Best Outdoor Water Detectors in 2026

Be notified of possible home flooding with this SimpliSafe water sensor

Alerts you whenever it comes into contact with fluid with an audible alert

Place in areas where flooding or water damage may occur

Easy to install. Scan, Plug and Play. Full installation and setup in less than 10 minutes

Protected and informed, with Realtime phone app notifications, emails, SMS messages and automations (turn on optional sirens, smart plugs..)

FAIL/SAFE: Patented technology! Pair your leak sensors to battery powered valve controllers and/or sirens. No internet, no WiFi, power outage no worries!

Detects as little as 1/32 in. of water to offer an effective early warning system

Solid-state circuitry is extremely sensitive and reliable

Loud 110 dB alarm can be heard throughout the house

Dripping and Leaking Alarm: Besides 2 groups of backwater detector sensor probes, each detector also has 1 group of front probes for pipe dripping.(Note: Only paired with the gateway of the water detector, cannot paired with the gateway of the hygrometer.)

Wireless and Easy to Use: No wire or setup required, the mini size allows you to put it on any place where the water leak may be happening. With kit "B07QP153GT", you are able to monitor leaks on your phone even you're not at home."B07QP153GT" not Included in Package.

Adjustable Alarm Audio: Each water leak detector features an 0-100 dB adjustable alarm audio. Loud enough to be heard even if leak happens in basement, press the button to mute the sound when you find the leaking place.

24/7 365 days automatic water leakage alarm is triggered when leakage or flooding is detected, a low-cost, simple, and effective device prevents property damage, monetary loss, health risks caused by water damage

Powerful 130-dB alarm travels up to 100 yards, from end-zone to end-zone

Advanced and sophisticated solid state circuitry ensures long-term sensitive and reliable operation

📶 Why Worry About WiFi? YoLink devices communicate by LoRa, an industrial-grade protocol that provides up to ¼ mile open air range. Devices do NOT connect to your network or even to the internet; they communicate with the Hub. Strong signal level, obstruction penetration, no (WiFi) holes in your internet security, and fully-encrypted communications provide more than most ask for from their smart home system!

⏱ Set it & Forget it! Installs in seconds! The YoLink wireless Water Sensor could not be easier to install; just place near or under the equipment you wish to monitor. Suggested uses are near or under, toilets, water heaters, laundry machines, dishwashers, sinks, fish tanks, in or near sump pumps, and by any other location subject to water leaks and flooding.

📡 Extreme Long Range: Powered by LoRa technology, the long-range yet low-power system offers the industry’s longest receiving range in the market (1/4 mile). Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property. Low-power operation squeezes the most out of the batteries, which can last from 2 to 10 years!

📶 Why Worry About WiFi? YoLink devices communicate by LoRa, an industrial-grade protocol that provides up to ¼ mile open air range. Devices do NOT connect to your network or even to the internet; they communicate with the Hub. Strong signal level, obstruction penetration, no (WiFi) holes in your internet security, and fully-encrypted communications provide more than most ask for from their smart home system!

⏱ Set it & Forget it! Installs in seconds! The YoLink wireless Water Sensor could not be easier to install; just place near or under the equipment you wish to monitor. Suggested uses are near or under, toilets, water heaters, laundry machines, dishwashers, sinks, fish tanks, in or near sump pumps, and by any other location subject to water leaks and flooding.

📡 Extreme Long Range: Powered by LoRa technology, the long-range yet low-power system offers the industry’s longest receiving range in the market (1/4 mile). Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property. Low-power operation squeezes the most out of the batteries, which can last from 2 to 10 years!

120dB loud alarm voice, keep alarm to notice you or neighbors until the water dry or sensor turn off, low cost and effective water leak alarm to prevent water damage at your home and business

High sensitive 24k plating detect board, repeated use after dry the board

3M double side paster (included) for easy install anywhere

✽【NOTES】An Aqara Hub is required and sold separately. Requires a secured 2. 4 gigahertz WiFi network connection. The Aqara M2 or M1S Hub can connect up to 128 devices(*use of a repeater such as the Aqara Smart Plug or Aqara Smart Wall Switch(With Neutral) is required).

