“What does “primary instrument” mean for a “level switch”?
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====== “What does “primary instrument” mean for a “level switch”? ======
A level switch, also known as a water level switch or level sensor, is, as the name implies, a switch used to control the liquid level. In the production process, measuring instruments are often classified qualitatively based on the number of times of energy conversion: those that convert energy once are called primary instruments, while those that convert it twice are called secondary instruments.