pretty good can test with a lighter.
but you have to have an outlet within a few feet from ceiling for natural gas as it rises.. i belive lp goes down so you plug in near floor.
there is no acuurancy as it is not measuring numbers it goes off like a smoke detector and in fact in alarms as smoke..(with this driver)
However, he hubitat default driver. alarms as gas but since there is no gas detection capability it is not that usefull as you would have to write custom rules..
That is why i added the gas/detected/clear to this driver to be like the default hubitat but also why you need this custom driver so it can alert like smoke and you can use HSM (Hubitat Safety Monitor) like normal..
Here is my latest driver a combination of the above one and the older one i ported from smartthings.. it should work for the older 1.2 ha and newer 3.0 ha zigbee as i have both now for testing.
Also, if you search for homi or heiman on hubitat package manager it should come up as my driver I ported from smartthings (that this is a newer version of) has been on there for years.
Cool...so for my water heater in garage, I could position this above the water heater (have a plug nearby for hot water pump). Does it have to be directly above the heater (centered over the heater) or can it be on a wall next to the heater (about 4" from the heater itself) near the ceiling?
No. It’s just better to place it higher up since natural gas is lighter than air, as @kahn-hubitat mentioned, so it will take more time for the concentration to get to the detector’s threshold if it’s positioned lower down. The opposite is true for liquified petroleum gas.
on the older version of this device i can set the check in time and it works fine i have tested 2 minutes 10 minutes 30 minutes and an hour and it works.
on the newer 3.0 ha version i can set it say to 2 minutes ofr 5 minutes and it works.. anything up to 1/2 hours.. so i know the parameter is working.. sometimes it takes one report before it settles on the 2nd report on the new time span,]
however, setting it to anything over 1/2 hour does not work apparently for that version 1/2 hour is the max.
i wish heiman would document the parameters and ranges somewhere. i cannotfind any documentation other that setup and the lights.
I first turned off my natural gas water heater, flame out.. then held the device directly over the tube the gas comes out while holding Pilot light button.. it did not alarm...
So i decided to go over to my brother's house with a natural gas stove... he did a test without flam and still no alarm..
Thanks for the additional info.
Based on how these detect LEL, test 1 seems unlikely to succeed.
And for test 2 did you use some sort of enclosure to contain the gas?
Without one you might not raise the concentration long enough for the detector to work.