I am done dissecting these…. I will also revise my precious post/comments. I believe they use hot glue. Which is apparently a thing people do? Also people claim freezing hot glue helps it separate? Which it did not…. so it might be something else? Also the leads and solder joints might just not be cleaned? (“No clean” solder flux residue) Corroded leads look different…. but I am not sure how corroded leads look under hot glue? The matter what…. every time I need a sensor I try all my extras. Which never work.
I do know something…. Gin-San uses epoxy or some resin…. for some reason? Probably just to be…….. well it does not make their timer last longer. At least that is what I have seen and heard. Plus by their price of the timer and lack of features on some…. it adds money to the bottom line. In my opinion. 🙂 Like the GinSan GS-31 (Which I have 5-6 for sale if you want some! 🙂 ) why does it cost $400 new…. when you need another $100 timer?