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Safety Equipment and GearAir ToolsAlarm SystemsAll Home SecurityBathroom PlumbingBreakers, Distributors, and Load CentersDimmers, Switches, and Wall PlatesDoor HardwareDoor Security HardwareDoorbellsElectrical ToolsFire SafetyFurniture HardwareGarage Door Openers and HardwareGuttering & DrainageHand ToolsHome SafetyKitchen HardwareLight BulbsMailboxes and Mailbox AccessoriesMechanics ToolsOutletsPadlocksPersonal SafetyPower ToolsSafes & LockboxesSafety DetectorsSolderingSurveillanceTestersThermostatsValves & Valve RepairWater Heaters, Pumps & Tanks
Alarm Switch(396)
Uses item details. Price when purchased online
Briidea Septic Sump Pump Alarm, 110dB Siren, LED Indicator, 10ft Float Switch, Indoor/Outdoor, with Test Button & AC Light From $89.99

Sponsored
From$8999
Briidea Septic Sump Pump Alarm, 110dB Siren, LED Indicator, 10ft Float Switch, Indoor/Outdoor, with Test Button & AC Light
15 out of 5 Stars. 1 reviews
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FOUR E's Scientific Sump Alarm, High Water Alarm for Sump Pump & Septic Water, Weatherproof 110dB Audible Alarm with Float Switch for Indoor Use $42.99

Sponsored
$4299
current price $42.99FOUR E's Scientific Sump Alarm, High Water Alarm for Sump Pump & Septic Water, Weatherproof 110dB Audible Alarm with Float Switch for Indoor Use
Akicon Humidity Sensor Switch for Bathroom Fan, Ventilation, LED Night Light, Air Moisture Control, Timer, UL Listed, White $39.59 Was $43.99
Sponsored
Now$3959
current price Now $39.59, Was $43.99$43.99
Akicon Humidity Sensor Switch for Bathroom Fan, Ventilation, LED Night Light, Air Moisture Control, Timer, UL Listed, White
15 out of 5 Stars. 1 reviews
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Zuomeng High Water Alarm for Sump Pump, Flashing Light & 110 dB Alarm, IP67 Casing, Connects to Submersible Pump $75.99

Sponsored
$7599
current price $75.99Zuomeng High Water Alarm for Sump Pump, Flashing Light & 110 dB Alarm, IP67 Casing, Connects to Submersible Pump
Magnetic Sensor Home Door Window Entry Warning Alarm Switch $5.09 Was $6.10

Now$509
current price Now $5.09, Was $6.10$6.10
Magnetic Sensor Home Door Window Entry Warning Alarm Switch
4X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $8.41

$841
current price $8.414X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
AURARMLET White Manual Fire Alarm Reset Switch for Cars, Quick Emergency Call Button, and Design $8.07

$807
current price $8.07AURARMLET White Manual Fire Alarm Reset Switch for Cars, Quick Emergency Call Button, and Design
20X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $22.13

$2213
current price $22.1320X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
23 out of 5 Stars. 2 reviews
10 Pack White 3/8" Plunger Contact Door Window Cabinet Alarm Switch Adjustable $32.95

$3295
current price $32.9510 Pack White 3/8" Plunger Contact Door Window Cabinet Alarm Switch Adjustable
5X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $7.73 Was $9.49

Now$773
current price Now $7.73, Was $9.49$9.49
5X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Briidea Power Return Alarm, Utility Power Back Alert for Generator, Siren & LED Indicator $29.99

Sponsored
$2999
current price $29.99Briidea Power Return Alarm, Utility Power Back Alert for Generator, Siren & LED Indicator
65 out of 5 Stars. 6 reviews
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VEVOR Door Chime, DC 12V, Wireless Door Open Contact Sensor Alarm Chime with 656 ft Range, Remote Control with App, Doors Ringer Alert for Business, Store, Home, Office (6 Sensors + 1 Receiver) $56.91

Sponsored
$5691
current price $56.91VEVOR Door Chime, DC 12V, Wireless Door Open Contact Sensor Alarm Chime with 656 ft Range, Remote Control with App, Doors Ringer Alert for Business, Store, Home, Office (6 Sensors + 1 Receiver)
33.7 out of 5 Stars. 3 reviews
Velleman HAA25 Low Cost Reed Switch for Alarm, 0.5" Height, 0.5" Wide, 2.6" Length, ABS

Velleman HAA25 Low Cost Reed Switch for Alarm, 0.5" Height, 0.5" Wide, 2.6" Length, ABS
KITPIPI Outdoor LED Security Light with 180° PIR Motion Sensor From $7.21
From$721
KITPIPI Outdoor LED Security Light with 180° PIR Motion Sensor
44 out of 5 Stars. 4 reviews
HomeZone Wi-Fi Smart Keypad Controlled Window or Door Alarm with Magnetic Switch, Compatible with Alexa and Google Assistant, White, 4 oz $14.97

