Water Sensor Alarm, Smart Water Leak Detector for Home & Basements | Made in The USA | Automatic Flood Detectors and Water Alarm, Pure Water Capable (WaterWatcher)

This works perfectly for what I needed. I have a commercial dehumidifier and wanted a way to prevent water damage should the dehumidifier pump fail. This is an inexpensive solution. I tested it with 1cc of water amd the power was shut off immediately. Easy to install and a long cord for the sensor.

I searched for something like this for a while and contemplated making one of my own because I was having a hard time locating one. I eventually stumbled upon this one and decided to give it a shot. It works exactly as advertised! I use this device as a safety mechanism for a dehumidifier pump. My dehumidifier drains into a standard condensate removal pump. That pump then discharges the collected water up and out the washer machine drain pipe. All that works, and has worked, great for a long time. I started getting nervous that, if the pump ever failed, the dehumidifier would just keep draining away and I'd potentially have a huge mess on my hands. This device should alleviate that concern. What you do is plug the dehumidifier into this device, then place the sensor probe on the floor near the pump. If the pump were to fail, and spill water over onto the sensor, then the device would cut power to the dehumidifier and sound an audible alarm. The power would remain cut off, and the alarm sounding, until the sensor wall-pack was unplugged from the wall and then plugged in again.After setting up the device I tested it by pouring a little water on the floor. As the water moved towards the sensor contacts, the device immediately shut off the dehumidifier and sounded the alarm. I have to say I was surprised how little water it took to trigger the action.Unless it fails on me, I see no reason why to give this item anything other than five stars. I think it is a little pricier than it needs to be (probably should be about $50) but it does what I want. I may purchase another one for my second dehumidifier location.

It worked!!! My husband bought this in 2022 after a leaky pipe screwed up my floors and cabinets. It seemed to work ok when we tested it. Tonight, 3 years later, having practically forgotten about it, we heard a beeping and realized it was this detector beeping from under my dishwasher! And it caught it before there was any damage to anything. I don’t write reviews but since you really don’t know what you’re getting with these sort of things, I thought it was important to share. $80 was much cheaper than my insurance deductible and way less work than dealing with a kitchen demo. So worth it.

I'll first start off by saying my day job is an instrumentation and controls tech and 80$ is too much for this product. Should be more like 30-40$. That being said, this appears to be the only device on the market like this that will directly switch off a 120v source when water is detected. So if that's what you need, this product should work for you. Sadly after about a month and about 20 trip cycles (I was doing testing) the alarm now always goes into a trip one second after being plugged in. I tried cleaning the sensor in an ultrasonic bath, but no dice. I suspect the thin cable may have flexed itself apart internally due to my own movement of the sensor. I didn't continue to troubleshoot it as Amazon was willing to send a replacement as there is a 2yr warranty included. Thus why despite the device failing (safe) on me, I am still giving it 4 stars. If you get one of these, give it a check every now and again just like you would a fire alarm.For the techies: The sensor appears to be operating at a higher current than other resistive-contact-based water sensors I have seen, as when your hands are wet you can actually feel the current flow through the sensor's metal tabs. This should allow for higher accuracy of the sensing of water and reduce false high or low states as well it may work in distilled water.

Works great.

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.