Establishments primarily engaged in manufacturing temperature and related controls for heating and air-conditioning installations and refrigeration applications, which are electrically, electronically, or pneumatically actuated, and which measure and control variables such as temperature and humidity; and automatic regulators used as components of household appliances. Establishments primarily engaged in manufacturing industrial process controls are classified in Industry 3823; those manufacturing motor control switches are classified in Industry 3625; those manufacturing switches for household appliances are classified in Industry 3643; and those manufacturing appliance timers are classified in Industry 3873.

  • Air flow controllers, air-conditioning and refrigeration except valves
  • Appliance regulators, except switches
  • Building services monitoring controls, automatic
  • Clothes dryer controls including dryness controls
  • Combination limit and fan controls
  • Combination oil and hydronic controls
  • Damper operators pneumatic, thermostatic, and electric
  • Electric air cleaner controls, automatic
  • Electric heat proportioning controls, modulating controls
  • Electric space heater controls, automatic
  • Energy cutoff controls, residential and commercial types
  • Fan control, temperature responsive
  • Flame safety controls for furnaces and boilers
  • Float controls, residential and commercial types
  • Gas burner automatic controls, except valves
  • Gradual switches, pneumatic
  • Humidistats wall, duct, and skeleton
  • Humidity controls, air conditioning types
  • Hydronic circulator control, automatic
  • Hydronic limit control
  • Hydronic pressure and temperature controls
  • Ice bunk controls
  • Ice maker controls
  • Ignition controls for gas appliances and furnaces, automatic
  • In-built thermostats, filled system and bimetal types
  • Incinerator control systems, residential and commercial types
  • Limit controls, residential and commercial heating types
  • Line or limit control for electric heat
  • Liquid level controls, residential and commercial heating types
  • Oven temperature controls, nonindustrial
  • Pneumatic relays, air-conditioning type
  • Pressure controllers, air-conditioning system type
  • Primary oil burner controls, including stack controls and cadmium
  • Refrigeration controls, pressure
  • Refrigeration thermostats
  • Refrigeration/air-conditioning defrost controls
  • Sequencing controls for electric heat
  • Static pressure regulators
  • Steam pressure controls, residential and commercial type
  • Surface burner controls, temperature
  • Switches pneumatic positioning remote
  • Switches, thermostatic
  • Temperature controls, automatic: residential and commercial types
  • Temperature sensors for motor windings
  • Thermocouples, vacuum: glass
  • Thermostats: air-conditioning, refrigeration, comfort heating,
  • Time program controls, air-conditioning systems
  • Vapor heating controls
  • Water heater controls