METAK 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 (2 Sensor)

I use this water leak detector to prevent any risk of leaks at home, and it completely meets my expectations. l'm already familiar with the quality of this brand's products, and it didnot disappoint! It works perfectly. The detection is very sensitive, and notifications arrive quickly on my phone, which is reassuring even when l'm not at home. Thanks to its compact design, installation is super easy, and the long-rangeconnection allows it to be placed in remote areas without losing signal. The sound alarm and instant notifications give you total peace of mind. I highly recommend this device for itsreliability and efficiency. Its water resistance and this smart sensor works excellently well .

Great product. The alarm is very, very loud when tested. I am using this item behind my refrigerator by the ice maker line.

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.

These are the perfect leak detectors, inexpensive, long battery life, small form factor, loud alarm signal, low battery alert signal. Putting one under every sink, one behind your fridge, one under the washer and one behind every toilet is cheap insurance. knowing you have a leak early can save you thousands of dollars.

I just had bad accident from open sink while I was sleept and trying not to again. It is excellent devise, have very high sound with smaller size to put it everywhere.

Works great. Is affordable. The alert is VERY loud and continues until you manually stop it.

I’ve had a 60-gallon reef tank for almost two decades, which means I regularly mix fresh saltwater very other week. I always set a timer to warn me when my salt mix bucket is about to overflow, but sometimes the water fills at an unpredictable rate, and I’ve ended up with mini floods in my kitchen more than once. So, I finally decided to get a water leak sensor.At first, I looked into smart sensors that connect with Apple Home or Samsung SmartThings, but they were pricey ($35+), had non-replaceable batteries, low audio alarm, and had frequent complaints about disconnecting from the system. Instead, I went with a simple, battery-powered water sensor, and I’m so glad I did!This device is not only loud but also incredibly accurate. The moment even a tiny part of its foot touches water, it sets off a piercing alarm (and I mean LOUD. I can hear it from several rooms away). Best of all, it’s a straightforward device with replaceable batteries, and I can even use rechargeables. No complaints whatsoever, and for this price, I can’t recommend it enough!

I bought this because I often overflow my kitchen sink. It is a lot of work to clean the mess. This alarm only works sometimes. It is hit and miss. I re read all the instructions and the troubleshooting. I couldn't find any specific reason why it only works sometimes. I'm grateful when it does work. For the price, I won't bother sending it back.