【FLOOD DETECTION】Whenever the Aqara Water Leak Sensor detects water, it can send an alert to your phone and activate the local alarm on the Aqara Hub to prevent leaks and flooding.

【HOME AUTOMATION】Controls and triggers Aqara connected devices when excess water is detected.

Only leak-detecting product that turns off the appliance and sounds an alarm when water is detected—Prevents major flooding and water damage

New and improved sensor is capable of detecting extremely small amounts of water—works great with dehumidifiers!

Keeps appliance turned off until WaterWatcher is manually reset—Stops the problem in its tracks!

📶 Why Worry About WiFi? YoLink devices communicate by LoRa, an industrial-grade protocol that provides up to ¼ mile open air range. Devices do NOT connect to your network or even to the internet; they communicate with the Hub. Strong signal level, obstruction penetration, no (WiFi) holes in your internet security, and fully-encrypted communications provide more than most ask for from their smart home system!

⏱ Set it & Forget it! Installs in seconds! The YoLink wireless Water Sensor could not be easier to install; just place near or under the equipment you wish to monitor. Suggested uses are near or under, toilets, water heaters, laundry machines, dishwashers, sinks, fish tanks, in or near sump pumps, and by any other location subject to water leaks and flooding.

📡 Extreme Long Range: Powered by LoRa technology, the long-range yet low-power system offers the industry’s longest receiving range in the market (1/4 mile). Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property. Low-power operation squeezes the most out of the batteries, which can last from 2 to 10 years!

LEAK AND FLOOD PROTECTION:Place the Aeotec SmartThings Water Leak Sensor under sinks, refrigerators, washing machines, and more to detect excess water or moisture and receive immediate alerts on your phone by connecting to the Aeotec Smart Home Hub and using the SmartThings app

TEMPERATURE MONITORING: The sensor also monitors temperature, requiring a 32- to 104-degree operating temperature; You can choose from light-up or siren alerts when abnormal moisture or temperatures are detected in sensitive areas

SHUT DOWN SYSTEMS: You can program your other connected smart devices to shut off water flow or shut down electronics automatically to prevent electrocution and damage to your home from water leaks and irregular temperatures

Real-time Alerts: Connect the gateway to WiFi, and the water leak detector will instantly send emails, App notifications & alerts to your phone when water leakage occurs even you're not at home. Water sensors and gateway are paired right out of the box.

Loud Alarm with Mute: If WiFi is not temporarily available, our 100dB water alarm is loud enough to be heard. Press the Mute button to silence the alarm when you find the leak.

Drip and Leak Alerts: Water sensor comes with 2 groups of back water detector probes & 1 group of front probes for pipe dripping detection. Use the App to name each sensor with its location.

At the first signs of leaks, freezes, or excess humidity, the Wi-Fi Water Leak & Freeze Detector can alert your smartphone.

Notification includes mobile & audible alerts – messages can alert you or your family/friends wherever you are, while audible alerts sound when you are at home.

Connects to standard Home Wi-Fi directly – no need for an extra hub.

PROTECT YOUR HOME FROM WATER DAMAGE: Can be placed in the home wherever there is a risk for potential water damage, such as a flooding basement, washing machine leak, hot water tank failure, etc

24/7 PROTECTION: Smart technology detects leaks to help reduce the risk of water damage by providing 24/7 monitoring

REAL-TIME NOTIFICATIONS: Connects to the Moen Smart Water App to notify you of moisture through notifications to their smartphone. The Moen Smart Water App can also be customized to monitor moisture levels, humidity, and temperature

MONITOR WATER LEVELS from your home with our septic alarm by Sump Alarm. Our flood sensor lets you know when water levels approach a dangerous stage.

IP67-rated with gasketed enclosure and weatherproof components, Sump Alarm Water Alarm is ideal for lift stations, grinder pumps and pool sumps.

POLYPROPYLENE FLOAT SWITCH on our water sensor alarm detects changes within 6” for fast troubleshooting. Minimize property damage with quick notification from our water level sensor.

Email and text message notification when water level change is detected. All services are free.

Battery powered wireless water level detector using your WiFi, no app to install and no hub is required. Perfect as a standalone high or low water alarm.

