A Silicon Valley based tech company has designed a high precision sonar rangefinder:
Amazon product page
As you can see, it’s 0.1 mm accuracy and builtin temperature compensation (the temperature sensor can also be read to get ambient temperature) is quite cool. But the maximum range is not too large at 1500mm (not too bad though)
Granted its pricing matches the TF02, that can be worked on, maybe bought down a bit later.
I want to know whether people are interested and if I should start working on a PR.