MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00)

Introduced: September 1968

Description

G01K covers temperature measurement and heat quantity determination across diverse industrial and scientific applications. This subclass encompasses thermometers, pyrometers, calorimeters, and thermally-sensitive transducers that detect or quantify thermal phenomena. Included are resistance thermometers, thermocouples, radiation thermometers, and thermal sensors designed for process monitoring, temperature control, and heat transfer analysis. The subclass specifically addresses thermally-sensitive elements that do not fall under more specialized classifications, serving as a broad catch-all for temperature and heat measurement technologies not classified elsewhere in the IPC system.

Title

Titles differ between systems:

IPC: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

CPC: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00)

Full Title

Full titles differ between systems:

IPC:

MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

CPC:

MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00)

Of 19 combined children, 10 exist in both systems.

9 codes are CPC-only extensions.

Note: 9 CPC extensions are marked as secondary classification only.

7 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01K 1/00 Details of thermometers not specially adapted for particular types of thermometer (circuits for reducing thermal inertia G01K7/42) IPC+CPC Available in IPC and CPC
G01K 11/00 Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 +2 CPC IPC+CPC Available in IPC and CPC
G01K 13/00 Thermometers specially adapted for specific purposes +1 CPC IPC+CPC Available in IPC and CPC
G01K 15/00 Testing or calibrating of thermometers +3 CPC IPC+CPC Available in IPC and CPC
G01K 17/00 Measuring quantity of heat (measuring temperature by calorimetry G01K3/00 - G01K11/00; specially adapted for measuring thermal properties of materials, e.g. specific heat, heat of combustion G01N) +2 CPC IPC+CPC Available in IPC and CPC
G01K 19/00 Testing or calibrating calorimeters IPC+CPC Available in IPC and CPC
G01K 2201/00 Application of thermometers in air-conditioning systems 2nd only +1 CPC CPC only CPC only
G01K 2203/00 Application of thermometers in cryogenics 2nd only CPC only CPC only
G01K 2205/00 Application of thermometers in motors, e.g. of a vehicle 2nd only +2 CPC CPC only CPC only
G01K 2207/00 Application of thermometers in household appliances 2nd only +1 CPC CPC only CPC only
G01K 2211/00 Thermometers based on nanotechnology 2nd only CPC only CPC only
G01K 2213/00 Temperature mapping 2nd only CPC only CPC only
G01K 2215/00 Details concerning sensor power supply 2nd only CPC only CPC only
G01K 2217/00 Temperature measurement using electric or magnetic components already present in the system to be measured 2nd only CPC only CPC only
G01K 2219/00 Thermometers with dedicated analog to digital converters 2nd only CPC only CPC only
G01K 3/00 Thermometers giving results other than momentary value of temperature (G01K7/42 takes precedence) +1 CPC IPC+CPC Available in IPC and CPC
G01K 5/00 Measuring temperature based on the expansion or contraction of a material (G01K9/00 takes precedence; giving other than momentary value of temperature G01K3/00) IPC+CPC Available in IPC and CPC
G01K 7/00 Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat (giving results other than momentary value of temperature G01K3/00) +2 CPC IPC+CPC Available in IPC and CPC
G01K 9/00 Measuring temperature based on movements caused by redistribution of weight, e.g. tilting thermometer (not giving momentary value of temperature G01K3/00) IPC+CPC Available in IPC and CPC