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.

This class includes the manufacture of watches, clocks and timing mechanisms and parts thereof.

This class includes :

Manufacture of watches and clocks of all kinds, including instrument panel clocks

Manufacture of watch and clock cases, including cases of precious metals

Manufacture of time-recording equipment and equipment for measuring, recording and otherwise displaying intervals of time with a watch or clock movement or with synchronous motor, such as: parking meters, time clocks, time/date stamps, process timers

Manufacture of time switches and other releases with a watch or clock movement or with synchronous motor: time locks

Manufacture of components for clocks and watches: movement of all kinds for watches and clocks, spring, jewels, dials, hands, plates, bridges and other parts

This class excludes :

Manufacture of non-metal watch bands (textile, leather, plastic), see 1512;

Manufacture of watch bands of precious metal, see 3211;

Manufacture of watch bands of non-precious metal, see 3212.