Murphy EL150K1 Level Switch

The L150 Series Level Swichgage® instrument is a combination liquid level gage and low-limit switch; each unit includes:

(1) a chamber with pivotal float

(2) an indicating dial with pointer

(3) a low-level contact.

When properly installed and maintained, the float operates the pointer which, in turn, both indicates level during normal operation and closes a switching circuit if the level falls to the low-limit set point.

Technical Data

Murphy SKU:sc-5419 Category: Brand:

In stock


The primary use of the L150/EL150K1 is for engine cooling systems, surge or expansion tanks, condenser radiator or vapor phase systems, pressurized or atmospheric systems. The Level Swichgage® instrument can also be used to monitor lube oil, hydraulic fluid or diesel fuel reservoirs and activates alarms and/or shut down at a predetermined minimum level. These instruments are built for low pressure systems with a maximum of 25 psi (172 kPa) [1.72 bar].

Additional information

Weight1.7 kg

Maximum Temperature: 250° F (121° C)
Maximum Operating Pressure: 25 PSI (172 kPa)
Case: Die cast aluminum, polyurethane coated; approximate dimensions; 5 x 4-3/4 x 2-3/4 in. (127 x 121 x 70 mm)
Enclosure Rating: IP35
Mounting Holes: (2) 9/32 in. (7 mm) diameter at 4-1/2 in. (114 mm) on center
Float: Brass
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 fitting
Snap-Switch: SPDT rated 10 A @ 125 VAC; 0.5 A @ 125 VDC; 10 A 30 VDC
Wire: (3) 18 AWG x 14 in. (1 mm 2 x 356 mm)
Shipping Dimensions: 5-1/4 x 5-1/4 x 5-1/2 in. (133 x 133 x 140 mm)