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Overview

Defend your home against water damage with this Ring Alarm flood and freeze sensor. Designed to automatically detect moisture or low temperatures, this sensor will send an alert to your phone whenever an appliance malfunctions or pipes are in danger of freezing over. Pair it with other Ring Alarm devices to create a whole-home protection system.

Ring Alarm Flood & Freeze Sensor

Model: 4SF1S8-0EN0
Web Code: 13507986
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Return Policy

30 days to return or exchange

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Manufacturer's Warranty

Check with the manufacturer for details or add Best Buy Protection for extra coverage.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

  • Sends alerts to your phone whenever water is detected or the temperature drops below 4.5 degrees Celsius to keep you ahead of water damage
  • Versatile placement options let you place the sensor near sinks, bathtubs, showers, refrigerators, freezers, washing machines, dishwashers, water heaters, water coolers, toilets, basements, and any other sources of potential leaks
  • Download the app to receive instant push notifications regarding water leaking or low temperatures
  • Includes 3V lithium battery
  • Ring Alarm Security Kit required for setup (sold separately)
  • Ring Alarm and all Ring Alarm accessories require a subscription for digital notifications, in-app features, digital arming/disarming, and integration with other Ring, Echo, and third party products. Subscription sold separately. Terms and conditions apply
Product Condition
Brand New
Water Sensor
Yes
Temperature Sensor
Yes

Compatibility

Works with Amazon Alexa
Yes
Works with Google Assistant
Yes
Works with Apple HomeKit
No
Works with Matter
No
IFTTT
Yes

Controls

Voice Assistant Built-In
Amazon Alexa
Apps
Ring App
Connectivity
Wireless
Connectivity
Z-Wave; Works with Google Assistant (Limited functionality)
Wi-Fi
Yes
Bluetooth
No
Thread Support
No
Zigbee Support
No
Hub/Bridge Required
Yes
Number of Supported Wireless Zones
1
Wireless Transmission Distance
76.2 m

Power

Power Source
Battery

Alarm

Security Alarms
Yes

Dimension

Width
7.49 cm
Depth
7.49 cm
Height
2.69 cm
Width (Inches)
2.95 in
Height (Inches)
1.06 in
Depth (Inches)
2.95 in
Weight
0.05 kg

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Information about the manufacturer’s availability guarantee can be found .