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What are the disadvantages of magnetostrictive displacement sensor?

Hehe, it's funny to see the comments upstairs. In fact, magnetostrictive liquid level gauge also has its shortcomings!

1, the anti-interference ability is slightly poor (generally, places with strong electromagnetic radiation such as power plants are not recommended)

2. It must be contact measurement, but the real measuring unit is not in contact with liquid, only its protective tube is in contact with liquid.