Establishments primarily engaged in manufacturing industrial instruments and related products for measuring, displaying (indicating and/or recording), transmitting, and controlling process variables in manufacturing, energy conversion, and public service utilities. These instruments operate mechanically, pneumatically, electronically, or electrically to measure process variables, such as temperature, humidity, pressure, vacuum, combustion, flow, level, viscosity, density, acidity, alkalinity, specific gravity, gas and liquid concentration, sequence, time interval, mechanical motion, and rotation. Establishments primarily engaged in manufacturing electrical integrating meters are classified in Industry 3825; those manufacturing residential and commercial comfort controls are classified in Industry 3822; those manufacturing all liquid-in-glass and bimetal thermometers and glass hydrometers are classified in Industry 3829; those manufacturing recorder charts are classified in Industry Group 275; and those manufacturing analytical and optical instruments are classified in Industries 3826 and 3827.
| Absorption analyzers, industrial process type: e.g., infrared, X-ray | Liquid concentration instruments, industrial process type |
| Analyzers, industrial process type | Liquid level instruments, industrial process type |
| Annunciators, relay and solid-state types: industrial display | Magnetic flow meters, industrial process type |
| Boiler controls: industrial, power, and marine type | Manometers, industrial process type |
| Buoyancy instruments, industrial process type | Moisture meters, industrial process type |
| Chromatographs, industrial process type | Nuclear reactor controls |
| Combustion control instruments, except commercial and household | Panelboard indicators, recorders and controllers: receiver type |
| Computer interface equipment for industrial process control | Potentiometric self-balancing instruments, except X-Y plotters |
| Controllers for process variables: electric, electronic, and pneumatic | Pressure gauges, dial and digital |
| Coulometric analyzers, industrial process type | Pressure instruments, industrial process type |
| Data loggers, industrial process type | Primary elements for process flow measurement: orifice plates |
| Density and specific gravity instruments, industrial process type | Programmers, process type |
| Differential pressure instruments, industrial process type | Pyrometers, industrial process type |
| Digital displays of process variables | Refractometers, industrial process type |
| Draft gauges, industrial process type | Resistance thermometers and bulbs, industrial process type |
| Electrodes used in industrial process measurement | Telemetering instruments, industrial process type |
| Electrolytic conductivity instruments, industrial process type | Temperature instruments: industrial process type, except glass and bimetal |
| Flow instruments, industrial process type | Thermal conductivity instruments, industrial process type |
| Fluidic devices, circuits, and systems for process control | Thermistors, industrial process type |
| Gas and liquid analysis instruments, industrial process type | Thermocouples, industrial process type |
| Gas flow computers, industrial process type | Thermometers, filled system: industrial process type |
| Humidity instruments, industrial process type | Time cycle and program controllers, industrial process type |
| Hydrometers, industrial process type | Transmitters of process variables, standard signal conversion |
| Industrial process control instruments | Turbidity instruments, industrial process type |
| Infrared instruments, industrial process type | Turbine flow meters, industrial process type |
| Level and bulk measuring instruments, industrial process type | Viscosimeters, industrial process type |
| Liquid analysis instruments, industrial process type | Water quality monitoring and control systems |
| Codes |
Titles | Total Marketable US Businesses |
| 38230000 | Process control instruments | 1,247 |
| 38230100 | Temperature measurement instruments, industrial | 62 |
| 38230101 | Pyrometers, industrial process type | 6 |
| 38230102 | Resistance thermometers and bulbs, industrial process type | 1 |
| 38230103 | Temperature instruments: industrial process type | 45 |
| 38230104 | Thermistors, industrial process type | 7 |
| 38230105 | Thermocouples, industrial process type | 13 |
| 38230106 | Thermometers, filled system: industrial process type | 6 |
| 38230200 | Pressure measurement instruments, industrial | 59 |
| 38230201 | Differential pressure instruments, industrial process type | 4 |
| 38230202 | Manometers, industrial process type | 18 |
| 38230203 | Pressure gauges, dial and digital | 19 |
| 38230300 | Industrial flow and liquid measuring instruments | 49 |
| 38230301 | Flow instruments, industrial process type | 42 |
| 38230302 | Fluidic devices, circuits, and systems for process control | 27 |
| 38230303 | Gas flow computers, industrial process type | 6 |
| 38230304 | Level and bulk measuring instruments, industrial process | 14 |
| 38230305 | Liquid level instruments, industrial process type | 22 |
| 38230306 | Magnetic flow meters, industrial process type | 5 |
| 38230307 | Primary elements for process flow measurement | 6 |
| 38230308 | Turbidity instruments, industrial process type | 0 |
| 38230309 | Turbine flow meters, industrial process type | 4 |
| 38230310 | Viscosimeters, industrial process type | 4 |
| 38230400 | Industrial process measurement equipment | 120 |
| 38230401 | Analyzers, industrial process type | 25 |
| 38230402 | Annunciators, relay and solid state types | 2 |
| 38230403 | Computer interface equipment, for industrial process control | 101 |
| 38230404 | Controllers, for process variables, all types | 61 |
| 38230405 | Coulometric analyzers, industrial process type | 3 |
| 38230406 | Data loggers, industrial process type | 17 |
| 38230407 | Density and specific gravity instruments, industrial process | 0 |
| 38230408 | Digital displays of process variables | 68 |
| 38230409 | Draft gauges, industrial process type | 10 |
| 38230410 | Electrodes used in industrial process measurement | 7 |
| 38230411 | Electrolytic conductivity instruments, industrial process | 7 |
| 38230412 | Hydrometers, industrial process type | 3 |
| 38230413 | Infrared instruments, industrial process type | 18 |
| 38230414 | Panelboard indicators, recorders and controllers: receiver | 11 |
| 38230415 | Programmers, process type | 37 |
| 38230416 | Refractometers, industrial process type | 4 |
| 38230417 | Telemetering instruments, industrial process type | 7 |
| 38230418 | Thermal conductivity instruments, industrial process type | 33 |
| 38230419 | Time cycle and program controllers, industrial process type | 7 |
| 38230420 | Transmitters of process variables, stand. signal conversion | 9 |
| 38230500 | On-stream gas/liquid analysis instruments, industrial | 21 |
| 38230501 | Absorption analyzers: infrared, x-ray, etc.: industrial | 16 |
| 38230502 | Chromatographs, industrial process type | 5 |
| 38230503 | Liquid analysis instruments, industrial process type | 11 |
| 38230504 | Liquid concentration instruments, industrial process type | 1 |
| 38230505 | PH instruments, industrial process type | 1 |
| 38230506 | Water quality monitoring and control systems | 182 |
| 38239901 | Boiler controls: industrial, power, and marine type | 12 |
| 38239902 | Buoyancy instruments, industrial process type | 3 |
| 38239903 | Combustion control instruments | 32 |
| 38239904 | Humidity instruments, industrial process type | 6 |
| 38239905 | Industrial process control instruments | 122 |
| 38239906 | Moisture meters, industrial process type | 13 |
| 38239907 | Nuclear reactor controls | 3 |
| 38239908 | Potentiometric self-balancing inst., except X-Y plotters | 2 |
