---
product_id: 58131086
title: "Water Sensor Alarm, Smart Water Leak Detector for Home & Basements | Made in The USA | Automatic Flood Detectors and Water Alarm, Pure Water Capable (WaterWatcher)"
brand: "hydrocheck"
price: "¥29375"
currency: JPY
in_stock: true
reviews_count: 10
category: "Hydro Check"
url: https://www.desertcart.jp/products/58131086-water-sensor-alarm-smart-water-leak-detector-for-home-basements
store_origin: JP
region: Japan
---

# Detects water at 0.2 inches Auto appliance shutoff 5-year warranty protection Water Sensor Alarm, Smart Water Leak Detector for Home & Basements | Made in The USA | Automatic Flood Detectors and Water Alarm, Pure Water Capable (WaterWatcher)

**Brand:** hydrocheck
**Price:** ¥29375
**Availability:** ✅ In Stock

## Summary

> 💦 Stay dry, stay worry-free — the smart water watchdog your home deserves!

## Quick Answers

- **What is this?** Water Sensor Alarm, Smart Water Leak Detector for Home & Basements | Made in The USA | Automatic Flood Detectors and Water Alarm, Pure Water Capable (WaterWatcher) by hydrocheck
- **How much does it cost?** ¥29375 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/58131086-water-sensor-alarm-smart-water-leak-detector-for-home-basements)

## Best For

- hydrocheck enthusiasts

## Why This Product

- Trusted hydrocheck brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Manual Reset Safety:** Ensures you control when appliances restart, preventing repeated damage cycles.
- • **Pinpoint Leak Detection:** Ultra-sensitive sensor catches even the smallest water traces before disaster strikes.
- • **Versatile Home Protection:** Perfect for dehumidifiers, washing machines, aquariums, and more—one device, total peace of mind.
- • **Automatic Appliance Shutdown:** Stops water damage in its tracks by cutting power to connected devices instantly.
- • **Built to Last with Confidence:** Proudly made in the USA and backed by a 5-year warranty plus expert customer support.

## Overview

The WaterWatcher is a compact, US-made smart water leak detector that sounds an 85 dB alarm and automatically shuts off connected appliances upon detecting as little as 0.2 inches of water. Compatible with a wide range of home devices, it features a manual reset for added safety and comes with a 5-year warranty, delivering reliable flood prevention and peace of mind for modern homes.

## Description

HydroCheck Water Sensor Alarm, Smart Water Leak Detector for Home & Basements | Made in The USA | Automatic Flood Detectors and Water Alarm, Pure Water Capable (WaterWatcher) - Home And Garden Products - desertcart.com

Review: Water damage can be bad, esp if you don’t know it is happening. Solved! - Compact sensor, not only alerts with 85 db alarm but also shuts off my dehumifier. I use a dehumidifer in the attic above my clothes closet (yes you can guess my problem). The dehumidifer did its duty, overflowed and ran down from the unfinished attic into my closet. 7 suits, numerous shirts, some Sheetrock damaged and corner tape required fixing. Found this alarm/shut off switch on desertcart. Am working right now to test a catch basin that houses the dehumidifier so if an overflow occurs it sonically notifies us while turning off the dehumidifier. So far all the “mock-ups” have worked, water in the catch basin sets off the alarm as well as turns off the dehumidifer long before there is enough water to cause damage. The alarm sets off at 0.2 inches of water in a 5 inch deep catch basin. Plenty of leeway. Easy to install, connects to a single electric receptical. Pretty loud alarm, don’t know if I really need that because of the automatic shutoff.
Review: A must-have for your washing machine! - I recently repaired my washing machine and had little confidence about how well the repair would hold up, so I wanted an alarm to let me know if there were any leaks. This device does it all: 1. It has a sensor you place on the ground that detects water. It needs to be on a flat surface. It will detect water if the entire surface area below the sensor is wet, but it doesn't have to be a lot of water. Placing the sensor in a pan and dumping a cup of water in was enough to set the alarm off, so it is sensitive but won't falsely trigger. Think of it as a "puddle detector". Note if there is water near the sensor, but not under it, it won't trigger. So place it where you think water will most likely pool up. 2. It will sound an alarm that is loud, but not "wake the neighbors" loud until you push a button on the side to cancel the alarm. 3. It also TURNS OFF THE POWER to the device plugged into it! So for a washing machine where the water valve solenoids have to be energized to let water flow, they will get shut off automatically and the water will stop. That's exactly what I wanted! I think the cable from the main unit to the sensor is a little flimsy but once you set this thing up you'll probably never touch it again, so it's fine. I don't know if the power outlet on it is UL compliant, but if you are concerned about that you can still use this detector with nothing plugged into the outlet. In that case it will sound the alarm but won't turn anything off. I have a lot more confidence running the washing machine when I am elsewhere in the house knowing this alarm is monitoring the water situation. Highly recommended!

