Model MB 100 EXTERNAL CAGE VERTICAL LEVEL SWITCH
This is one of the most widely specified controls.  This is designed for control of specific gravity 0.4 above.  This level switch in its various models (MB100, 200, 300, 400) is used at working pressure ranging from vacuum to 3000 psi.  This switch is externally mounted & can be piped anywhere near the tank or a distance from it.  They are easy to install.  High & low levels are indicated on the outside of the switch. Fine adjustments can be made by moving the switch assembly up or down on the enciosing tube assuring exact liquid level control.

Several units can also be ganged for multi-level control.  Cooling fins can be provided for higher temperatures.  Explosion-proof housing is provided for the switch.

Operation : The float  in the chamber responds to the changing liquid level, raising or lowering the magnetic piston inside the enclosing tube.  Magnetic proximity switch or mercury switch is fastened to the external of enclosing switch & can be adjusted & locked at the desired actuating level.  Then (depending upon the application) the magnetic piston attracts or releases the switch.

Applications : This model is similar to the above models except that it is used for higher differential by providing two switch assemblies on the enclosing tube operated by a single float or two switch assemblies installed on the enclosing tube operated by double tandem mounted float.  A single switch can be used for both high & low level with large differential.