Liquid Level Controllers
The pneumatic level controllers sense the level of a liquid or a liquid-to-liquid interface, compare the level with a desired value (set point) and produce a pneumatic signal that can operate an actuator control valve. By operating an actuator and valve, the controller maintains level at a value around set point.
 | Fisher 2500 pneumatic level controllers are rugged, dependable, and simply constructed pneumatic instruments. |
 | Fisher L2 and L2sj rugged liquid level controllers use a displacer type sensor to detect liquid level or the interface of two liquids of different specific gravities. |
 | Fisher L3 pneumatic level controller is designed to sense liquid level or interface level in a vessel, and produce a standard pneumatic output signal proportional to the process variable. |
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