Waterproof float sensor with a 3 ft wire connected to a rugged enclosure protecting smart electronics. This float sensor can be used to detect high or low water levels, the default setting detects high water levels. Flip the float ring and use this device to detect low water levels in aquariums, ponds, and storage tanks.

Avoid Costly Water Damage: Master Sensor Plug-in with a compact, waterproof Sensor Pod (DCH-S163) detects leaks; multi-alert system (voice, alarm, text) notifies you right away

Alerts include powerful LED strobe light, built-in 100dB alarm, mobile phone notifications, and voice alerts with Google speakers providing real-time notifications wherever you are

Easy Setup and Placement: Master Sensor Plug utilizes a 5-foot cord with an attachable 1.5-foot water-sensing cable. Wirelessly expand coverage in up to 16 susceptible areas like next to water heaters, washers, and under sinks with Sensor Pods (DCH-S163)

Liquid Detection Sensor for Alarm Systems and / or Home Electronic Projects

6 Feet Of Cable, 2 Mounting Screws, and Instructions

Compatible with Level Sense Devices

HIGH SENSITIVE SENSOR CONTACTS - Are you still worrying the water leak damage in your home? Protect your home from potential water damage by installing a leak alarm is best way. Our electronic water leak detector with high sensitive sensor contacts responses quickly and accurately, it is fully automatic and does not require you to install any wiring, two metal sensor contacts of the water sensor to give you a loud alarming when water leak is detected, giving you a reliable result

Loud Alarming - 95dB alarm sound can be heard throughout the WHOLE HOUSE once the water leak or water flow through the sensor contacts. When touching water leak or flooding, a loud alarm will sound from the water sensor alarms. At this time,please take action to deal with it as soon as possible and remove the alarm unit from the leaking environment.This water leak sensor would help you away from water leak damage,choose it go home

Easy to Install, Smart, Affordable, and Compact - Povlen Water Leak Detector is a small device with 3 packs that you place near your hot water heater, toilet, sink, or anywhere else you might get a leak. In the event something does start leaking, the sensor will sound an alarm wherever it’s needed. This water alarms for basements powered by 1X 9V 6F 22 battery (battery is included), just twist off the sensor cover and install the battery manually, then this leak sensor can begin to work normally

App Monitor and instant Alerts: AGSHOME Hub requires a 2.4 GHz Wi-Fi connection, And it will push the real-time notifications in your smartphone when water leakage happens even you are away from your home.Water sensors and hub are not paired right out of the box.

120dB alarm : The Water Leak detectors provides a loud Audible alert to you when In flood situations,and the Leak Alert floats and continues to sound an alarm until the battery is depleted.To minimize property damage, respond to the alarm as quickly as possible. Wipe it out quickly.

Easy to install - no screws, no tape, no wires.The water sensors is Perfect for Any Room, Apartment, Home, Office. Place a water Leak sensor in any location where there is a potential for water damage and name each water detector.

Smart Water Leak Detector: Monitor critical locations at risk of flooding, and be informed immediately of the presence of water, preventing costly repairs; Smart Water Level Monitoring: The sensor may be configured for water level monitoring – be informed when water is no longer present or when water levels recede. Monitor water supplies for pet care, house plants, gardening and more

World's Longest Wireless Range: Powered by LoRa technology, the long-range yet low-power system offers the industry’s longest receiving range in the market (1/4 mile). Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property.

Early-Warning Notifications: Receive real-time early-warning notifications and protect your home and property from water damage. Notifications are in the form of smartphone banner alerts, limited SMS/text messages and emails, each optional and configured per your needs. Additionally, you may configure your system to activate a siren alarm and/or lights in your home.

PREVENT WATER DAMAGE: Receive alerts on your phone when water is detected by the sensor once you include it to your Z-Wave hub (required, sold separately). Check below for compatibility. Pair with the Zooz Titan Water Valve actuator (sold separately) for a smart flood prevention system.

EXTRA SMALL: Place it under your appliances to monitor for leaks discreetly. It's OK if the device is splashed with water but it can't be fully submerged so keep that in mind when choosing the installation location.

