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Water Sensor

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Protect your home or valuables from water damage with our water detector. Place inside any sink base cabinet, beside your hot water heater, or HVAC unit.  Xtreme Mats have a location designed specifically for this water detector. Just place on the mat and the alarm activates when water touches the two metal posts on the bottom of the detector.

Locations: water heater, sink cabinet, boiler, sump pump, washing machine, toilets, radiators and more…

Receive 1 (one) FREE* water sensor at checkout with the purchase of an Xtreme Mat. 

You do not need to add the water sensor to your cart. ONE Free water sensor will automatically be added to your cart when you purchase an eligible item (cabinet mat). 

*Limit 1 free sensor per customer.

Additional waters sensors added manually to your cart will be charged retail price.

Creating multiple orders will not result in additional free sensors.

Additional sensors can be purchased from this page.

Free water sensors are only available with mats purchased on and are subject to availability and active promotion periods.


  • LOW-COST, LOUD AND EFFECTIVE water leak alarm designed to help mitigate damage and avoid the associated liabilities and legal exposure to landlords and management companies caused by water leaks.
  • IMPORTANT TOOL to warn apartment dwellers, condo owners, managers and landlords of leak conditions so that they can be fixed before they become much costlier problems.
  • NO BATTERIES REQUIRED. Lasts up to 2 years.
  • SIMPLE INSTALLATION. Just place it in the designated location on the mat or anywhere leaks can happen and forget it. If water is present in the area underneath the sensor it will trigger a 110 dB alarm.
  • PERFECT for water heaters, laundry areas, under sinks, next to toilets, and near any suspected leak locations.
  • TEST your water sensor semi-annually to check battery level.  Place a damp paper towel across the two prongs on the bottom which will trigger the alarm.  If the alarm does not go off or is getting weaker, replace soon.

Dimensions: 1.75″ Round x 1.5″ High

  • Variant: Water Sensor
  • SKU: WS01
  • UPC: 863497000027