YoLink Water Leak Sensor 4 is the top pick among smart water leak sensors under $20, rated 4.8 stars across 1,750 customer reviews.
29% OFF
Water Leak Sensor 4
4.8(1.8K)$17.09$23.99
15% OFFWater Leak Sensor 1
4.6(7K)$16.99$19.99
29% OFF
Wi-Fi Water Leak Detector
4.5(2.3K)$11.39$15.99
Water Leak Detector (Sensor Cable Edition)
4.4(1.9K)$19.99
Tapo T300
4.6(536)$19.99
Water Leak Detector
4.3(1.7K)$16.99
5% OFF
Water Leak Sensor
4.2(3.7K)$17.99$18.99
Water Sensor Alarm
4.2(2.9K)$15.99
25% OFF
3-Series Water Sensor
3.8(150)$14.95$19.95
17% OFF2-in-1 Wi-Fi Water Leak & Freeze Detector
3.0(104)$14.99$17.99- News by email
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15% OFF
Smart Water Leakage Sensor
4.2(41)$16.99$19.99
Smart Water Leak Sensor WL2
4.0(44)$17.99
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Frequently asked questions
What are the best smart water leak sensors under $20?
YoLink Water Leak Sensor 4, YoLink Water Leak Sensor 1 and X-Sense Wi-Fi Water Leak Detector lead our ranking of smart water leak sensors under $20, ordered by customer rating weighted by how many reviews back it. The full list compares 12 products in this price range.
How many smart water leak sensors cost less than $20?
This page tracks 12 smart water leak sensors under $20 from 9 brands, with prices starting at $11.39.
Are these prices up to date?
Prices are re-checked continuously, so every card shows the latest price we have. A product whose price rises above $20 drops off this list on the next update.
Looking for more than $20?
See all the water leak sensors in the catalog, compared side by side on specs, price and rating.