Murphy Level Switch LM2000

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Replaced by FW Murphy LM500

Murphy LM2000 model maintains the crankcase oil level of an engine, pump or compressor. Adjusted to the correct running-oil-level, the LM2000 will replenish oil as it is used. An integral, low-level switch will alarm and/or shutdown the equipment if supply oil is lost and the equipment continues to use oil.

Technical Data

Murphy SKU:sc-5422 Category: Tag: Brand:

Available on backorder


Experience hassle-free oil level maintenance with the LM2000 system! As the crankcase oil level decreases, the LM2000 float opens the nonclogging Thumb-Valve™, enabling a smooth oil flow from the supply tank to the crankcase. Once the optimal level is reached, the float triggers the Thumb-Valve™ to close, preventing overfill.

Key Features:

  • Prevents under/overfill due to “human error”
  • Allows continuous oil level monitoring without shutdown
  • Easy installation
  • Automatic lube level maintenance
  • Equipped with a low-level, 3-wire, snap-action switch
  • Positive-sealing Thumb-Valve™
    Note: Not intended for use with fuel. Keep your system running smoothly with LM2000.

Additional information

Weight2.5 kg

Murphy LM2000 LM2000S



Crankcase Balance Vent Connection: 1/2 NPTF (top). Inlet Connection: 1/2 NPTF removable screen (side). Outlet Connection: LM2000 3/4 NPTF (bottom) LM2000S 2 x 3/8 NPTF (side) 1 x 3/4 NPTF (bottom) Thumb-Valve™ Material: Viton. Snap-switch: SPDT rating 10 A, 125 VAC; 0.5 A, 125 VDC; 10 A, 30 VDC. Wire leads: 18 AWG x 14 in. ± 2 in. (355 mm) length. Conduit Connection: 1/2 inch conduit (female, top). Case: Die cast aluminum Lens: Clear “Frog Eye” non-staining, high impact, high temperature polycarbonate; UV and heat stabilized. Dial: High visibility white background with green and white “index” lines for normal level indication. Maximum Inlet Pressure: 9.50 psi/25 ft. oil (head pressure). Maximum Case Pressure: 15 psi (103 kPa). Maximum Differential: 2 in. (51 mm) between running and stopped. Maximum Ambient Temperature: 250°F (121°C). Float: Brass Flow Rates: SAE 40 motor oil @ 32°F (0°C) with 2 ft. head pressure: 0.5 GPH Dimensions: Overall 4-5/8 inch tall x 2-7/8 inch deep. For exact dimensions, refer to document “00-02-0423 LM2000 Installation Instructions”. LM2000/LM2000S Shipping Dimensions: 9 x 5-1/2 x 6 in. (229 x 140 x 152 mm).


Possible replacements and related products