Murphy DF Level Switch

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Murphy DF Level Switch

This simple level switch is highly reliable and can be worked into almost any new or existing system without major modification or special tools.

DF755 and DF757 are suitable for atmospheric tanks in a non-hazardous area. The SPDT snap-switch for the DF755 is preset for a 4 in. (102 mm) differential in liquid level. The DF757 trip point is adjustable over a 108 in. (2743 mm) differential.

Typical application is to start and stop electric driven pump(s) to maintain tank levels. It is also applicable to engine-driven pumps.

Technical Data

Murphy SKU:sc-5430 Category: Tag: Brand:

Available on backorder


For use in:

  • Saltwater Disposal Systems
  • Cooling Towers
  • Crude Oil Tanks
  • Waterflood Systems
  • Diesel Day Tanks
  • Sumps

Additional information

Weight1.9 kg

Snap Switch Ratings
15 A @ 125, 250 VAC
Case/Lid: Aluminum
Bottom Plate: Glass-filled Nylon
Process Connection: 1 NPT
Maximum Pressure Rating: 25 psi (172 kPa [1.72 Bar])
Conduit Connection (electrical): 1/2 NPT
RoHs Compliant
Shipping Dimensions: 6-1/4 x 6-1/4 x 6-1/4 in. (159 x 159 x 159 mm)