSA Security Integrators
7
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
7
$17.39
Uxcell Rolling Door Contact Magnetic Reed Switch Alarm With 3 Wires For N.O./N.C. Applications OC-55
Amazon.com
50
$17.39
Uxcell Rolling Door Contact Magnetic Reed Switch Alarm With 3 Wires For N.O./N.C. Applications OC-55
Amazon.com
50
$17.38
$20.45
5Pcs Wired Door Contact Sensor Normally Closed Magnetic Reed Switch
eBay
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15% off
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5Pcs Wired Door Contact Sensor Normally Closed Magnetic Reed Switch
eBay
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$7.00
Honeywell 7939WG-WH Magnetic Contact, White
JMAC
349
$7.00
Honeywell 7939WG-WH Magnetic Contact, White
JMAC
349
$16.15
$18.56
5 Pcs Wired Door Contact Sensor Surface Mount Magnetic Reed Switch
eBay
Free shipping
12% off
$16.15
$18.56
5 Pcs Wired Door Contact Sensor Surface Mount Magnetic Reed Switch
eBay
Free shipping
$39.97
Smart Door & Window Sensor For Home Security Magnetic Contact Detector, No Gateway Required Smart Door & Window Sensor For Home Security Magnetic Cont
Inspire Uplift
$39.97
Smart Door & Window Sensor For Home Security Magnetic Contact Detector, No Gateway Required Smart Door & Window Sensor For Home Security Magnetic Cont
Inspire Uplift
$54.85
SDC DPS Monitoring With Recessed Magnetic Contact SPDT MC-4
DkHardware.com
$54.85
SDC DPS Monitoring With Recessed Magnetic Contact SPDT MC-4
DkHardware.com
$15.33
$18.04
Rc36 Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch
eBay
Free shipping
15% off
$15.33
$18.04
Rc36 Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch
eBay
Free shipping
$21.42
$23.03
5 X Wired Door Contact Sensor No Surface Mount Magnetic Reed Switch
eBay
$21.42
$23.03
5 X Wired Door Contact Sensor No Surface Mount Magnetic Reed Switch
eBay
$119.60
Ad Hocs Electronics | E9T-MDCCP | Window / Door Sensor With Magnet Contact 902 MHZ | Network And Wireless - Controls
Kele
$119.60
Ad Hocs Electronics | E9T-MDCCP | Window / Door Sensor With Magnet Contact 902 MHZ | Network And Wireless - Controls
Kele
$14.88
$17.50
2Pcs Rc-33 Recessed Wired Contact Sensor Alarm Magnetic Reed Switch
eBay
14% off
$14.88
$17.50
2Pcs Rc-33 Recessed Wired Contact Sensor Alarm Magnetic Reed Switch
eBay
$13.71
$16.13
Mc-38 Surface Mount Wired Door Sensors Alarm Magnetic Reed Switch
eBay
Free shipping
15% off
$13.71
$16.13
Mc-38 Surface Mount Wired Door Sensors Alarm Magnetic Reed Switch
eBay
Free shipping
$49.35
Hager Concealed Door Status Sensor (Magnetic Contact)
Cape Cod Brass | Online Decorative Showroom
$49.35
Hager Concealed Door Status Sensor (Magnetic Contact)
Cape Cod Brass | Online Decorative Showroom
$33.46
Zonadah Xl 32 Magnetic Door Contact Sensor No Magnetic Switch Wired Security Window Door Contact Sensor Alarm Magnetic D
Everymarket INC
$33.46
Zonadah Xl 32 Magnetic Door Contact Sensor No Magnetic Switch Wired Security Window Door Contact Sensor Alarm Magnetic D
Everymarket INC
$188.68
1PC Magnetic Proximity Sensor Door Magnet Induction Switch
eBay
Free shipping
$188.68
1PC Magnetic Proximity Sensor Door Magnet Induction Switch
eBay
Free shipping
$18.23
Surface Mounted Wired Magnetic Metal Door Window Sensor Detector Contact Switch'
eBay
$18.23
Surface Mounted Wired Magnetic Metal Door Window Sensor Detector Contact Switch'
eBay
$192.28
1PC ZPSD02 Door Sensor Magnetic Proximity Detector
eBay
$192.28
1PC ZPSD02 Door Sensor Magnetic Proximity Detector
eBay
$45.00
SDC MC-4 Recessed Magnetic Door Position Sensor 3/4 SPDT 30VDC
B and H Depot
