The L150 Level Swichgage instrument is a combination liquid level gauge and low limit switch; the instrument includes (1) a chamber with pivotal float, (2) an indicating dial with pointer, and (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. The L150 features a field adjustable set point. The unit can be mounted away from the engine for protection from vibration and extreme heat. The set point can be adjusted at any time. The primary use of the L150 is for engine cooling systems, surge or expansion tanks, condenser radiator or vapor phase systems, pressurized or atmospheric systems. The L150 Liquid Level Swichgage instrument can also be used to monitor lube oil, hydraulic fluid or diesel fuel reservoirs and activate alarms and/or shut-down at a predetermined minimum level. This instrument is built for low pressure systems with a maximum of 25 psi (172 kPa) [1.72 bar]. Contact Rating: 2 A @ 30 VAC/DC. Die cast aluminum, poly-urethane coated case; brass float; polycarbonate lens. Wire is (1) 16 AWG x 26 in. (1.5 mm2 x 660 mm) with terminals.