$1497
current price $14.97HomeZone Wi-Fi Smart Keypad Controlled Window or Door Alarm with Magnetic Switch, Compatible with Alexa and Google Assistant, White, 4 oz
663.6 out of 5 Stars. 66 reviews
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10Sets Wired Alarm Door Sensor Door Window Reed Switch Sensor $20.46

$2046
current price $20.4610Sets Wired Alarm Door Sensor Door Window Reed Switch Sensor
Reduced price 5C-55ZL Heavy Duty Alarm Switch Sensor, Normally Closed 3-Wire with Strong Attachment Force Garage Door Contact, 50 mm Sensing, Metal Safety Shutter Sensor with Bracket $17.99 Was $22.68

Now$1799
current price Now $17.99, Was $22.68$22.68
5C-55ZL Heavy Duty Alarm Switch Sensor, Normally Closed 3-Wire with Strong Attachment Force Garage Door Contact, 50 mm Sensing, Metal Safety Shutter Sensor with Bracket
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2 Pack Overhead Door Floor Garage Shutter Contact Sensor Security Alarm Switch $30.95

$3095
current price $30.952 Pack Overhead Door Floor Garage Shutter Contact Sensor Security Alarm Switch
M Buder GSM Gate Opener 4G Remote Control Relay Switch Mobile Phone Access Controller APP WEB Temp Humidity Alarm SMS Power Failure 110-240V 7.87 inches / 20 cm $65.67

$6567
current price $65.67M Buder GSM Gate Opener 4G Remote Control Relay Switch Mobile Phone Access Controller APP WEB Temp Humidity Alarm SMS Power Failure 110-240V 7.87 inches / 20 cm
8X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $8.97

$897
current price $8.978X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Sensor Switch CMR 9 Standard Range, Passive Infrared Ceiling Mount Occupancy Sensor, White From $60.23

Sponsored
From$6023
Sensor Switch CMR 9 Standard Range, Passive Infrared Ceiling Mount Occupancy Sensor, White
144.9 out of 5 Stars. 14 reviews
Uxcell Wired Door Contact Sensor N.O. Surface Mount Magnetic Reed Switch Black $7.88

Sponsored
$788
current price $7.88Uxcell Wired Door Contact Sensor N.O. Surface Mount Magnetic Reed Switch Black
10X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $14.42

$1442
current price $14.4210X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Alarm Controls NTB-1 Battery Operated No Touch Sensor, Single Gang $123.17

$12317
current price $123.17Alarm Controls NTB-1 Battery Operated No Touch Sensor, Single Gang
Yajisi 4 Channel 4G GSM Remote Control Relay Switch, Intelligent APP/WEB/SMS Alarm Controller for Home Temperature, Humidity, and Power Failure Monitoring, 100-240V EU Plug $80.97

$8097
current price $80.97Yajisi 4 Channel 4G GSM Remote Control Relay Switch, Intelligent APP/WEB/SMS Alarm Controller for Home Temperature, Humidity, and Power Failure Monitoring, 100-240V EU Plug
CRESTIN- 1 Magnetic Door Window Contact Reed Switch Alarm Security Honeywell For Dsc $53.02

$5302
current price $53.02CRESTIN- 1 Magnetic Door Window Contact Reed Switch Alarm Security Honeywell For Dsc
Magnetic Door Contact Reed Switch Security Alarm Set for Door Window $10.03

$1003
current price $10.03Magnetic Door Contact Reed Switch Security Alarm Set for Door Window
Tuya ZigBee 3.0 Smart Light Switch with 6M Radar Human Motion Detection Alarm Sensor No/Need Neutral Wire Switch Black $19.10

$1910
current price $19.10Tuya ZigBee 3.0 Smart Light Switch with 6M Radar Human Motion Detection Alarm Sensor No/Need Neutral Wire Switch Black
detex corporation emergency exit alarm magnetic switch ms-1039s $97.48

$9748
current price $97.48detex corporation emergency exit alarm magnetic switch ms-1039s
RC-33 NO Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch White $9.99

$999
current price $9.99RC-33 NO Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch White
Door Alarm with Remote, GreenCycle 108dB Loud Door and Window Alarms for Pool, Anti-Theft Door Alarms for Kids Safety Home Store Garage Apartment Business Security IP66 Waterproof Indoor/Outdoor $22.99

Sponsored
$2299
current price $22.99Door Alarm with Remote, GreenCycle 108dB Loud Door and Window Alarms for Pool, Anti-Theft Door Alarms for Kids Safety Home Store Garage Apartment Business Security IP66 Waterproof Indoor/Outdoor
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TOPGREENER PIR Passive Infrared Motion Sensor Switch, Ambient Light Level Detector, No Neutral Required, 5A, 1500W, Occupancy Vacancy Modes, Ground Wire Required, Single Pole, TDOS5-JM, Black From $19.99

