It’s going to take a few hour a week for 2-3 months to figure this all out.
Why do I have such a hard time trying to post items with links into forums???
CONTEC is one of the major brands and they are generally low cost and work with OSCAR\Sleepyhead. I don’t seem to able to copy the name and link, I also have more specifics such as price and some features
CONTEC items that have oximeter or can have attachment with one and record. I have some emails going to CONTEC to clarify some features.
FYI, Amazon has 700 items under pulse oximeter and generally what is needed is one that can record and there are many with different price ranges, some with WIFI or cables or their own software, some work with OSCAR\Sleepyhead (free software) some don’t. I am going to go through all of them to find brands that make recording meters and then I am going directly to their websites to get the features and links for all products they carry that record.
Also, if you really want choices and low prices to go a market that is bigger and more direct; https://www.alibaba.com
search pulse oximeter there and you will get thousands of results, often for 50% less. Once I have Amazon done, I will “scan” for some the the top hits and see if I’ve missed any manufacturers that make low cost <$200, pref inder $50 recording sensors.
Going to Alibaba normally requires you to purchase quantity. Ali Express may be a better option, although most of the ones you see on Amazon are from China anyway I still feel better ordering electronics from Amazon instead of Alibaba or Ali Express.