I’m developing a sensor device that can be installed in swimming pools and will ordinarily be operated near the waterline (so either possible shallow immersion from time to time, or constant shallow immersion < 10 cm / 4").
I’m looking for an Off/On switch suitable for this application. Typically the switch will only be operated twice a year, for winterization and spring.
During installation, a user may accidentally drop the device in the deep end of the pool, so should also be able to withstand say <2.5m/9’ water depth for 30 minutes.
Most of the device will be potted in an epoxy.
AND, ideally would like a solution that will cost under $1-$2.
At one point I was using a reed switch, but at ~$4.50 found it expensive, plus the cost of pairing a magnet with it, and figuring a secure way to keep the magnet in place with the device remaining in the water seemed like a less than an ideal user solution.
I can only find a few waterproof switches listed on Digikey and many of them quickly get up into extremely high prices!
I feel like I’m missing something. Maybe I need more of a rubber seal instead of a sealed switch.