On rainy and humid days, the touch switch light in the corridor will always be on. What is the reason?

At present, the mainstream technology of touch sensing panel is realized by capacitive sensing technology. Because the capacitance change brought by fingers on the induction disk is very small, with the increase of the thickness of the insulation panel, the capacitance will decrease exponentially. After passing through tempered glass of about 5mm, the touch of human fingers can only bring capacitance change less than 0.5PF, which will have great influence on such a small measurement, such as humidity, temperature change, electromagnetic interference, power interference and so on. If your touch switch appears this phenomenon in wet weather, it can be considered that the quality of the switch is not good. Wet environment test should be carried out when purchasing. Test method: steam the touch-sensitive panel to be tested until the panel is covered with dew. Observe for error-free operation or slow response.