It's believed that many customers have encountered common problems about the use of micro switch, and many people do not know how to deal with them. Besides, they don't have the basic knowledge of micro switches. Let's first explain the common problems about the use of micro switches, and understand it together.
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First, maybe the dust adheres to copper sheet, or switch contact, which is recommended to use sealed electric switch. The second is that in the natural environment, the malignant gas damages it, resulting in the formation of insulation performance covering film on the joint surface. It is recommended to use the switch with the joint raw materials (gold, aluminum alloy, etc.), which has a good adaptability to the natural environment.
There are many reasons for this problem. First of all, may be due to poor contact; second, may be melted contacts; third, may be damage to torsion spring in internal structure; fourth, may be different operating speed; fifth, may be operating process frequency; sixth, may be adhesion of waste, dust. All in all, the actual reasons must be checked.
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First, the key to the aging and ablation of the micro switch is that the load volume is large, which then leads to arcing, so the joint floats around. This can be avoided by switching loads on car relays and AC contactors. Secondly, the ambient humidity is too high, resulting in a significant change in the nearby temperature, leading to the infiltration of water droplets and the increase of carbonization of insulating layer. In wet and cold natural environments, try to avoid the long-term presence of micro switches, or use sealed switches.
It's believed that you have read the above FAQs for the use of micro switch and also have an understanding. If you have more questions, you can consult Unionwell, we do hope to help you.
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.
Any suggestions?
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