1. CPC Sections
  2. CPC Section G
  3. CPC Class G01
  4. CPC Subclass G01K
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
G01K
MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J 5/00) [2021-01]
NOTES

  • In this subclass, the following term is used with the meaning indicated :
    • "thermometer" includes thermally-sensitive elements not provided for in other subclasses.
  • Attention is drawn to the Notes following the title of class G01.
  • Attention is drawn to the Notes following the titles of class B81 and subclass B81B relating to "microstructural devices" and "microstructural systems".
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
G01K 1/00
Details of thermometers not specially adapted for particular types of thermometer (circuits for reducing thermal inertia G01K 7/42) [2013-01]
G01K 1/02
.
Means for indicating or recording specially adapted for thermometers [2021-01]
G01K 1/022
. .
for recording [2021-01]
G01K 1/024
. .
for remote indication [2021-01]
G01K 1/026
. .
{arrangements for monitoring a plurality of temperatures, e.g. by multiplexing} [2013-01]
G01K 1/028
. .
{arrangements for numerical indication} [2013-01]
G01K 1/04
. .
Scales [2013-01]
G01K 1/045
. . .
{temperature indication combined with the indication of another variable (indicating of human comfort G01W 1/17)} [2013-01]
G01K 1/06
. . .
Arrangements for facilitating reading, e.g. illumination, magnifying glass [2013-01]
G01K 1/065
. . . .
{of liquid column thermometers} [2013-01]
G01K 1/08
.
Protective devices, e.g. casings [2013-01]
G01K 1/10
. .
for preventing chemical attack [2013-01]
G01K 1/105
. . .
{for siderurgical use} [2013-01]
G01K 1/12
. .
for preventing damage due to heat overloading [2013-01]
G01K 1/125
. . .
{for siderurgical use} [2013-01]
G01K 1/14
.
Supports; Fastening devices; Arrangements for mounting thermometers in particular locations [2021-01]
G01K 1/143
. .
for measuring surface temperatures [2021-01]
G01K 1/146
. .
{arrangements for moving thermometers to or from a measuring position} [2013-01]
G01K 1/16
.
Special arrangements for conducting heat from the object to the sensitive element [2013-01]
G01K 1/165
. .
{for application in zero heat flux sensors} [2013-01]
G01K 1/18
. .
for reducing thermal inertia [2013-01]
G01K 1/20
.
Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature [2013-01]
G01K 1/22
. .
by means of fluid contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the fluid [2013-01]
G01K 1/24
. .
by means of compounded strips or plates, e.g. by bimetallic strips [2013-01]
G01K 1/26
.
Compensating for effects of pressure changes [2013-01]
G01K 3/00
Thermometers giving results other than momentary value of temperature (G01K 7/42 takes precedence) [2013-01]
G01K 3/005
.
{Circuits arrangements for indicating a predetermined temperature (fire detection G08B 17/00)} [2013-01]
G01K 3/02
.
giving means values; giving integrated values [2013-01]
G01K 3/04
. .
in respect of time [2013-01]
G01K 3/06
. .
in respect of space [2013-01]
G01K 3/08
.
giving differences of values (using thermoelectric elements G01K 7/02); giving differentiated values [2013-01]
G01K 3/10
. .
in respect of time, e.g. reacting only to a quick change of temperature [2013-01]
G01K 3/12
. . .
based upon expansion or contraction of materials [2013-01]
G01K 3/14
. .
in respect of space [2013-01]
G01K 2003/145
. . .
{Hotspot localization} [2013-01]
G01K 5/00
Measuring temperature based on the expansion or contraction of a material (G01K 9/00 takes precedence; giving other than momentary value of temperature G01K 3/00) [2021-01]
G01K 5/02
.
the material being a liquid (contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material G01K 5/32) [2013-01]
G01K 5/025
. .
{Manufacturing of this particular type of thermometer} [2013-01]
G01K 5/04
. .
Details [2013-01]
G01K 5/06
. . .
Arrangements for driving back the liquid column [2013-01]
G01K 5/08
. . .
