Line-Sensing Thermostat, Double Pole Double Throw, 22 Amp, 125/250/480 Volt. The nVent RAYCHEM E507S-LS2 thermostat is designed for controlling heat-tracing systems in hazardous locations. The E507S-LS2 senses pipe or tank wall temperatures and can be used to control a single heat-tracing circuit or as a pilot control of a contactor switching multiple heat-tracing circuits. It can also be used to indicate low-temperature or high-temperature alarm conditions Can be used to control heat-tracing circuits in a pipe-sensing mode (see Figure 1 on back page), to indicate low-temperature (see Figure 2) or high-temperature (see Figure 3) alarm conditions, or to control the coil on a contactor (see Figure 4). Class I, Div. 1 and 2, Groups B, C, D. Class II, Div. 1 and 2, Groups E, F, G. Class III.