Check the listing for details. Lot: 2 Progressive Electronics Inc. Model 88 Load Coil Detectors. Condition: Used. Listed at 12.00 USD. Lot of two. The image shows a Progressive Electronics Inc. Model 88 Load Coil Detector. This device is designed for use in telecommunications to identify and count load coils on active or inactive circuits. It simplifies the process of troubleshooting dedicated data circuits by providing a clear indication of each detected coil. The Model 88 can accurately identify and count up to four load coils on a circuit. It is available for purchase from various online retailers specializing in telecommunications equipment, such as Comtrade Store and Metro Systems.