Capillary tubes [2013-01]
G01K 5/10
. . .
Containers for the liquid [2013-01]
G01K 5/12
. . .
Selection of liquid compositions [2013-01]
G01K 5/14
. .
the liquid displacing a further liquid column or a solid body (for maximum or minimum indication G01K 5/20) [2013-01]
G01K 5/16
. .
with electric contacts [2013-01]
G01K 5/18
. .
with electric conversion means for final indication [2013-01]
G01K 5/20
. .
with means for indicating a maximum or a minimum or both (G01K 5/22 takes precedence) [2013-01]
G01K 5/22
. .
with provision for expansion indicating over not more than a few degrees [2023-05]
G01K 5/225
. . .
{with means for indicating a maximum, e.g. a constriction in the capillary tube} [2013-01]
G01K 5/24
. .
with provision for measuring the difference between two temperatures [2013-01]
G01K 5/26
. .
with provision for adjusting zero point of scale, e.g. Beckmann thermometer [2013-01]
G01K 5/28
.
the material being a gas (contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material G01K 5/32) [2013-01]
G01K 5/30
. .
the gas displacing a liquid column [2013-01]
G01K 5/32
.
the material being a fluid contained in a hollow body having parts which are deformable or displaceable (under pressure developed by evaporation G01K 11/04; pressure measuring devices in general G01L) [2013-01]
G01K 5/323
. .
{Selection of fluid compositions} [2013-01]
G01K 5/326
. .
{using a fluid container connected to the deformable body by means of a capillary tube} [2013-01]
G01K 5/34
. .
the body being a capsule (G01K 5/36, G01K 5/42 take precedence) [2013-01]
G01K 5/36
. .
the body being a tubular spring, e.g. Bourdon tube [2013-01]
G01K 5/38
. . .
of spiral formation [2013-01]
G01K 5/40
. . .
of helical formation [2013-01]
G01K 5/42
. .
the body being a bellows [2013-01]
G01K 5/44
. .
the body being a cylinder and piston [2013-01]
G01K 5/46
. .
with electric conversion means for final indication [2013-01]
G01K 5/465
. . .
{using electrical contact making or breaking devices} [2013-01]
G01K 5/48
.
the material being a solid [2013-01]
G01K 5/483
. .
{using materials with a configuration memory, e.g. Ni-Ti alloys} [2016-08]
G01K 5/486
. .
{using microstructures, e.g. made of silicon (G01K 7/015, G01K 7/028, G01K 7/226, G01K 17/006 take precedence)} [2013-01]
G01K 5/50
. .
arranged for free expansion or contraction [2013-01]
G01K 5/52
. . .
with electrical conversion means for final indication [2013-01]
G01K 5/54
. .
consisting of pivotally-connected elements [2013-01]
G01K 5/56
. .
constrained so that expansion or contraction causes a deformation of the solid [2013-01]
G01K 5/58
. . .
the solid body being constrained at more than one point, e.g. rod, plate, diaphragm (G01K 5/62 takes precedence) [2013-01]
G01K 5/60
. . . .
the body being a flexible wire or ribbon [2013-01]
G01K 5/62
. . .
the solid body being formed of compounded strips or plates, e.g. bimetallic strip [2013-01]
G01K 5/64
. . . .
Details of the compounds system [2013-01]
G01K 5/66
. . . . .
Selection of composition of the components of the system [2013-01]
G01K 5/68
. . . . .
Shape of the system [2013-01]
G01K 5/70
. . . .
specially adapted for indicating or recording [2013-01]
G01K 5/72
. . . . .
with electric transmission means for final indication [2013-01]
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 G01K 3/00) {; Power supply therefor, e.g. using thermoelectric elements} [2021-01]
G01K 7/003
.
{using pyroelectric elements (radiation pyrometers G01J 5/00)} [2013-01]
G01K 7/006
.
{using superconductive elements} [2013-01]
G01K 7/01
.
using semiconducting elements having PN junctions (G01K 7/02, G01K 7/16, G01K 7/30 take precedence) [2013-01]
G01K 7/015
. .
