The CS‑650 Series current sensors monitor line current for electrical loads such as pumps, conveyors, machine tools, or fans and output a 0‑5 Vdc signal to represent the load current. The CS‑650 require no external power as they are totally powered by induction from the AC line being monitored. The sensors are typically used to monitor motor operation and can be used to determine motor failure, belt loss, machine feed rates or tool wear.