- Resistance thermometers and bulbs, industrial process type (2)
- Temperature instruments: industrial process type (8)
- Thermocouples, industrial process type (1)
- Thermometers, filled system: industrial process type (1)
- Pressure measurement instruments, industrial (8)
- Pressure gauges, dial and digital (12)
- Flow instruments, industrial process type (18)
- Fluidic devices, circuits, and systems for process control (6)
- Gas flow computers, industrial process type (4)
- Level and bulk measuring instruments, industrial process (5)
- Liquid level instruments, industrial process type (5)
- Magnetic flow meters, industrial process type (2)
- Primary elements for process flow measurement (3)
- Turbine flow meters, industrial process type (1)
- Analyzers, industrial process type (6)
- Computer interface equipment, for industrial process control (57)
- Controllers, for process variables, all types (5)
- Data loggers, industrial process type (7)
- Density and specific gravity instruments, industrial process (1)
- Digital displays of process variables (18)
- Draft gauges, industrial process type (1)
- Electrodes used in industrial process measurement (5)
- Infrared instruments, industrial process type (4)
- Panelboard indicators, recorders and controllers: receiver (2)
- Programmers, process type (5)
- Refractometers, industrial process type (1)
- Telemetering instruments, industrial process type (1)
- Thermal conductivity instruments, industrial process type (3)
- Time cycle and program controllers, industrial process type (1)
- Transmitters of process variables, stand. signal conversion (1)
- Liquid concentration instruments, industrial process type (1)
- Water quality monitoring and control systems (32)
- Boiler controls: industrial, power, and marine type (6)
- Combustion control instruments (21)
- Industrial process control instruments (66)
- Moisture meters, industrial process type (2)