## Features

- PREVENT MAJOR FLOODING & WATER DAMAGE: The only leak-detecting product that sounds an alarm when water is detected and turns off the appliance automatically. Say goodbye to costly water-related disasters by preventing flooding and water damage with our water leak detectors for homes.
- ENHANCED SENSOR FOR PRECISE DETECTION: Our new and improved sensor pinpoints the smallest water traces, making it the ideal companion for dehumidifiers. Catch even the tiniest leaks to prevent further leakage and potential harm.
- MANUAL RESET FOR ADDED SAFETY: Once WaterWatcher detects water, it keeps appliances off until manually reset. This intelligent feature stops issues in their tracks, letting you address them without delay.
- VERSATILE COMPATIBILITY: From dehumidifiers, aquariums, hydroponics, washing machines, well pumps, and more! HydroCheck WaterWatcher works flawlessly with a variety of appliances, ensuring comprehensive water leak detection.
- 5-YEAR WARRANTY & EXCEPTIONAL CUSTOMER SUPPORT: We stand behind the quality of our product with a 5-year warranty and our friendly and knowledgeable customer support team is ready to assist you with any product or installation queries.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00988NOV2 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #90,352 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #70 in Water Detectors & Alarms |
| Control Method | App |
| Customer Reviews | 4.7 4.7 out of 5 stars (335) |
| Date First Available | September 9, 2012 |
| Included Components | WaterWatcher Leak Detector |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 14.4 ounces |
| Item model number | WaterWatcher |
| Manufacturer | STAK Enterprises, Inc |
| Mounting Type | Tabletop Mount |
| Part Number | WaterWatcher |
| Product Dimensions | 2.75 x 2.5 x 3.5 inches |
| Sensor Technology | Contact Sensor |
| Style | Water Watcher |
| UPC | 891138000129 |
| Voltage | 120 Volts |
| Wattage | 2.4 watts |

## Product Details

- **Brand:** HydroCheck
- **Color:** Black
- **Compatible Devices:** dehumidifiers, aquariums, washing machines, well pumps
- **Power Source:** AC
- **Product Dimensions:** 6"L x 4"W x 0.92"H

## Images

![Water Sensor Alarm, Smart Water Leak Detector for Home & Basements | Made in The USA | Automatic Flood Detectors and Water Alarm, Pure Water Capable (WaterWatcher) - Image 1](https://m.media-amazon.com/images/I/81XunwKZvVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Water damage can be bad, esp if you don’t know it is happening. Solved!
*by B***F on December 17, 2025*

Compact sensor, not only alerts with 85 db alarm but also shuts off my dehumifier. I use a dehumidifer in the attic above my clothes closet (yes you can guess my problem). The dehumidifer did its duty, overflowed and ran down from the unfinished attic into my closet. 7 suits, numerous shirts, some Sheetrock damaged and corner tape required fixing. Found this alarm/shut off switch on Amazon. Am working right now to test a catch basin that houses the dehumidifier so if an overflow occurs it sonically notifies us while turning off the dehumidifier. So far all the “mock-ups” have worked, water in the catch basin sets off the alarm as well as turns off the dehumidifer long before there is enough water to cause damage. The alarm sets off at 0.2 inches of water in a 5 inch deep catch basin. Plenty of leeway. Easy to install, connects to a single electric receptical. Pretty loud alarm, don’t know if I really need that because of the automatic shutoff.

