Electrical and Magnetic Measuring Instruments are specialized equipment categories for accurately measuring and monitoring electrical and magnetic characteristics in manufacturing environments. This includes measurement devices for electrical parameters such as voltage, current, resistance, insulation resistance, and grounding resistance, magnetic property measurement equipment for magnetic flux density, magnetic field strength, and permeability, power quality analyzers, and insulation diagnostic devices. These are essential measurement instrument groups for quality control, equipment maintenance, safety management, and research and development in manufacturing industries, capable of high-precision measurements compliant with JIS and IEC standards. They are clearly distinguished from physical quantity measurement devices for temperature, pressure, and flow rate, as well as dimensional and shape measurement instruments, representing an equipment classification specialized in quantitative evaluation of electrical and magnetic phenomena.