$45.00
SDC MC-4 Recessed Magnetic Door Position Sensor 3/4 SPDT 30VDC
B and H Depot
$30.50
Tiardey Magnetic Reed Switch Surface Mount Wired Nc Door Sensor Alarm Magnetic Reed Switch Door Contact Sensor Alarm For
Everymarket INC
$30.50
Tiardey Magnetic Reed Switch Surface Mount Wired Nc Door Sensor Alarm Magnetic Reed Switch Door Contact Sensor Alarm For
Everymarket INC
$27.37
$30.41
Garage Door Sensor, Wired Magnetic Contacts Switch With Adjustable
eBay
$27.37
$30.41
Garage Door Sensor, Wired Magnetic Contacts Switch With Adjustable
eBay
$33.52
Zonadah Magnetic Reed Switch Safe Normally Open Closed Door Window Contact Sensor Alarm Reed Switch Magnetic Contact Swi
Everymarket INC
$33.52
Zonadah Magnetic Reed Switch Safe Normally Open Closed Door Window Contact Sensor Alarm Reed Switch Magnetic Contact Swi
Everymarket INC
$16.88
Gebildet Home Security Wired Rolling Door Contact 0 100 V/0.5 Amp Magnetic Reed Switch Alarm Sensor Magnetic Switch For
Everymarket INC
$16.88
Gebildet Home Security Wired Rolling Door Contact 0 100 V/0.5 Amp Magnetic Reed Switch Alarm Sensor Magnetic Switch For
Everymarket INC
$30.50
Le Sircut Lems 101 5, 5Pcs Recessed Wired Security Door Contact Sensor Alarm Magnetic Reed Switch, Magnetic Door Sensor,
Everymarket INC
$30.50
Le Sircut Lems 101 5, 5Pcs Recessed Wired Security Door Contact Sensor Alarm Magnetic Reed Switch, Magnetic Door Sensor,
Everymarket INC
$35.42
Resideo Braukmann, Overhead Door Magnetic Contact Sensor, Unspecified Size, Unspecified Color, SPDT Switch Form C, Reliable Security
Voomi Supply
$35.42
Resideo Braukmann, Overhead Door Magnetic Contact Sensor, Unspecified Size, Unspecified Color, SPDT Switch Form C, Reliable Security
Voomi Supply
$25.75
Honeywell Ademco 958 Overhead Door Magnetic Contact
JMAC
199
$25.75
Honeywell Ademco 958 Overhead Door Magnetic Contact
JMAC
199
$38.78
Gototop Magnetic Detecting Contacts Door Window Magnetic Contact Wired Sensor Detector Switch For Home Garage Alarm Wind
Everymarket INC
$38.78
Gototop Magnetic Detecting Contacts Door Window Magnetic Contact Wired Sensor Detector Switch For Home Garage Alarm Wind
Everymarket INC
$44.82
Zonadah Nc Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Magnetic Detector Switch Reed D
Everymarket INC
$44.82
Zonadah Nc Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Magnetic Detector Switch Reed D
Everymarket INC
$22.00
Le Sircut Magnet Door Contact, 5Pcs Recessed Wired Security Door Contact Sensor Alarm Magnetic Reed Switch, Magnetic Doo
Everymarket INC
$22.00
Le Sircut Magnet Door Contact, 5Pcs Recessed Wired Security Door Contact Sensor Alarm Magnetic Reed Switch, Magnetic Doo
Everymarket INC
$23.20
Le Sircut Magnet Door Contact, 5Pcs Recessed Wired Security Door Contact Sensor Alarm Magnetic Reed Switch, Magnetic Doo
Everymarket INC
$23.20
Le Sircut Magnet Door Contact, 5Pcs Recessed Wired Security Door Contact Sensor Alarm Magnetic Reed Switch, Magnetic Doo
Everymarket INC
$5.85
Seco-Larm 3/8" Diameter Magnetic Contact 1" Gap NC White SM-207-5LQ/W
DkHardware.com
$5.85
Seco-Larm 3/8" Diameter Magnetic Contact 1" Gap NC White SM-207-5LQ/W
DkHardware.com
Arduino Tutorial: Magnetic contact switch (door sensor)
0:27
Arduino Tutorial: Magnetic contact switch (door sensor)
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YouTubeArdumotive - Arduino RPi Projects & Unboxing
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Magnetic Contact Switch Sensor and Arduino #arduinoproject
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Sobinco magnetic window sensor - How to test? Magnetkontakt Fenster testen. Method 1
