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Alert System Type
Water / Leak
Sensor Type
Water Leak / Flood
Battery Operated
Water Resistant
Battery Size
Coin Cell
Ease of Installation
Beginner (Installs < 10 minutes)
Cao Gadgets
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Compact Sensor Tag Monitors for Leaks and sends Immediate Alerts if Detected
Cao Gadgets Wireless Water Sensor
Cao Gadgets Wireless Water Sensor
Cao Gadgets Wireless Water Sensor
Item# 69530
Price: $39.99
Free shipping on orders over $175 - See Details


  • For use with Wireless Sensor Tag Manager Controller
  • Functions as water moisture and moisture sensor
  • Out of range notification feature
  • Up to 700 foot communicating range
  • Elastic cover makes sensor lightweight and drop resistant

Essential Info

Add to your Cao Gadgets Wireless Sensor Tag Manager Controller (sold separately) with a Wireless Water Sensor Tag. This tiny sensor wirelessly alerts the Tag Manager in the event water is detected by the resistive sensors on the tags tip and will also measure the moisture level of the surrounding air or soil. The water sensor alert is immediate upon interaction with water while the moisture level measurement is compared against adjustable user thresholds. Once detected, the alert will be sent via text, tweet, push notification or email to be seen by the user on their smartphone (Android or iOS) or computer. Along with serving as a water and moisture sensor, this tag will also deliver temperature readings and provide out of range notifications; the sensor has a communicating range of up to 700 feet from the Tag Manager. With the option to support up to 255 Cao Gadget sensor tags on the Wireless Sensor Tag Manager, users can easily monitor an entire home without the hassle of difficult installation. The sensor tag is powered by a CR2450 battery that offers 3x the operating life of that used in the Wireless Motion and Temperature Sensor Tag and is protected by an elastic covering that keeps the sensor protected if dropped.



What's Included

  • 1x - Wireless Water Sensor
  • 1x - Velcro Strap

  • More Info

    ISY compatibility
    Open the detail pane of a tag in the Cao Gadget Wireless Sensor Tag Manager interface then select "options" and choose "URL Calling". Locate the event, or events, you wish to enable URL calling for and then click on them and enter your REST web service URL. With an ISY web service home automation controller you can now set scenes using the Cao Gadget sensor tags. For example, program a garage light to turn on when a door is opened leading into the garage.


    ManufacturerCao Gadget
    Manufacturer Product No.51
    UsesWater Sensor
    Moisture Sensor
    Temperature Sensor
    Out of Range Notification
    RangeUp to 700 feet line of sight
    User InterfaceWeb, free iOS and Android app
    NotificationsEmail, text, tweet, push notification or audible


    14 Ratings
    5 star: 57%  (8)
    4 star: 36%  (5)
    3 star: 0%  (0)
    2 star: 7%  (1)
    1 star: 0%  (0)
    Average Customer Rating
    (14 customer ratings)
    Share your thoughts with other customers
    FRANK -- broomfield, CO   7/24/2014
    The temperature measurement seems to work but the humidity measurement never worked. I just don't have the time to deal with the return/replacement.
    Carl -- Massachusetts   3/12/2014
    Just received my tag manager and sensors! The water sensor was easy to register with the tag manager. After installing the Android app on my phone, I did some testing to see how notifications would work. The sensor is quick to respond when it detects moisture, which is great for my purposes. The overpressure valve on my water heater went recently, and this sensor should provide me with a quick heads up if it ever happens again.
    Kerry C -- harpers ferry, WV   3/11/2014
    AWESOME PRODUCT!!! Great response time and nice set up options
    wardy56 -- london, United Kingdom   3/10/2014
    This excellent Sensor has saved my house from flooding a number of times. Great long range connectivity keeps me informed of leaks in my boiler cupboard and under sink. The device is small and efficient on battery and will alert me the second a water droplet hits the sensor.
    Filip -- malmo, Sweden   3/10/2014
    Wow! Finally a cost effective way to measure temperature in my tenants apartments. Other solutions are ridiculous more expensive. My only wish is that it would be even more precise in its measuring. Else it would be 5 star!
    Eric -- toronto, Ontario   3/10/2014
    Excellent product. Very easy to install and configure. I would highly recommend this product to anyone who wants to monitor items that require a certain level of moisture or prevent too much water in a certain area.
    Paul R. -- mentor, OH   3/10/2014
    I looked high and low on the internet for a wireless device that would give me text/email alerts during a flood. This is has been the best option by far. Before I found these, I spent hundreds of dollars for some La Crosse sensors, which I had MANY issues with and was just overall extremely disappointed with even after several weeks when tech support was finally able to get 2 out of the 5 working. This wireless sensor on the other hand is much more responsive, has way more options, supports up to 255 sensors vs 2 on the La Crosse even though they claim it is 5, it has better wireless range, is smaller, it has much better battery life, is cheaper, and best of all does not require any paid subscriptions like La Crosse does.
    JC Dufourd -- paris, France   3/9/2014
    Works flawlessly, saving my bonsai again and again
    David -- minneapolis, MN   3/9/2014
    Great product for areas with pipes that like to freeze
    Gregg C -- tulsa, OK   3/9/2014
    Very slick device; works exactly as advertised. I use it to monitor the water level in my boat's bilge when I am away from the dock.
    Ed Mack -- colleyville, TX   3/9/2014
    After hearing nightmares from neighbors who had their A/C units malfunction and leak water into their homes I decided I needed to take action. I saw the moisture sensor in an Ad from Smarthome and decided to order one as it appeared ideal for my application. I installed one device in the water pan of one of my A/C units and tested it. It worked great, got the message on my phone as soon as it detected the water. I order 3 more for my other A/C unit and my 2 water heaters. Another nice feature I use is the temperature sensor; I have it set to warn me if I get too close to freezing in my attic where I have water pipes. The only regret I have which is the reason for 4 starts is the fact that the onboard battery is not changeable which means you need to replace the device when the battery dies. It would be nice if the manufacturer adds this capability into future models. It would be a simple modification.
    Neil Singer -- sedona, AZ   3/9/2014
    I have an older home and frequently have water leaks. I have 17 of these sensors located all over my home to notify me quickly if I do develop a leak. They work flawlessly. I did spring a leak and was notified immediately on my phone, and was the able to prevent any water damage and attend to the situation. These are great!
    Polly -- san jose, CA   3/9/2014
    Over all very happy with the moisture sensor. The range is especially nice. I have the receiver on the second story of our building, and the sensor is in the basement, and it works just fine. It is a bit...moody... though. It's inside a bucket that I use to catch any flooding water from my old water heater, and if I turn the bucket around so the sensor is on the other side next to the big metal water heater it complains about losing signal every now and then. But turn it back around and it's perfectly happy, and wander around the back yard and it's happy. It promptly senses water when I test it, and so far the emails come through promptly to me letting me know.
    Autopilot -- Arizona   3/9/2014
    This water sensor works very well. The range is at least 150 ft through one interior wall my usage and response time and reliability are good in my testing. Additional benefit of temp monitor allows useful real time status that device is working. The setup options for batt/power mgmt, range, response time and alert types are good. My only complaint was it's a bit confusing getting the moisture and temp ranges setup and calibrated initially. A little bit of trial and error required to convince myself that all was setup properly. Once 'dialed in' it has performed well.


    Cao Gadgets Wireless Motion and Temperature Sensor Tag       
    Cao Gadgets Wireless Motion and Temperature Sensor Tag       

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