Detect switches, also known as limit switches and sensor switches, are commonly used low-current master control electrical devices. I. Working Principle The working principle of a detect switch is based on the opening and closing of circuits. When the switch is in the closed state, current can pass through smoothly, and the circuit is in a conductive state. When the switch is in the open state, current cannot pass through, and the circuit is in a disconnected state. The detect switch senses changes in parameters within the circuit, such as current, voltage,