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Fisher
™
2100 Pneumatic and 2100E Electric
Liquid Level Switches
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Specifications 2...............................
Educational Services 4.........................
Installation 4..................................
Hazardous Area Classification Information
and Safe Use Instructions 4...................
Installation Procedures 6.......................
Common Procedures for Either Switch 6.......
Additional Procedures for 2100 Switch 6......
Additional Procedures for 2100E Switch 7.....
Calibration Check 8............................
Principle of Operation 9.........................
Maintenance 10................................
Operational Test 10............................
2100 Switch Maintenance Procedure 12..........
2100E Switch Maintenance Procedure 13.........
Parts Ordering 14...............................
Parts Kits 14...................................
Parts List 15...................................
APPROXIMATE
SWITCHING POINT
Figure 1. Fisher 2100 Pneumatic Liquid Level Switch
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the 2100 pneumatic and 2100E
electric liquid level switches. Refer to separate instruction manuals when you require information regarding related
valves, actuators, positioners, and accessories.
Do not install, operate or maintain a 2100 pneumatic or a 2100E electric liquid level switch without being fully trained
and qualified in valve, actuator and accessory installation, operation and maintenance. To avoid personal injury or
property damage it is important to carefully read, understand, and follow all of the contents of this manual, including
all safety cautions and warnings. If you have any questions about these instructions, contact your Emerson sales office
or Local Business Partner before proceeding.
Instruction Manual
D200119X012
2100 and 2100E Liquid Level Switches
June 2017
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