What kind of level gauge is this?
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This is the level switch on the separator. Is this a mechanical level gauge?
Float-type level gauge, a device used for two layered liquid media.
Haven’t used it! Similar to the float level!
Float-type level switch, digital low-low or high-high interlock 3OO2
At first glance, its appearance is very similar to that of Croni’s rotameter. It’s called a float, but the casings of Fisher/Foxboro/Magnetrol are not like this.
This thing was widely used in the 1990s; later on, double-flange types became more common.