### ⭐⭐⭐⭐⭐ A must-have for your washing machine!
*by X***G on December 20, 2025*

I recently repaired my washing machine and had little confidence about how well the repair would hold up, so I wanted an alarm to let me know if there were any leaks. This device does it all: 1. It has a sensor you place on the ground that detects water. It needs to be on a flat surface. It will detect water if the entire surface area below the sensor is wet, but it doesn't have to be a lot of water. Placing the sensor in a pan and dumping a cup of water in was enough to set the alarm off, so it is sensitive but won't falsely trigger. Think of it as a "puddle detector". Note if there is water near the sensor, but not under it, it won't trigger. So place it where you think water will most likely pool up. 2. It will sound an alarm that is loud, but not "wake the neighbors" loud until you push a button on the side to cancel the alarm. 3. It also TURNS OFF THE POWER to the device plugged into it! So for a washing machine where the water valve solenoids have to be energized to let water flow, they will get shut off automatically and the water will stop. That's exactly what I wanted! I think the cable from the main unit to the sensor is a little flimsy but once you set this thing up you'll probably never touch it again, so it's fine. I don't know if the power outlet on it is UL compliant, but if you are concerned about that you can still use this detector with nothing plugged into the outlet. In that case it will sound the alarm but won't turn anything off. I have a lot more confidence running the washing machine when I am elsewhere in the house knowing this alarm is monitoring the water situation. Highly recommended!

### ⭐⭐⭐⭐⭐ A "void your warranty" review!
*by C***G on January 8, 2021*

First, this does exactly what I need it to do. My washing machine drains into a tub that then needs to pump up a few feet to the sewer outlet pipe. As such I use a fine screen lint filter in the tub to avoid anything getting trapped in the pump. If this screen clogs up early in a load of laundry then during the final rinse and spin the tub could overflow. I've already had to mop up the basement a few times for this reason. This is the only product I have found that can sense for this spilled water and shut off power to the washer so it stops pumping out to the tub. In my tests it does exactly that. A bit pricey in my opinion for what it does, but if it saves me from needing anything more than a simple towel to clean up a tub overflow then I'll take it. There are some cons which I can live with. These have already been cited in other reviews: the smooth teardrop shape that can be difficult to grasp, the bulky size, the question of since when powered the relay is always on (this does allow for it to fail safe) will that reduce the life of the relay, and the need to remove power in order to reset the unit. As was noted in Roland Petit's answer to the question about shutting off or silencing the alarm, someone with a little electronics skill can bodge together a "reset" switch. Roland describes putting a switch on the transformer which I'm not a fan of as then you are dealing with a mod on the AC side of the circuit, something riskier than is necessary. I opened my unit to inspect it and found the logic us using an Atmel ATTINY44A microcontroller chip. Pin 4 of this chip is a reset that if brought low (grounded) will reset the chip. Conveniently there is a pinheader socket right nearby and two of the through holes are for reset and ground, conveniently both right next to each other. This is probably used for QA testing at the manufacturing plant. Wiring a momentary switch between these easily accessible solder points will provide you a much safer way to reset the unit, providing your mounting of the switch is well spaced away from the AC components. I've already done a workbench test of this and confirmed easy reset of the unit with these contact points. If I find a momentary switch that I feel I can mount acceptably then I will likely install that mod at that time. This unit has a 5-year warranty and it is minimal effort for me to unplug to reset, so I'm not in any rush to add this mod. THIS MOD SHOULD ONLY BE DONE BY PEOPLE WITH REASONABLE ELECTRONICS SKILL! FAILURE TO INSTALL PROPERLY COULD RESULT IN INJURY OR DEATH! NO QUESTION THAT THIS MOD WILL VOID YOUR WARRANTY! It is disappointing that for the price STAK Enterprises didn't have a reset switch already included as a part of the design. Another con that I found when I opened it up is that there didn't seem to be any strain relief in the main unit beyond the flex boot on the wire going to the sense puck. A good yank of the wire could pull it off the mainboard. Given the ample length of cable provided for the puck this probably isn't much of a worry, but while I had it open I still put a knot in the wire inside the housing that will take the stress if the wire gets pulled. One final note to keep in mind with the puck is that the two post contacts closest to where the wire enters the puck are the sense posts. The post that is opposite where the wire enters is just for making a 3rd leg to level the puck. I doubt it will really matter for anyone but if for some reason you want to sense for water directionally then have it facing with the exiting wire pointing towards the direction that you want detected first.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-01*