Alarm Flood & Freeze Sensor - White
Alarm Flood & Freeze Sensor - White Ring Alarm Flood and Freeze Sensor placed on a wet, tiled floor next to a bathtub and plumbing fixtures.
Alarm Flood & Freeze Sensor - White Ring Alarm Flood and Freeze Sensor placed on a wooden shelf next to folded towels and toiletry bottles.
Alarm Flood & Freeze Sensor - White Ring Alarm Flood and Freeze Sensor placed on the tiled bathroom floor near a bathtub.
Alarm Flood & Freeze Sensor - White
Best Seller

Alarm Flood & Freeze Sensor

4.5

4.5 out of 5 stars
4.5 out of 5 stars
4.5 out of 5 stars
4.5 out of 5 stars
4.5 out of 5 stars
6,273

$34.99

Take up to 18 months to pay with as low as 0% APR on some term lengths and no late fees. Prequalify now.
Place the Alarm Flood and Freeze Sensor on the floor or any flat surface under a sink, refrigerator or any other water source, and get alerts when water or low temperatures are detected.

Professional Installer? Join our Ring Partner Program to get exclusive access and benefits only for certified Ring Partners.



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Fastest delivery on Mon, May 19 or Standard delivery on Tue, May 20

Need help deciding? Build your system or call 833-906-1146 to speak with an Expert.

Help protect your home from water damage.

Place Sensors near water sources at home to stay ahead of potential leaks and frozen pipes. get notifications when water is detected or when the temperature drops below 40°F. Add Alarm Professional Monitoring to your eligible Ring Home Plan, subscription required, sold separately, and we’ll give you an automated call to let you know there’s an issue.

  • Requires Ring Alarm or Ring Alarm Pro Security Kit.
  • Sends mobile and email notifications (subscription required, sold separately).
  • Get mobile and email notifications when triggered.

Tech Specs

Size and Color Arrow Icon

Dimensions

Diameter: 2.95 inches (7.5 cm.)
Height: 1.06 inches (2.7 cm.)

Available Colors

White

Power and Connectivity Arrow Icon

Power

3V Lithium Battery (included), non-rechargeable

Battery Life

Max 3 Years

Connectivity

Z-Wave (up to 250-foot range to Base Station)

Installation Arrow Icon

Operating Conditions

32°F to 120°F (0°C to 49°C)

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Frequently Asked Questions

Where does Alarm Flood & Freeze Sensor ship to?

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Alarm Flood & Freeze Sensor ships to the continental US (excluding American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands) and Canada.

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Amazon Customer Reviews

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4.5 out of 5

6,273 global ratings

5 star
78%
4 star
12%
3 star
4%
2 star
1%
1 star
5%
Reviews with images

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Previous
Offers fast response and peace of mind even when not home!Offers fast response and peace of mind even when not home!Works well,great for basementsWorks well,great for basementsGreat water sensor! Horrible freeze detectionGreat water sensor! Horrible freeze detectionWorks great (unfortunately!)NecessityNecessityNecessityNecessitySuper easy to installWorks as advertisedWorks as advertisedConfused & dissatisfied

Customer reviews

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Verified Purchase

Saved me from major flooding

Reviewed in the United States on April 30, 2025
Accurate Freeze Detection: Alerts when temperatures drop to near-freezing, helping prevent pipe bursts.

Easy Integration: Pairs seamlessly with Ring Alarm and the Ring app.

Compact & Wireless: Battery-powered and easy to place under sinks, near pipes, or in basements.
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Amazon Customer
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Verified Purchase

Absolute money saver!

Reviewed in the United States on April 25, 2024
This device has saved me over hundreds, if not thousands, of dollars! I placed this near the overflow valve on my water heater to detect any possible leaks down the road. Well not even a year later the sensor went off and sure enough the water heater had started leaking and failing. Had it not been ... Read more
Amazon Customer
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Verified Purchase

Lifesaver Alert: Superior Basement Protection

Reviewed in the United States on March 4, 2024
The Ring Flood Sensor has become an indispensable asset in our home, shielding us from basement flooding on two separate occasions. Living in an area prone to heavy rains, the threat of water damage loomed large until we installed this remarkable device.

The Ring Flood Sensor's advanced t...
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Verified Purchase

Reliable, big, no temp sensor

Reviewed in the United States on February 15, 2021
We replaced our Samsung SmartThings leak sensors with these as we are moving over to the ring eco-system for security and home protection.

These were easy to install and easy to integrate into the system. One of them may not have connected but a quick restart and it was up and running.
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Verified Purchase

A "must have" for laundry rooms and boiler rooms UPDATED 9/16/20

Reviewed in the United States on November 29, 2019
I tested it and it works- installed in my furnace room so if my boiler springs a leak I'll know before it destroys my basement. It's simple, no frills, installs easily and then you just place it and forget it. I think the only thing I'd prefer is if it adhered to the floor so if it gets bumped it wo... Read more
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1Professional Monitoring is an add-on plan that first requires a compatible Ring Home subscription. Both sold separately. Service available within the U.S. (all 50 states, but not U.S. territories) and in Canada (excluding Quebec). Ring does not own its monitoring center. Smoke and carbon monoxide monitoring is not available for business or commercially zoned addresses. See Ring Alarm licenses at: ring.com/licenses. Additional fees may be required for permits, false alarms, or Alarm Verified Guard Response, depending on your local jurisdiction.

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