FW Murphy LM500 Lube Level Maintainer

188.07 (excl. VAT)

The FW Murphy LM500 model maintains the crankcase oil level of an engine, pump or compressor. Adjusted to the correct running oil level, the LM500 will replenish oil as it is used. The low level switch will alarm and/or shut down the equipment if the supply oil is lost and the equipment continues to use oil.

  • Direct Mount (DM) capable
  • Eliminates under/overfill due to “human error”
  • See oil level and condition without shutting down
  • Simple installation
  • Automatically maintains lube level
  • Low level, 3-wire, snap-action switch
  • Positive sealing Thumb-Valve™
Murphy SKU:ex-9428 Category: Tags: , Brand:

In stock


Crankcase Balance Vent Connection: 1/2 NPTF (top)

  • Inlet Connection: 1/2 NPTF removable screen (side)
  • Outlet Connection: 2 x 3/4 NPTF (side), 1 x 3/4 NPTF (bottom)
  • Thumb-ValveTM 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). (Refer to 00-02-0735 Teflon Tape Wrapping Technique)
  • 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 solid green band for normal level indication
  • Maximum Inlet Pressure: 9.50 psi/25 ft. oil (head pressure)
  • Maximum Differential: 2 in. (51mm) between running and stopped
  • Maximum Ambient Temperature: 250o F (121o C)
  • Float: 304 Stainless Steel
  • Sales Bulletin              Installation Instructions        Bubble Lens Assembly Instruction


Additional information

Weight1.8 kg


Possible replacements and related products