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Updated October 2021
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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
Bottom line
Pros
Cons
Best of the Best
Glentronics BWD-HWA Water Leak Sensor
Glentronics
BWD-HWA Water Leak Sensor
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Bottom Line

Water leak sensor that allows you to add up to 100 feet of wire to place sensor in desired location.

Pros

Highly sensitive water leak sensor that measures water as shallow as 1/32 of an inch. Sensor ships with 6 feet of wire to attach to base unit, but you can add 100 additional feet if desired. Makes use of a 9-volt battery, and the sensor is designed to use as little battery power as possible.

Cons

May not detect small leaks in time. Would be nice if alarm's volume could be adjusted.

Best Bang for the Buck
Instapark IN07A Water Leak Sensor, 3 Pack
Instapark
IN07A Water Leak Sensor, 3 Pack
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Bottom Line

Extremely low price for 3 water detection units. Offers a loud alarm, so you're sure to hear it.

Pros

If you need multiple water detection sensors at a low price, this set gives you a great value. The 9-volt batteries to operate these sensors are included. Extremely loud alarm on the base unit of 130 decibels. Relatively easy to install with a suction cup or adhesive tape.

Cons

Sensor's wire to attach to the base unit is less than 4 feet long, which is shorter than most.

Zircon Smart Water Leak Sensor
Zircon
Smart Water Leak Sensor
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Bottom Line

Costs a little more than some other sensors, but its ability to alert you to leaks via e-mail is helpful.

Pros

Smart water leak detection system that allows you to name each sensor, so you know exactly where the leak is occurring. Will receive alerts by e-mail, audio alarm, and flashing light. Can be set up to track leaks in almost any location. Runs from a battery, so installation is a snap.

Cons

Can be tricky to hook up to your WiFi network. May miss water from some small leaks.

First Alert Water Leak Sensor, 3 Pack
First Alert
Water Leak Sensor, 3 Pack
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Bottom Line

Good value, as you'll receive 3 battery operated water leak detection sensors for 1 price.

Pros

Designed to operate in non-controlled temperature conditions, so you can employ these sensors almost anywhere. Sensor can be placed within 6 feet of base unit. Uses one 9-volt battery per sensor that's included, enhancing the value you'll receive.

Cons

Alarm could definitely be louder. No low-battery alarm available, so you must test it regularly.

Samsung SmartThings Water Leak Sensor
Samsung
SmartThings Water Leak Sensor
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Bottom Line

Sensor that connects to your WiFi network, ensuring you can receive a smartphone alert when a leak occurs.

Pros

Works in temperatures ranging from 32 to 104 degrees Fahrenheit. Receive notifications on the SmartThings app on your smartphone or through Amazon Alexa. Compared to some other smart devices, it's relatively easy to connect this water sensor to your WiFi network.

Cons

Limited to working with the SmartThings Hub system. Only runs from CR2 sized batteries.

HOW WE TESTED

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

36
Models
Considered
133
Consumers
Consulted
18
Hours
Researched
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