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Shop magnetic contact sensor

Sponsored
About our ads
$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
$15.69
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
18
$15.69
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
18
$125.26
Security Door Controls Door Position Sensor (DPS) Concealed Magnetic Contact DPDT Double Pole Double Throw MC-4M-2-U
DkHardware.com
$125.26
Security Door Controls Door Position Sensor (DPS) Concealed Magnetic Contact DPDT Double Pole Double Throw MC-4M-2-U
DkHardware.com
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
29
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
29
$19.26
$22.66
3Pcs Wired Door Contact Sensor No Magnetic Reed Switch 30cm Cable
eBay
Free shipping
15% off
$19.26
$22.66
3Pcs Wired Door Contact Sensor No Magnetic Reed Switch 30cm Cable
eBay
Free shipping
$32.99
Boltic 687MDCSWITCH Magnetic Door Contact Switch
WebstaurantStore
$32.99
Boltic 687MDCSWITCH Magnetic Door Contact Switch
WebstaurantStore
$21.74
$29.99
Seco-Larm SM-226L-3Q Overhead Door Magnetic Contact - 2-3/4 (70Mm) Gap, Open/Closed Loop
BSA Security Integrators
7
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
7
$17.39
Uxcell Rolling Door Contact Magnetic Reed Switch Alarm With 3 Wires For N.O./N.C. Applications OC-55
Amazon.com
50
$17.39
Uxcell Rolling Door Contact Magnetic Reed Switch Alarm With 3 Wires For N.O./N.C. Applications OC-55
Amazon.com
50
$17.38
$20.45
5Pcs Wired Door Contact Sensor Normally Closed Magnetic Reed Switch
eBay
Free shipping
15% off
$17.38
$20.45
5Pcs Wired Door Contact Sensor Normally Closed Magnetic Reed Switch
eBay
Free shipping
$7.00
Honeywell 7939WG-WH Magnetic Contact, White
JMAC
349
$7.00
Honeywell 7939WG-WH Magnetic Contact, White
JMAC
349
$16.15
$18.56
5 Pcs Wired Door Contact Sensor Surface Mount Magnetic Reed Switch
eBay
Free shipping
12% off
$16.15
$18.56
5 Pcs Wired Door Contact Sensor Surface Mount Magnetic Reed Switch
eBay
Free shipping
$39.97
Smart Door & Window Sensor For Home Security Magnetic Contact Detector, No Gateway Required Smart Door & Window Sensor For Home Security Magnetic Cont
Inspire Uplift
$39.97
Smart Door & Window Sensor For Home Security Magnetic Contact Detector, No Gateway Required Smart Door & Window Sensor For Home Security Magnetic Cont
Inspire Uplift
$54.85
SDC DPS Monitoring With Recessed Magnetic Contact SPDT MC-4
DkHardware.com
$54.85
SDC DPS Monitoring With Recessed Magnetic Contact SPDT MC-4
DkHardware.com
$15.33
$18.04
Rc36 Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch
eBay
Free shipping
15% off
$15.33
$18.04
Rc36 Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch
eBay
Free shipping
$21.42
$23.03
5 X Wired Door Contact Sensor No Surface Mount Magnetic Reed Switch
eBay
$21.42
$23.03
5 X Wired Door Contact Sensor No Surface Mount Magnetic Reed Switch
eBay
$119.60
Ad Hocs Electronics | E9T-MDCCP | Window / Door Sensor With Magnet Contact 902 MHZ | Network And Wireless - Controls
Kele
$119.60
Ad Hocs Electronics | E9T-MDCCP | Window / Door Sensor With Magnet Contact 902 MHZ | Network And Wireless - Controls
Kele
$14.88
$17.50
2Pcs Rc-33 Recessed Wired Contact Sensor Alarm Magnetic Reed Switch
eBay
14% off
$14.88
$17.50
2Pcs Rc-33 Recessed Wired Contact Sensor Alarm Magnetic Reed Switch
eBay
$13.71
$16.13
Mc-38 Surface Mount Wired Door Sensors Alarm Magnetic Reed Switch
eBay
Free shipping
15% off
$13.71
$16.13
Mc-38 Surface Mount Wired Door Sensors Alarm Magnetic Reed Switch
eBay
Free shipping