SymCom load sensors measure current levels to determine feed rates, tool wear, loss of prime on pumps and many other types of overload and underload conditions. Littelfuse load sensors are useful as proof relays to verify that current is flowing, and are available with adjustable setpoints and trip or restart delays. SymCom’s load sensors are designed to be adaptable to many different applications. They utilize a CT (current
transformer) inside the unit to read the current of the equipment being monitored. SymCom Model LSR-0 is a selfpowered unit used as a proof relay. SymCom LSRX and LSRX-C units are also self-powered proof relays with either 0.25” fast-on connectors (LSRX) or depluggable connectors (LSRX-C) for use in OEM equipment. SymCom LSR-24, 115 and 230 load sensors require external power and are ideally used to help determine feed rates, tool wear, loss of prime on pumps, mixer viscosity and all types of overload and underload conditions. Littelfuse LSRU load sensors come in many different configurations, such as overcurrent and undercurrent or either overcurrent or undercurrent with variable trip, restart or extended restart delay settings. All LSRU models require 115VAC external power source, except for the LSRU-24-AL-2 and LSRU-24-AL-3, which require 24VAC.