That is a horrific event. My wife has left the gas of our stovetop on by accident, or had one of the burners go out when using a griddle, and forgetting to turn it off. Our stovetop is an old design the previous owners imported from Australia. No idea why. It's supposed to auto relight when the flame goes out, but we've seen that fail from time to time. Anyway, this makes a whole lot more sense than holding onto $60 CAD. Thanks for the reminder of what a dangerous situation gas leaks can cause.
That's a good price for a Zigbee enabled detector. Unfortunately it's not available to me in Canada. Previously, I would not have considered the Xiaomi detector because there's no HE driver at the moment, but now this is a no brainer with the Aqara Hub HomeKit edition I just bought. This sensor is supported by the hub. If anyone is interested in this, the Aqara Hub also goes back on for $40 US in the next 21 hours. That will give you alerts via HomeKit or if you add Homebridge to HE, you can get alerts there too. Also a nice doorbell and supplemental alarm. Even a bridge between other Xiaomi devices and HE via Homebridge/HomeKit automations. Have not had any reliability issues so far and the Homebridge integration from @dan.t makes it as fast and reliable as a direct to HE connection has been.
https://www.gearbest.com/access-control/pp_009984932110.html?wid=1433363
If anyone is interested, especially Canadian HE owners, I just ordered from here and used the discount code BGss6%xm for 10% off.
I'll also try pairing with HE and get a fingerprint. Maybe I can help @veeceeoh develop a driver. Keith, I have a Zigbee sniffer I've never used. Maybe I can figure that out and get you some info from it if that would help.