NF CORPORATION is an electrical and electronic device manufacturer. The electrical measuring instrument business manufactures and sells filters, lock-in amplifiers, logarithmic counting rate (LCR) meters, signal pre-processing systems and frequency response analyzers (FRAs) and function generators. The power equipment business manufactures and sells simulation electric power supplies, direct- and alternating-current power supplies, bipolar power supplies, electronic load devices, guard relay testers and standard power generators. The custom applied equipment business manufactures and sells fuel battery evaluating systems, system interconnection testing systems and others. The electric components business provides various modules, such as filters, amplifiers and phase sensitive detectors. The others business provides maintenance and proof services.