Review: ThirdReality Zigbee Water Leak Sensor with 120 dB siren alarm

@JustinB recently asked if these sensors work with Hubitat, so I bought one to test because they were on sale for $12.99 (the Amazon price is back up at $19.99 now).

This leak/moisture sensor comes with two AAA batteries and has a built-in siren that is supposed to be loud (120 dB). I think it is supposed to be ZHA 1.2 compliant.

The sensor is easy to pair with Hubitat. It pairs as a "Generic Zigbee Motion Sensor (no temp)".

After pairing, I changed the driver to "Generic Zigbee Moisture Sensor", and hit configure. Within a minute or two, the status showed up as dry (see below). It also provides an indication of battery life - I don't yet know if that is accurate, but no reason to believe it is not.

Dipping it in water immediately triggers it, and events show up correctly in Hubitat (see below).'

The siren beeps in "sets of 3" while it is wet and shuts off immediately when it is dry.

It is not 120 dB; probably more like 80 dB - still loud enough to hear.

Bottom-line, it works with Hubitat and is accurate. There is one major negative - the contacts are recessed by about 2 mm. That's a lot of water to build up before it gets triggered!

Also, as predicted by @SmartHomePrimer, submerging it in water for 5 minutes kills it - which seems like a bad design for a leak sensor. I'm drying it out overnight without the batteries; hopefully, it comes back life.

@mike.maxwell, here is the pairing fingerprint for this sensor. Could it please be added to the "Generic Zigbee Moisture Sensor" driver?


P.S. For anyone else interested, here is the Amazon link:


Nice! Takes one for the good of the community. I was just postulating. Didn't expect you to destroy it for proof. :joy:

Worth it for $12.99. Plus, let's see what spending O/N in rice does.

1 Like

Will be waiting patiently for your estimate on dB level while buried in rice...


That dB estimate was relative to the Aeotec Siren 6, which has a max output of 110 decibels. I can hear that anywhere in my house. I can hear this leak sensor's siren if I'm in the same room, and maybe the next room, but not if I'm 2-3 rooms away. Kind of like my vacuum cleaner.

I tested this sensor this morning after it had been in rice for 4-5 days. Still dead. I would not recommend its purchase. What's the point of a leak sensor that is killed irretrievably by water? :grinning:


I got one of these too. Seem to do just fine. The screws appear to be the water sensors, I simply backed-out my screws so they touched the ground. Yeah silly design for sure.. But the price is real nice.

Just to add my .02 I just went on a leak sensor buying spree after discovering water in my basement (from excess rain, no burst water pipes luckily) that somehow managed to just avoid the 3 other leak sensors down there.

I picked up one of these, alongside 4 Centralite models and my experience mirrors what was reported above. The alarm certainly seems no where near 120dB, I suspect I won’t be able to hear it outside the basement.

I also did this, so that the contacts are basically touching the ground.

I’ll report back if the device decides to fall off my mesh or I experience any other issue.

So what is the result? Did the sensor fall off? Got 1 in my cart now, debating......

So far so good. It’s still happily reporting battery status.


Download the Hubitat app