Water Detectors & Alarms / Household Sensors & Alarms - Huge Savings! Save up to 17%


Huge Savings! Up to 17% off on Water Detectors & Alarms (in Household Sensors & Alarms) at American Trade System [46]. Top brands include FloodStop, Wasserstein, Guardian by Elexa, Fibaro, GROHE, Walfront, Sensaphone, Younar, WaterCop, leakSMART, WJLING, OnSite Pro, SCS Direct, La Crosse Technology, & Govee. Hurry! Limited time offers. Offers valid only while supplies last.



FloodStop FS-3/4-C Automatic Valve for Water Heater
By FloodStop
In Stock
$157.95
$138.65
You Save: 12%

mpn: FS 3/4-C-V4,

4.2 out of 5 stars with 28 reviews
FS 3/4C Floodstop With Battery Back-Up Option for Power Outage 3/4 Inch compression fitting water valve and water alarm system meets 2014 drinking water standards of USA. Battery back-up option. in case of power outage. Full port water valve unit for all 3/4 inch copper pipe applications. Floodstop responds immediately to signals from attached water sensor or extra sensors. 87 decibel alarm sounds continuously after valve closes in response to a wet water sensor. By On-Site Pro. Flood Stop Water


AC Powered Smart Wi-Fi Water Sensor, Flood and Leak Detector with 6ft/1.8m Cable- Alarm and App Notification Alerts, No Expensive Hub Required, Simple Plug & Play by Wasserstein (2 Pack)
By Wasserstein
In Stock
$46.99

mpn: 4897080229782, ean: 4897080229782,

4.7 out of 5 stars with 29 reviews
AC Powered Smart Wi-Fi Water Sensor, Flood and Leak Detector with 6ft/1.8m cable- Alarm and App Notification Alerts, No Expensive Hub Required, Simple Plug & Play by Wasserstein (2 Pack)✔ HASSLE-FREE MONITORING - The 3 highly sensitive gold-plated probes keep our home safe from damage by alerting you on the phone instantly or making an audible alarm in the event of any flood or water leakage.. ✔ THOUGHTFUL DESIGN - It can easily be installed anywhere near an AC outlet. The AC connector with


Guardian Leak Detector - 6 Pack
By Guardian by Elexa
In Stock
$249.00

ean: 0785014017410,

4.3 out of 5 stars with 30 reviews
Save yourself thousands of dollars in water damage by using Guardian Leak Detectors throughout your home. Whether you're worried about a broken washing machine, an overflowing sump pump, or a leaking water heater, Guardian has your back! The moment a Leak Detector senses water, extreme cold, or an earthquake, they will automatically send signal the Valve Controller (sold separately) up to 1,000 feet away (line-of-sight) to shut off your water main to prevent further damage. You will receive syst


FIBARO Flood Sensor, Newest Z-Wave Plus Water Leak & Freeze Detector, FGFS-101 ZW5
By Fibaro
In Stock
$54.99

mpn: FGFS-101 ZW5, ean: 0857934005126,

4.4 out of 5 stars with 8 reviews
The Fibaro Flood Sensor is the most functional water leak sensor for your smart home. It is designed to either be placed on the floor or a wall with the gold-plated water-sensing probes Extended by a connected wire. The device can be battery* or VDC powered (12/24 VDC). it has a built-in tilt sensor that reports any movement of the device to the central Z-Wave controller. The Fibaro Flood Sensor is buoyant and can float on the waterfall surface. It has a built-in temperature sensor that can aler


Guardian Leak Detector - 3 Pack
By Guardian by Elexa
In Stock
$132.00

ean: 0785014017403,

4.0 out of 5 stars with 37 reviews
Save yourself thousands of dollars in water damage by using Guardian Leak Detectors throughout your home. Whether you're worried about a broken washing machine, an overflowing sump pump, or a leaking water heater, Guardian has your back! The moment a Leak Detector senses water, extreme cold, or an earthquake, they will automatically send signal the Valve Controller (sold separately) up to 1,000 feet away (line-of-sight) to shut off your water main to prevent further damage. You will receive syst


Grohe 22601LN0 Sense Smart Water Sensor
By GROHE
In Stock
$57.28
$50.00
You Save: 13%

mpn: 22601LN0, ean: 4005176478222,

4.3 out of 5 stars with 42 reviews
The innovative GROHE sense water detector alerts you the moment unwanted water leaks appear with a pulsating red light and buzzer, in addition to an alert which is sent to your smartphone via the Ondus app. This early warning allows you to take immediate action before a simple leak becomes a flood. The Ondus app also provides daily updates on changes in temperature and humidity to help prevent Frost damage and the spread of mold. Perfect in the kitchen, bathroom, laundry room, anywhere a water l


