Identify the termination and operation of an electric sensing edge with the Edge Tester by Miller Edge. With easy-read LEDs and alligator clips, technicians use MET-101 to determine the internal wiring configuration of a sensing edge for compatibility with the operator or to troubleshoot faults within a system. Unlike a multimeter, MET-101 can identify the proper function of a DC sensing edge. The Edge Tester is an ideal tool for all technicians installing or servicing motorized commercial doors or automated gates..