Water Leak Detector Sensor Alarm: Home Water Flooding Monitor Smart Sink Overflow Monitoring Adjustable Wet Moisture Alert Pipe Leakage Drip Detection Warning for Basement Floor (1 Sensor)

Works exactly how it's described. Comes with batteries and clear instructions to easy to set up. I purposefully chose this one to not have to have yet another wifi connected device. I tested on a damp paper towel and it went off. Very loud. I would use this somewhere you go by often enough vs in a storage closet in the basement with all the doors closed. Then you might not hear it. Nice and small for good peace of mind.

The note from one of the other reviewers about using the button to increase the volume was great. Tested it and was very loud. Seems like a great product.

easy to set up. The alarm works well.

Intended to detect water via sensors on the bottom of the unit. I tested the device by placing on a shallow pan, and pour a little water onto the pan. It immediately activated by 1-2 mm of water seeping under the device, and sounded a rated 100db alarm that cycled rapidly. There is also a test bottom, but without water, it tests alarm sound only. According to the short manual, the alarm is activated when "2 parallel metal probes" (there are 4 "metal feet probes") are in contact with water. This suggests that it detects a closed micro electric circuit when water "connects" 2 probes. The manual says 2 "diagonal" probes aren't activated, but given the translation to English, it is possible that the manuf means that it is ALSO activated when 2 diagonal probes are closed; don't really know, but given the small space among the probes, 1-2mm of water is a couple of tablespoon of water that will cover all 4 probes. By accident, I placed the sensor on a very damp towel, and the alarm also activated, suggesting that a micro-circuit was closed by the embedded water/moisture in the towel. That's a high sensitivity which may be a great feature, or annoying false alarms caused by condensation on surface which the device sits. 1. It comes with 2 AAA alkaline batteries, but I used my stash of Energizer Lithium that I expect to last 10 years if no water detection. If batteries are low, a pinging sound will occur and a flashing LED indicator under the cover that flashes through. 2. I've enclosed a photo of the inner body which has an impressive circuit board. It's not a simply device. The Blue triangle in the photo is to pry open the cover to insert AAA batteries. 3. It is IP66 rated which I haven't Google, but assume it's resistant to water intrusion, and water tight for a few minutes of water exposure. 4. Because of IP66, the body cover is quite tight, and a prying tool is provided; the prying tool will scar the opening slot, but won't damage the inside. The 2 AAA batteries are inserted. 5. I've read other reviews about "pairing." I ve no idea what they mean as this is a $10 device without WiFi or Bluetooth capability. This device is a used anywhere where a possible water leak can occur, like under the kitchen sink, etc. My use is for my Central AC condensate overflow while I go about installing a float switch to shut-off the AC if the condensate drain is clogged, and the condensate pan overflows. Even after I install a float switch, either a SS1 or SS2, this sensor is good backup, but maybe it can be annoying if it is overly sensitive to possible condensation under the device body. Recommended highly. There seems to less cheaper ones, but I decided that $10 would give me a better device than the $6 ones.

Works great! I have a closet with my AC unit and water heater on top of each other and was told to get one of these after a neighbor had an issue with a leak they didn’t notice and had to spend thousands on repairs due to the water damage caused to the downstairs neighbor. Wouldn’t you know it! A few months later my AC drainage pipe gets clogged and the AC water starts to drip down into the water heater. I have one of those plastic rims under the water heater so most of the water accumulated in there and made the alarm go off. It was sooo loud. It was in the middle of the night and I was in my bedroom on the other side of the apartment with the door closed and I could still hear it! Best purchase ever!

Pretty amazing product. It can be used repeatedly unlike some other products listed. Works by conduction with water and making a circuit between the “terminals?”

Great little water sensing alarm. I purchased this model because it has the drip sensor and the wet floor sensing modes. I am using this behind our portable air conditioner. Last year the drainage tube leaked and caused hundreds of dollars worth of damage to our floor. Which could have been prevented with this cheap alarm. Every house should have these under every sink and near their AC units. Anywhere you have water draining in your home. The alarm is LOUD and the device is simple to use.

It worked perfectly. I just installed an under the sink RO water filter system and placed the detector under the sink and sure enough, it detected drips and sounded. It's perfect!

Just arrived. I tested it, it does sound when water touches its sensors. Very loud alarm for my apartment, but not sure if it is loud enough if you place it in an American-style house basement. Edit: It has since consistently worked for my leak. Loud alarm every time, good product

It's just what I needed for my basement it works...what more can I say!

Fait très bien le travail mais n’est pas connecté au wifi ou à quoi que ce soit donc il faut être sur place pour entendre sonner. La sonnerie est très forte c’est un avantage

No floods yet. seems quite simple.

I held off on reviewing this as I hadn’t had a water leak yet. Our washer has leaked twice in the past year which was what prompted me to purchase this alarm. Yesterday the alarm sounded when I had a load of laundry in, and sure enough it was leaking water. I was very happy to be able to address the problem quickly without my basement flooding or the water causing any damage.