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Figure 1-2
1. Displacer chamber
2. Float, Buoyancy Measurement Element
3. Housing with 360° rotation
4. Magnetic switch assembly, micro switch and reed switch optional
5. Isolation sleeve
6. Magnetic rod, including magnetic steel
7. Fasteners, including bolt and nut washers
8. Head flange
9. Seal
10. Spring assembly
11. Displacer
12. Wire rope
2.2 Operating Principle
2.21 Classification of Displacer Level Switch
The Displacer Level Switch is divided into ball float type and displacer type based on the different
sensor elements. The ball float type is used in the working condition where the pressure is no more
than 6.3 MPa. The displacer type is usually used in the working condition that the operating
pressure is high or the top mounted alarm setting value is large. Refer to Figure 2 and Figure 3 for
the operating principle.
