More like these I'd guess : https://www.amazon.com/s?k=freon+gas+detector&crid=2NVKO7OF6XHRZ&sprefix=freon+gas+detector%2Caps%2C130&ref=nb_sb_noss

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better