I have a EDMI U8 gas meter (common for Australia)
And need to find a way to monitor the gas usage. There is a rotating metallic object on one of the plastic gear cogs, which I originally thought was magnetic but after buying several types of reed switches and testing them, I have concluded the object on this cog is not magnetic but a piece of metal.
So what I need to figure out is what electronic component do I need to get in order to record 1 full rotation of this gear cog?
I stumbled across this thread a while later, so sorry for resurrecting it, but probes like these are used to detect the beds of 3D printers for levelling, and if your material is conductive, and it’s within 5mm of the bottom of the housing, it may be able to pick it up:
Woah, oh boy! So I’m not the only one trying to do this.
I’ve had similar discussions on the home assistant community forums.
I haven’t had success yet, but my next attempt is to try a Hall effect sensor. I picked up one plus an arduino/esp board at Jaycar and plan to test if i can get a measurement via that. Though the sensor i bought has a preset threshold and binary (on/off) output. But there are others that just report the analog value - which may be needed if the blips of the metal disc passing by are too feint.
Of course I’d love to know if you’ve got anywhere in the 6 months since this post!
Check these links below from two of the threads I’m following. One has a user in the UK with a similar meter but his has a magnet instead of the metal disc (model U6P)