increase the resistors by a factor of 100 or so and add a very small cap across the lower one. The cap inside the ADC is absolutely tiny, pF at best. So a 100nF cap would easily do the trick and supply the voltage as required.

Interesting. I decided to look at reviews the usual way if I was going to use one of the company’s. Chose “mr emergency” and pretty much 4.6 out of 5 from just the google search. Drilled down to product review and it looks pretty good, too good, suspiciously good in fact.

https://www.productreview.com.au/listings/mr-emergency-plumbing#reviews

Check on the “people” giving these reviews and they all have a single review and every one reads like it was professionally written. AI perhaps ?

Go to the 1 star reviews and suddenly it’s a different picture.

https://www.productreview.com.au/listings/mr-emergency-plumbing?rating=1

Good lesson, thanks for the heads up.