15700121 – Murphy Level Swichgage – EL150EX


The Murphy Liquid Level Swichgage EL150EX instrument is a combination liquid level gauge andlow limit switch; each unit includes (1) a chamber with pivotal float, (2) an indicating dial withpointer, and(3) a low-level contact. When properly installed and maintained, the float operates thepointer which, in turn, both indicates level during normal operation, and closes a switching circuit ifthe level falls to the low limit set point. The L150 features afield adjustable set point. The unit canbe mounted away from the engine for protection from vibration and extreme heat. The set point canbe adjusted at any time.The primary use of EL150EX is for engine cooling systems, surge or expansion tanks, condenserradiator or vapor phase systems, pressurized or atmospheric systems. The Level Swichgageinstrument can also be used to monitor lube oil, hydraulic fluid or diesel fuel reservoirs and activatealarms and/or shutdown at a predetermined minimum level. This instrument is built for low pressuresystems with a maximum of 25 psi (172 kPa) [1.72 bar].

Estimate available in 20 working days from Italy to Italy

This product may vary on delivery times, as factories do not guarantee production due to lack of raw materials.

Availability: Available on backorder SKU: 15700121 Categories: , Tags: ,



  • Indicating Gauge
  • Low Limit Switch
  • Float Operated
  • Monitors Level of Coolant, Lube Oil, Diesel Fuel and Hydraulic Fluid

Product specifications:

  • Part No.: EL150EX
  • Maximum Temperature: 250° F (121° C)
  • Maximum Operating Pressure: 25 PSI (172kPa)
  • Case: Sand cast aluminum, painted; approximate dimensions: 6-1/2 x 5-3/4 x 5-1/4 in. (165 x146 x133 mm)
  • Mounting Holes: (2) 5/16 in. (8 mm) diameter at 5-1/2 in. (140 mm) on center
  • Float: 304 Stainless steel
  • Lens:Polycarbonate
  • O-rings: Saturated Nitrile, are suitable for coolant or hydrocarbons.
  • Gasket: Nitrile
  • Vent Tube: 1/4 x 5 in. (6 x 127 mm) copper cane with 1/4 NPT x 1/4 in. (6 mm) tube fittingand 1/2 NPT to 1/4 NPT reducer fitting
  • Snap-Switch: SPDT rated 10 A @ 125 VAC;0.5 A @ 125 VDC; 10 A 30VDC
  • Shipping Weight:5lbs. (2.26kg.)
  • Laboratory Approvals: CSA Listed for Hazardous Locations Class I, Division 1, Groups C&D
  • Wire: Wired to terminal block
  • Shipping Dimensions: 6-1/2 x 6-3/4 x 6-3/8 in. (165 x 171 x 162 mm)

Product specifications:

Before freezing comes, check to be sure tour L150 or EL150 Series, coolante level switchage is filled with antifreeze solution the same as your engine block and radiator.

Hot to Order the singular parts are subject to separate quotation:

Parts NumberModel and DescriptionNotes
15700138All parts except case and bodyL150 Repiar Kits
15700135All parts except case and bodyEL150k1 Repair Kits
15000100Lens / switch assemblyEL150K1 Repair Kits
15000109Switch / terminal assembly
15000107Radiator fitting (PS), thin wall, 1/4 in. (6 mm) tube fitting
15010202Radiator fitting (PS-D), for diesel or oil, think wall (to 1/4 in [6 mm]), accepts 1/2 in. (13 mm) I.D. hose or 1/4 in. (6 mm) O.D. tubingAccessories
15010167Radiator fitting (PS Barbed), thin wall, 1/4 in. (6 mm) tubing or hoseAccessories

Additional information

Weight2,26 kg


15700121, EL150EX

Max Temp

121°, 250°

Maximum Inlet Pressure

25 PSI (172 kPa)


Approximate dimensions: 6-1/2 x 5-3/4 x 5-1/4 in (165 x 146 x 133 mm), Painted, San Cast Aluminium

Mounting Holes

(2) 5/16 in. (8 mm) diameter at 5-1/2 in. (140 mm) on center


304 Stainless Steel




Saturated Nitrile, are suitable for coolant or hydrocarbons



Vent Tube

1/2 NPT to 1/4 NPT reducer fitting, 1/4 x 5 in. (6 x 127 mm) copper cane with 1/4 NPT x 1/4 in. (6 mm) tube fitting


SPDT rating 10 A @ 125 VAC; 0.5 A @ 125 VDC; 10 A @ 30 VDC