My tank came with a mounting point on the top of it where you can fit an ultrasonic sensor. You just configure it with the depth of your tank and that’s it. I have a unit inside that shows how much oil I have left.
Apparently, it uses an RF protocol that can be intercepted and interpreted in HA with the right dongle but I haven’t done that.
Edit: mine looks like this although with different branding.
This is very unprofessional of redgifs. If you have an API you should make it stable. If you have to release a breaking change then you should create a new version of the API and support both versions for a while.
I’m on iOS and use Avelon which also can’t currently view redgifs content.