NEW 700 SERIES CHIP: You get more Z-Wave range and longer battery life with this sensor. Better signal means more reliable and quicker reports to help you act faster in case of a leak.

PROTECT YOUR HOME: Detect leaks in an instant with this water sensor leak detector. Connect this smart water leak alarm to your home's 2.4 GHz Wi-Fi to receive instant notifications right to your phone or tablet.

CONTINUOUS MONITORING: Detect leaks when and where they happen and keep your entire home protected from leaks and floods 24/7. With this water detector alarm, you can save thousands of dollars in home repairs.

FITS ANYWHERE: Place the water sensor alarm under sinks, washing machines, hot water tanks, or anywhere in the basement. With a compact design, optional smaller extender cord and battery-operated power, you can place this water leak detector anywhere.

【EXCLUSIVE DESIGN AND TECHNICAL INVENTION】- The first 2-in-1 separated dual probe structure, which can meet the needs of almost all water leakage and water level detection scenarios. It can detect two scenes at the same time, the left and right probes can be quickly distinguished by different sounds, and the left and right alarms can also be quickly distinguished by APP alerts.

【RECEIVE ALERTS EVEN WHEN YOU ARE NOT AT HOME】- Our smart devices can be connected to cell phones and iPad via WiFi (2.4G ONLY). After successful connection, when our detector detects a water leak or alarm, as long as the cell phone network is normal, no matter where you are, you can receive a push alert from the app（FREE). SMS/phone call is a paid service, you choose whether to open it or not?

【100 DB LOUD ALARM SOUND】 - When there is no network, if the detector detects a dangerous situation, it will also send out a 100 dB sound to alert at the first time. If it is not handled, it will sound the alarm again every 10 minutes. In addition, the sound can adjustable: HIGH - MEDIUM- LOW - MUTE, Quickly double-click the button to adjust. 【NOTE: In MUTE mode, If the WiFi is normal, the APP will receive push notifications as usual】

It has strong practicability and is suitable for water leakage detection of various construction pipelines.

Detect pipe leakage by amplifying the sound, with headphones, you can adjust the sound level.

Dual probe design, including circular probe and needle probe, can be switched according to the site conditions.

It's water probe(two lead) only, without any circuit. Water Liquid Leak Level Probe.

Material: ABS; Detecting Leads Material: stainless steel with Electroplating

It's great to use with water detector to prevent water leak or flood. Use this to extend detection points.

😎Measurement & Analysis Instruments Other Instruments:PQWT-L series is the newly updated and multi-functional water leak detector, it is applied to different detecting leakage of outdoor water pipe, fire pipe, heating system, indoor water pipe, and underground heating floor pipe. By collecting and analyzing leakage signal, it solves the problem of pressure pipe water leak.

😎Working principle:the device collects leaking sound signal through its sensor, collected signal will be processed by host machine and displayed on the host machine screen in the form of visual spectrum and signal bars. At the same time, the sound will also be output to its earphone through the host machine. Water leakage point can be found out easily through the combination of "listening to the abnormal sound" and "observing the abnormal signal bars”.

😎Combine the dual-mode function acoustic vibration with spectrum technology to determine the accurate leakage.

[Leak Detection Design] iSpring water leak detection system is designed and to be installed on whole house water pipe to detect and set alarm for possible leak

[Automatic Working] The water leak detection will shut off water supply automatically to prevent flooding when it detects a possible leak. It includes a 3/4" NPT automatic shut-off ball valve

[8 Water Sensors] The controller unit is able to connect up to 8 water detection sensors and 2 sensors are included

The DS-7000 is the latest leak detector producted by Daeseong Engineering, which has 30 years history of manufacturing leak detection. Leakage detectors are available both outdoors and indoors, and are essential equipment for facility experts.

The sound range of the product is divided into high, mid, and low, and can be controlled in detail with the knob. The screen displays a sound level grapf, which can help you detection. Usually, the mid and high range are used for indoor detection, and the low range is used for outdoor detection.

For the best matching of equipment and sensors, the parts in the sensor were made from Germany, and the external headphones were imported from Japan. The rest of the products are made from Korean parts. With all of these combinations, it provides the best sound quality.