Control Duty Mercury Float Switch Narrow Angle B1 - B2 - Pear Shaped Bulb
Control Duty Mercury Float Switch Narrow Angle. • B1 Bulb (Std) Style Is 3.50” X 5.00” • B2 Bulb (Mini) Style Is 3.00” X 3.75” • Pear Shaped Bulb • Normally Open (N/O) - Yellow Bulb... For pump down applications • Normally Closed (N/C) - Red Bulb... For pump up applications • Single Pole, Double Throw (SPDT) - Blue Bulb... Normally Open or Normally Closed
Normally Closed (NC) Control Duty Mercury Float Switch
Normally Closed (N/C) – Red Bulb… For pump up applications.
The mercury switch de-activates (contacts open) as the float rises 1.00” or 5 degrees above horizontal.
B1 Bulb (Std) Style Is 3.50” X 5.00”
B2 Bulb (Mini) Style Is 3.00” X 3.75”

Normally Open (NO) Control Duty Mercury Float Switch
Normally Open (N/O) – Yellow Bulb… For pump down applications
The mercury switch activates (contacts close) as the float rises 1.00” or 5 degrees above horizontal.
B1 Bulb (Std) Style Is 3.50” X 5.00”
B2 Bulb (Mini) Style Is 3.00” X 3.75”

Single Pole, Double Throw (SPDT) Control Duty Mercury Float Switch
Single Pole, Double Throw (SPDT) – Blue Bulb… Normally Open or Normally Closed
For pump up or pump down applications. The float may be wired at installation to perform either operation but not both.
The mercury switch activates or de-activates (contacts close or open) as the float rises 1.00” or 5 degrees above horizontal.
B1 Bulb (Std) Style Is 3.50” X 5.00”
B2 Bulb (Mini) Style Is 3.00” X 3.75”

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