Dwyer Instruments have released their new series SCS low cost current switches. The series SCS low cost current switches are suitable for monitoring whether fans, pumps, or motors are operating. The current flowing through the core of the device powers the circuit without an external power supply. All models have a built in solid state output and are easy to install. Optional LEDs and 10A relay modules are available. The series SCS is available in both split and solid core configurations.