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Horizontal Float Switch
Functional Safety Manual
M310/FSM, Rev AA
January 2012
PRODUCT
DESCRIPTION
Level Switch Purpose | Mobrey magnetic level switches are ideal for high and low liquid level alarm, overfill |
| alarm, and pump control duties. |
Figure 1.
Application Example:
High and Low Level Alarm
Operation Principle
The level switch is designed to open or close a circuit (“switch”) as a changing liquid level within a vessel passes the level of the float (the Switch Point).
When the process fluid level is below the Switch Point, contacts
When the process fluid level is above the Switch Point, contacts
Figure 2.
Level Decreases –
Float Pivots Downwards
Contact
Pushrods | N |
| s | N |
s |
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| ||
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| Float |
| Contact |
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| Magnet |
Float
6