Data Sheet

2100 and 2100E Level Switches
D200032X012
Product Bulletin
32.2:2100
February 2014
5
Figure 4. Construction Details of Fisher 2100E Switch
CAGE
DISPLACER
ELECTRIC
SWITCH ASSEMBLY
TORQUE TUBE
ASSEMBLY
SWITCH ARM
GE59290
40B6593
Figure 3 shows a sectional view of the 2100 switch
positioned for low level activation. The nozzle, flapper,
and magnet are on the opposite side of the torque
tube, so that downward displacer travel moves the
flapper away from the nozzle.
With the 2100E switch (figure 4), rising liquid level
exerts a buoyant force on the torque tube that either
activates or deactivates an electrical SPDT or DPDT
switch depending on the switching action desired.
Falling liquid level deactivates or activates the same
switch depending on the action desired.
Installation
The forged‐in horizontal line on a 2100 or 2100E
displacer cage indicates the approximate switching
point. When mounted, the 2100 or 2100E switch is
positioned so that the horizontal line corresponds to
the level at which switching is desired. Isolating valves
should be installed in the equalizing piping between
the tank and the cage. Dimensions are shown in figure
5 and table 1.
Ordering Information
Application
When ordering, specify:
n Supply pressure (2100 switch only)
n SPDT or DPDT switch construction (2100E switch
only)
n Maximum working pressure and temperature
n Switching action for high or low level alarming
Construction
Refer to the specifications. Review the information
under each specification and in the referenced figures;
specify the desired selection whenever there is a
choice to be made. High level switching and
right‐hand mounting will be supplied automatically
unless otherwise specified. Always specify the
complete type number of the desired equipment.