- Temperature instruments: industrial process type (1)
- Thermistors, industrial process type (1)
- Thermocouples, industrial process type (1)
- Controllers, for process variables, all types (1)
- Coulometric analyzers, industrial process type (1)
- Data loggers, industrial process type (1)
- Density and specific gravity instruments, industrial process (1)
- Telemetering instruments, industrial process type (1)
- On-stream gas/liquid analysis instruments, industrial (1)
- Water quality monitoring and control systems (2)
- Industrial process control instruments (1)
