压力开关是一种简单的压力控制装置，当被测压力达到额定值时，压力开关可发出警报或控制信号。压力开关的工作原理是：当被测压力超过额定值时，弹性元件的自由端产生位移，直接或经过比较后推动开关元件，改变开关元件的通断状态，达到控制被测压力的目的。

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The pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send an alarm or control signal. The working principle of the pressure switch is that when the measured pressure exceeds the rated value, the free end of the elastic element will generate displacement, directly or after comparison, push the switch element, change the on-off state of the switch element, and achieve the purpose of controlling the measured pressure.

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