PSIC Class 2651 covers Manufacture of measuring, testing, navigating and control equipment. Current child subclasses include Manufacture of Radar Equipment, Radio Remote Control Apparatus, Manufacture of Electrical...
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Class 2651 sits in the PSIC 2019 hierarchy under C Manufacturing > 26 Manufacture of Computer, Electronic and Optical Products > 265 Manufacture of measuring, testing, navigating and control equipment; watches and clocks. This class usually fans out into more specific subclasses such as Manufacture of Radar Equipment, Radio Remote Control Apparatus, Manufacture of Electrical Quantities Measuring and Controlling Instruments, and Manufacture of Temperature Measuring and Controlling Hygrometric Instruments. It is the level people use when they already know the activity family but still need the exact five-digit match.
This class is used when a business can already narrow the activity family and only needs to compare the final subclasses such as Manufacture of Radar Equipment, Radio Remote Control Apparatus, Manufacture of Electrical Quantities Measuring and Controlling Instruments, and Manufacture of Temperature Measuring and Controlling Hygrometric Instruments. It is the level most often checked before a five-digit decision is finalized.
Use this class to choose between its final subclasses such as Manufacture of Radar Equipment, Radio Remote Control Apparatus, Manufacture of Electrical Quantities Measuring and Controlling Instruments, and Manufacture of Temperature Measuring and Controlling Hygrometric Instruments. If two options look close, compare the exact activity, the outputs and the way the business actually earns revenue.
This class includes manufacture of search, detection, navigation, guidance, aeronautical and nautical systems and instruments; automatic controls and regulators for applications, such as heating, air-conditioning, refrigeration and appliances; instruments and devices for measuring, displaying, indicating, recording, transmitting and controlling industrial process variables, such as temperature, humidity, pressure, vacuum, combustion, flow, level, viscosity, density, acidity, concentration and rotation totalizing (i.e. registering) fluid meters and counting devices; instruments for measuring and testing the characteristics of electricity and electrical signals; instruments and instrumentation systems for laboratory analysis of the chemical or physical composition or concentration of samples of solid, fluid, gaseous or composite material and other measuring and testing instruments and parts thereof. The manufacture of non-electric measuring, testing, navigating and control equipment (except simple mechanical tools) is included here. This class includes: Manufacture of aircraft engine instruments Manufacture of automotive emissions testing equipment Manufacture of meteorological instruments Manufacture of physical properties testing and inspection equipment Manufacture of polygraph machines Manufacture of instruments for measuring and testing electricity and electrical signals (including for telecommunications) Manufacture of radiation detection and monitoring instruments Manufacture of surveying instruments Manufacture of electron and proton microscopes Manufacture of thermometers liquid-in-glass and bimetal types (except medical) Manufacture of humidistats Manufacture of hydronic limit controls Manufacture of flame and burner control Manufacture of spectrometers Manufacture of pneumatic gauges Manufacture of consumption meters (e.g. water, gas) Manufacture of flow meters and counting devices Manufacture of tally counters Manufacture of mine detectors, pulse (signal) generators; metal detectors Manufacture of search, detection, navigation, aeronautical and nautical equipment, including sonobuoys Manufacture of radar equipment Manufacture of GPS devices Manufacture of environmental controls and automatic controls for appliances Manufacture of measuring and recording equipment (e.g. flight recorders) Manufacture of motion detectors Manufacture of laboratory analytical instruments (e.g. blood analysis equipment) Manufacture of laboratory scales, balances, incubators, and miscellaneous laboratory apparatus for measuring testing, etc. This class excludes: Manufacture of telephone answering machines, see 2630; Manufacture of irradiation equipment, see 2660; Manufacture of optical measuring and checking devices and instrument (e.g. fire control equipment, photographic light meters, range finders) see 2670; Manufacture of optical positioning equipment, see 2670; Manufacture of dictating machines, see 2817; Manufacture of levels, tape measures and similar hand tools, machinists precision tools, see 2819; Manufacture of medical thermometers, see 3250; Installation of industrial process control equipment, see 3320. remote control apparatus measuring and controlling instruments controlling hygrometric instruments controlling instruments and gauges measuring and controlling instruments measuring and controlling, timing and cycle instruments equipment and measuring and controlling equipment, n.e.c.
PSIC Class 2651 is the four-digit layer that sits just above the final subclasses and usually defines the activity family for Manufacture of measuring, testing, navigating and control equipment.
Read the neighboring classes and compare the exact wording of the child subclasses. Nearby options include 2652 Manufacture of watches and clocks.
It is usually the last broad checkpoint before the five-digit subclass choice, so it is the right place to catch near-miss classifications.