Sponsored
From$1999
TOPGREENER PIR Passive Infrared Motion Sensor Switch, Ambient Light Level Detector, No Neutral Required, 5A, 1500W, Occupancy Vacancy Modes, Ground Wire Required, Single Pole, TDOS5-JM, Black
43 out of 5 Stars. 4 reviews
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Riousery 433MHz DC 12V 4-Channel Wireless Remote Control Relay Switch Kit with One Transmitter and One Receiver for Smart Home Automation Doors Windows Alarm Systems $14.44

$1444
current price $14.44Riousery 433MHz DC 12V 4-Channel Wireless Remote Control Relay Switch Kit with One Transmitter and One Receiver for Smart Home Automation Doors Windows Alarm Systems
10 pk Recessed White Door Window Security Alarm Switch Reed Contact Magnet 3/8" $19.95

$1995
current price $19.9510 pk Recessed White Door Window Security Alarm Switch Reed Contact Magnet 3/8"
2X Magnetic Sensor Home Door Window Entry Warning Alarm Switch,2 x Magnetic Door Sensor (2 parts) 8 x Screw Nail,White $7.39

$739
current price $7.392X Magnetic Sensor Home Door Window Entry Warning Alarm Switch,2 x Magnetic Door Sensor (2 parts) 8 x Screw Nail,White
Pentair ESO2 Shut-off Switch with Alarm $349.99

$34999
current price $349.99Pentair ESO2 Shut-off Switch with Alarm
6X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $8.73

$873
current price $8.736X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
15 out of 5 Stars. 1 reviews
Giles 20002 Switch; Ansul; Shutdown/Alarm; $210.86

$21086
current price $210.86Giles 20002 Switch; Ansul; Shutdown/Alarm;
10/pk Brown 3/8" Recessed Wired Security Alarm Door Window Switch Contact Magnet $27.95

$2795
current price $27.9510/pk Brown 3/8" Recessed Wired Security Alarm Door Window Switch Contact Magnet
4X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $9.09

$909
current price $9.094X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
WRISTBIQUE Emergency Fire Reset with Alarm Call Button for Quick Response in Vehicles and Buildings Safety $8.16

$816
current price $8.16WRISTBIQUE Emergency Fire Reset with Alarm Call Button for Quick Response in Vehicles and Buildings Safety
Alarm Controls - TS-2 - Alarm Controls TS-2 Push Button $62.49

$6249
current price $62.49Alarm Controls - TS-2 - Alarm Controls TS-2 Push Button
FRCOLOR 1 Set Emergency Alarm Security Key On Off Switch Emergency Stop Button Emergency Cut-Off Button Red Button Box for Fire and Security $6.60 Was $8.45

Now$660
current price Now $6.60, Was $8.45$8.45
FRCOLOR 1 Set Emergency Alarm Security Key On Off Switch Emergency Stop Button Emergency Cut-Off Button Red Button Box for Fire and Security
Fire Emergency Reset Switch Fire Alarm Switch Key Reset Button Access Control Manual Fire Alarm Activation Button,1 x Reset Switch,Green $11.89

$1189
current price $11.89Fire Emergency Reset Switch Fire Alarm Switch Key Reset Button Access Control Manual Fire Alarm Activation Button,1 x Reset Switch,Green
Alarm Controls PBL-1 PBL Series Latching Push Button Panic Station with N/O Pair and N/C Pair, Single Gang, Stainless Steel $172.48

$17248
current price $172.48Alarm Controls PBL-1 PBL Series Latching Push Button Panic Station with N/O Pair and N/C Pair, Single Gang, Stainless Steel
10 pk 3/8" Recessed Door Window Security Alarm Switch Reed Contact Magnet Brown $25.95

$2595
current price $25.9510 pk 3/8" Recessed Door Window Security Alarm Switch Reed Contact Magnet Brown
Outdoor 12V DC Automatic Infrared PIR Motion Sensor Switch for LED Light, Black $9.91

$991
current price $9.91Outdoor 12V DC Automatic Infrared PIR Motion Sensor Switch for LED Light, Black
Heavy Duty Garage Door Security Alarm Switch Contact Sensor Industrial DSC Ademco $19.95

$1995
current price $19.95Heavy Duty Garage Door Security Alarm Switch Contact Sensor Industrial DSC Ademco
Riousery 2-Channel Wireless Remote Control Electrical System Relay Switch Module DC 12V Anti-Theft Alarm Receiver with Built-In Battery for Home Garage Roller Doors Windows Motorcycles 50m Range $12.82

$1282
current price $12.82Riousery 2-Channel Wireless Remote Control Electrical System Relay Switch Module DC 12V Anti-Theft Alarm Receiver with Built-In Battery for Home Garage Roller Doors Windows Motorcycles 50m Range
10/Pk White 3/8" Recessed Wired Door Window Sensor Alarm Switch Contact Terminal $29.95

$2995
current price $29.9510/Pk White 3/8" Recessed Wired Door Window Sensor Alarm Switch Contact Terminal
15 out of 5 Stars. 1 reviews
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