Ultrasonic Water Tank Liquid Depth Level Meter Sensor with Temperature Display,3.3 Inch LED Display
By Walfront
In Stock
$61.19

mpn: Walfront5qxfzt6o3v, ean: 0663862365405,

4.9 out of 5 stars with 14 reviews
Description: Keep an eye on your outdoor water tank from the comfort of your own living room, up to 100m away. Installed at the top of your water tank, the transmitter unit measures the water level using an ultrasonic sensor and temperature using a thermo sensor. You can hang the receiver unit on a wall or pull out the stand and place it on your kitchen bench top, table or desk. View your room's temperature, tank temperature and water level (represented by a 10 element bar graph). You can stor


Sensaphone Water Detector Sensor (FGD-0013)
By Sensaphone
In Stock
$87.86
$78.06
You Save: 11%

mpn: FGD-0013,

4.8 out of 5 stars with 38 reviews
The water detection sensor detects the presence of water on a horizontal surface. The device is compatible with any Sensaphone monitoring system. It can be used to detect leaks in homes or facilities. The sensor is independently powered by internal lithium batteries. The batteries should last for approximately 3-5 years. When the batteries start to run down, the sensor will automatically dial out an alarm when no water is present. Multiple sensors can be wired in series to a single input. The se


Younar Ultrasonic Level Gauge Tank Level Gauge LCD Digital Display Indoor Temperature Liquid Temperature Indicator
By Younar
In Stock
$46.66

mpn: Level Gauge, ean: 0651155682940,

4.3 out of 5 stars with 37 reviews
Feature:1. Monitor tank liquid depth level2. Tank liquid level displayed on a 10-element LCD bar graph3. Min/max records of tank liquid level4. Tank liquid level high/low alarm5. Tank liquid empty alert6. Indoor temperature (oF or oC)7. Tank temperature (oF or oC)8. Time alarm9. Free standing or wall hanging Specification: Indoor temperature range:0~60°COutdoor temperature range :-40~60°CTemperature accuracy: ±1°CWater level measure rang:0 ~15mResolution: about 0.01mAccurate: +/-0.03MTransmi


WaterCop Flood Sensor, Single Probe
By WaterCop
In Stock
$61.54
$59.95
You Save: 3%

mpn: WCDFS1, ean: 0649848067808,

4.5 out of 5 stars with 46 reviews
WaterCop Flood Sensor with Single Sensor Paired with WaterCop Shuts Off Water Valve Replaces WH-100. Made in USA. WCDFS1 water alarm detects moisture with single probe moisture sensor . Power: two AA batteries or hard-wire a 120VAC adapter. Internal radio transmission antenna communicates with WaterCop if installed. Water sensor alarm intensity similar to watch alarm or pager beep when probe detects moisture. WaterCop , if installed, shuts off WaterCop protected water valve. Internal 418 MHz rad


Water Leak Detection Starter Kit by leakSMART includes 3/4" Automatic Water Shutoff Valve, Water Leak Sensor, and Smart Hub
By leakSMART
In Stock
$360.44
$360.03

mpn: 8881000, ean: 0028905888103,

4.0 out of 5 stars with 48 reviews
The leak SMART Second Generation leak prevention kit includes one (1) leakSMART patented, automatic water shut-off valve (3/4''), one (1) leakSMART wireless & waterproof sensor, and one (1) leakSMART system hub. PLEASE NOTE: If you already own a leakSMART, Wink, Iris, or other ZigBee based system, a complete kit is not necessary. Instead, please purchase a valve and sensor(s) separately. Leak Protection: the leakSMART Second Generation valve is a patented, electronic motorized brass water ball v


Water Leak Sensor Range Extender by leakSMART, Maximizes In-Home Flood Protection Coverage
By leakSMART
In Stock
$99.00

mpn: 8850700, ean: 0028905885072,

4.5 out of 5 stars with 56 reviews
Once your leakSMART system is successfully installed and set up, make sure to check the signal strength of each one of your leakSMART sensors within the leakSMART app. If any of your sensors indicate a signal strength of one bar or less, consider adding a leakSMART sensor range extender. The extender will boost weaker signal strength and ensure communication among your leakSMART devices throughout your home. The optional leakSMART sensor range extender will notably expand the range of your leakS


WJLING 2019 UPGRADED Solar Motion Sensor Alarm,Solar LED Lights, Wireless Driveway Alarm, Outdoor,Indoor Weatherproof Business Detect Alert with 2 Sensor and 1 Receiver,38 Chime Tunes - LED Indicators
By WJLING
In Stock
$39.99

ean: 0645312774722,

4.7 out of 5 stars with 8 reviews
It can detected walking out the driveway. It has also detected a car coming and going as well as your neighbor coming and going on his tractor. The sensor picks up movement when things are about halfway up the driveway. LED solar powered motion light is bright to provide security for your home. Function: Solar charging Effective Long range Pretty easy to install Durable and reliable Specifications Working Voltage of the Receiver:110V-240V PIR Sensor:Solor Charging Working Range: Up to 328 fe


