Motor & Pump Rotation TesterThe motor rotation tester indicates magnetic fields and rotation direction for certain motors and circulating pumps. Place the indicator at the motor center. The red-white disc rotates in the same direction as the pump when the motor is running.AC Detector ToolThe AC indicator tool detects magnetic fields from AC sources (e.g. solenoid valves, transformers, etc.). Place the indicator close to the AC device. The red-white disc rotates when the device is active.The indicator isnow equiped with an LED flashlightto provide additional lighting when needed.