NAICS 334515 — Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals 
BEA sector: Electricity and signal testing instruments manufacturing
Activity: Alternator and generator testers manufacturing
Activity: Ampere-hour meters manufacturing
Activity: Analyzers for testing electrical characteristics manufacturing
Activity: Audiofrequency oscillators manufacturing
Activity: Audiometers (except medical) manufacturing
Activity: Automotive electrical engine diagnostic equipment manufacturing
Activity: Battery testers, electrical, manufacturing
Activity: Bridges, electrical (e.g., Kelvin, megohm, vacuum tube, Wheatstone), manufacturing
Activity: Circuit testers manufacturing
Activity: Communications signal testing equipment
Activity: Current measuring equipment manufacturing
Activity: Decade boxes (i.e., capacitance, inductance, resistance) manufacturing
Activity: Demand meters, electric, manufacturing
Activity: Digital panel meters, electricity measuring, manufacturing
Activity: Digital test equipment (e.g., electronic and electrical circuits and equipment testing) manufacturing
Activity: Diode and transistor testers manufacturing
Activity: Distortion meters and analyzers manufacturing
Activity: Elapsed time meters, electronic, manufacturing
Activity: Electrical network analyzers manufacturing
Activity: Electrical power measuring equipment manufacturing
Activity: Electricity and electrical signal measuring instruments manufacturing
Activity: Electricity and electrical signal testing equipment manufacturing
Activity: Electron tube test equipment manufacturing
Activity: Electronic test equipment for testing electrical characteristics manufacturing
Activity: Energy measuring equipment, electrical, manufacturing
Activity: Field strength and intensity measuring equipment, electrical, manufacturing
Activity: Frequency meters (e.g., electrical, electronic, mechanical) manufacturing
Activity: Frequency synthesizers manufacturing
Activity: Function generators manufacturing
Activity: Galvanometers (except geophysical) manufacturing
Activity: Graphic recording meters, electric, manufacturing
Activity: Ignition testing instruments manufacturing
Activity: Impedance measuring equipment manufacturing
Activity: Indicating instruments, electric, manufacturing
Activity: Instrument shunts manufacturing
Activity: Instruments for measuring electrical quantities manufacturing
Activity: Instruments, electric (i.e., testing electrical characteristics), manufacturing
Activity: Integrated-circuit testers manufacturing
Activity: Integrating electricity meters manufacturing
Activity: Internal combustion engine analyzers (i.e., testing electrical characteristics) manufacturing
Activity: Kelvin bridges (i.e., electrical measuring instruments) manufacturing
Activity: Laboratory standards testing instruments (e.g., capacitance, electrical resistance, inductance) manufacturing
Activity: Logic circuit testers manufacturing
Activity: Measuring equipment for electronic and electrical circuits and equipment manufacturing
Activity: Measuring instruments and meters, electric, manufacturing