FloodStop FS3/8CD Sink (Hot and Cold) FloodStop with 3/8 Inch Compression Valves
By FloodStop
In Stock
$159.95

mpn: FS 3/8-C, ean: 0815361000428,

4.9 out of 5 stars with 10 reviews
Water Alarm with Water Valve Stops Sink Leaks Automatically to Reduce Damage Overstock Special. Save Money! Install a Floodstop FS3/8CD water alarm with automatic water valve shut-off that closes both hot and cold water supplly lines when water leaks under a sink. Sounds an 87 db alarm. Flood Stop unit has two full port motorized water valves, lead free, with 3/8 inch compression fittings to fit hot water and cold water lines. This advanced water leak detection system helps prevent water damage


Onsite Pro FS3/4H Washing Machine FloodStop with Straight Valves
By OnSite Pro
In Stock
$175.00

mpn: FS3/4H, ean: 0815361000916,

4.1 out of 5 stars with 51 reviews
Don't risk your floors, carpets and other personal belongings to costly and ruinous water damage! Prevent flood damage and avoid costly repairs with the easy-to-install Washing Machine Valve Shutoff Kit. This system not only detects leaks early, but it automatically shuts your water off in the event of a leak, alerting you with the control panel's alarm. Incorporate the Flood Stop into your INSTEON or X10 network - the control unit has two NC outputs and plugs with 6'' leads. Designed for both r


Water Alarm - Leak Bug Electronic Leak Detector - Detects as Little as 1/32" of Water- Set of 3 Water Alarms
By SCS Direct
In Stock
$39.95

mpn: DT-43939, ean: 0656103029716,

4.0 out of 5 stars with 24 reviews
Protect your home from water damage and mold with the Leak Bug and Leak Puppy Water Alarm Systems. These water alarms may be adorably designed, but state-of-the-art technology ensures these water alarms will detect leaks as small as 1/32 of an inch. Save yourself thousands of dollars in potential water damage and give yourself peace of mind. The Leak Bug and Leak Puppy will alert you to the first signs of any leak before the damage turns to mold or worse.Water Alarm- Finds Leaks before damage oc


Water Leak Detection Starter Kit by leakSMART includes 1" Automatic Water Shutoff Valve, Water Leak Sensor, and Smart Hub
By leakSMART
In Stock
$351.21
$350.80

mpn: 8881100, ean: 0028905888110,

4.2 out of 5 stars with 21 reviews
The leak SMART Second Generation leak prevention kit includes one (1) leakSMART patented, automatic water shut-off valve (1''), one (1) leakSMART wireless & waterproof sensor, and one (1) leakSMART system hub. PLEASE NOTE: If you already own a leakSMART, Wink, Iris, or other ZigBee based system, a complete kit is not necessary. Instead, please purchase a valve and sensor(s) separately. Leak Protection: the leakSMART Second Generation valve is a patented, electronic motorized brass water ball val


Wasserstein WiFi Water Leak Sensor, Smart Flood Detector (1-Pack, White)
By Wasserstein
In Stock
$29.99
$24.99
You Save: 17%

mpn: 4897080224770, ean: 4897080224770,

4.8 out of 5 stars with 21 reviews
The Wasserstein smart wireless water sensor keep your home safe, by alerting you to potential water leak before the issue becomes too serious. It's battery powered with low energy consumption and it can operate in standby mode for over 6 months. Compact in size that can be fitted easily into the smallest of gaps and it requires no hub or subscription service just to connect to your existing Wi-Fi network, simply download the Wstein App on iOS and Android. Link it to the water sensor then you wil


La Crosse Alerts Mobile 926-25101-GP Wireless Monitor System Set with Dry Probe
By La Crosse Technology
In Stock
$28.47
$28.43

mpn: 926-25101-GP, ean: 6848429996931,

4.8 out of 5 stars with 7 reviews
For proper set up follow the below steps 1. Connect gateway to router. 2. Insert power cord into outlet and into the gateway. 3. Wait for 4 red blinks 4. Optional: Insert Probe into sensor. 5. Insert 2 AAA batteries into sensor. (Dated 2025 or newer) Observe correct polarity. 6. Download La Crosse Alerts Mobile App.Remotely monitors sensors 24/7 using a APP. Perfect for...Backyard temperature and humidity; Plants, gardens and greenhouses; Refrigerators, freezers; Food storage; Sensitive electron


Govee Water Detectors, Wireless Water Leak Detector with 100 DB Loud Alarm, Water Sensor with Sensitive Leak Probes, Water Sensor Alarm for Kitchen Bathroom Basement Floor(Battery Included)-5 Pack
By Govee
In Stock
$49.99

mpn: powerstrip8, ean: 0732840697507,

4.6 out of 5 stars with 43 reviews
【Dripping and Leaking Alarm】Besides 2 groups of back water detectors probes, Our product has one group front probe for water pipe dripping, simply place it in bathrooms, basements, kitchen, underneath sinks or by water heaters to detect water leaks before they cause costly water damage. 【Wireless and Easy to Use】No wire or setup required, the mini size allow you to put it on any place that the dripping and leaking could happen. If you have purchased our Water Leak Detector kit, you can a



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