Great Gas detector found

Hardware
1

Recently found these 433Mhz gas detectors on Aliexpress:
https://www.aliexpress.com/item/1005005032820588.html?spm=a2g0o.order_list.order_list_main.5.668c1802FgFo05

Didn’t even know they existed. 433 to get around the usual cloud reliance, but to my surprise they have wifi as well and are supported by the Tuya app. Also, you can add them as a detector if you have a 433/wifi alarm system (like the Digoo tuya system), that way it will call you if there is a gas leak.

But the best part is, they are actually working and sensitive (unlike Shelly or the Aqara sensor, i wouldn’t trust my life with those) and show the LEL on the front screen. I have it sitting a bit above and next to the gas hob, and it works very fast. Tasmota picks up the RF code on a Sonoff RF bridge right away, i trigger on both the tuya for picking up the PPM (i do above 1% PPM) and a binary mqtt sensor for if the gas alarm has been triggered (10% LEL on the tuya app), that way i’m not worried about internet not being there.

This way i have: internet, 433mhz for HA notifications, and linking it up to the alarm system i have GSM calls as well.

I am testing a few out, but so far this one has been the best and i’m thinking of getting a few more to cover other potential gas leak sources as well. I don’t know why but so far the cheap Tuya made ones are often very quick to react. It’s just that in the past i used the Wifi only ones, which are obviously relying on their cloud integration (if using in HA, they will still work and alarm without cloud (i hope/assume).

Also: they work with a usb cable as opposed to the Shelly plug (needs a socket, and is useless anyway) or the Aqara, which has their own proprietary plug).

2

this is a great find. Thanks for sharing! Been looking for something to detect when cooking starts.

When you compare against Aqara, which one are you referring to? I was eyeing this newer model, so it’d be interesting to see which one responds faster:
https://www.aliexpress.us/item/3256804202881125.html?gatewayAdapt=glo2usa4itemAdapt

3

Yeah, that’s the one i have as well. It’s useless. I think i’m going to power both of them off soon and add some more of these instead. I don’t think the Aqara ever has gone off. Same as the shelly, it might just be that their thresholds are super high but i need extreme sensitivity.

It still works great and i so sensitive that when my other half holds down the gas know a bit too long it will immediately set off.

1 Like
4

Hi

While searching for gas detector devices and sensors, I have found your post from may 2023. Your description looked promising and bright, so I decided to buy this device.

I want to run it in local-only mode (no cloud please). I see it works with Tuya mobile app for testing purposes, but this is not what I want.

Can you please describe how you were exactly integrated this gas detector into HA? By searching around, I cannot find any meaningful traces, and those 2-3 3rd party hacks for local tuya integrations are not referencing this device.

The sencence “433 to get around the usual cloud reliance” is a bit enigmatic to me, I will like to know what was your way to do it. Thanks.