{using microstructures, e.g. made of silicon} [2013-01]
G01K 7/02
.
using thermoelectric elements, e.g. thermocouples [2021-01]
G01K 7/021
. .
{Particular circuit arrangements (G01K 7/026, G01K 7/12, G01K 7/14 take precedence)} [2013-01]
G01K 7/023
. .
{provided with specially adapted connectors (connectors per se H01R)} [2013-01]
G01K 7/025
. .
{expendable thermocouples} [2013-01]
G01K 7/026
. .
Arrangements for signalling failure or disconnection of thermocouples [2021-01]
G01K 7/028
. .
{using microstructures, e.g. made of silicon} [2013-01]
G01K 7/04
. .
the object to be measured not forming one of the thermoelectric materials [2021-01]
G01K 7/06
. . .
the thermoelectric materials being arranged one within the other with the junction at one end exposed to the object, e.g. sheathed type [2021-01]
G01K 7/08
. .
the object to be measured forming one of the thermoelectric materials, e.g. pointed type [2021-01]
G01K 7/10
. .
Arrangements for compensating for auxiliary variables, e.g. length of lead [2013-01]
G01K 7/12
. . .
Arrangements with respect to the cold junction, e.g. preventing influence of temperature of surrounding air [2013-01]
G01K 7/13
. . . .
Circuits for cold-junction compensation [2013-01]
G01K 7/14
. .
Arrangements for modifying the output characteristic, e.g. linearising [2013-01]
G01K 7/16
.
using resistive elements (resistive elements per se H01C, H01L) [2013-01]
G01K 2007/163
. .
{provided with specially adapted connectors} [2013-01]
G01K 2007/166
. .
{Electrical time domain reflectometry} [2013-01]
G01K 7/18
. .
the element being a linear resistance, e.g. platinum resistance thermometer (G01K 7/26 takes precedence) [2013-01]
G01K 7/183
. . .
{characterised by the use of the resistive element} [2013-01]
G01K 7/186
. . .
{using microstructures} [2013-01]
G01K 7/20
. . .
in a specially-adapted circuit, e.g. bridge circuit [2013-01]
G01K 7/203
. . . .
{in an oscillator circuit} [2013-01]
G01K 7/206
. . . .
{in a potentiometer circuit} [2013-01]
G01K 7/21
. . . .
for modifying the output characteristic, e.g. linearising [2013-01]
G01K 7/22
. .
the element being a non-linear resistance, e.g. thermistor (G01K 7/26 takes precedence) [2013-01]
G01K 7/223
. . .
{characterised by the shape of the resistive element} [2013-01]
G01K 7/226
. . .
{using microstructures, e.g. silicon spreading resistance} [2013-01]
G01K 7/24
. . .
in a specially-adapted circuit, e.g. bridge circuit [2013-01]
G01K 7/245
. . . .
{in an oscillator circuit} [2013-01]
G01K 7/25
. . . .
for modifying the output characteristic, e.g. linearising [2013-01]
G01K 7/26
. .
the element being an electrolyte [2013-01]
G01K 7/28
. . .
in a specially-adapted circuit, e.g. bridge circuit [2013-01]
G01K 7/30
.
using thermal noise of resistances or conductors [2013-01]
G01K 7/32
.
using change of resonant frequency of a crystal [2013-01]
G01K 7/34
.
using capacitative elements (capacitors per se H01G) [2013-01]
G01K 7/343
. .
{the dielectric constant of which is temperature dependant} [2013-01]
G01K 7/346
. .
{for measuring temperature based on the time delay of a signal through a series of logical ports} [2013-01]
G01K 7/36
.
using magnetic elements, e.g. magnets, coils (magnetic elements per se H01F) [2013-01]
G01K 7/38
. .
the variations of temperature influencing the magnetic permeability [2013-01]
G01K 7/40
.
using ionisation of gases [2013-01]
G01K 7/42
.
Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature [2021-01]
G01K 2007/422
. .
{Dummy objects used for estimating temperature of real objects} [2013-01]
G01K 7/425
. .
{Thermal management of integrated systems} [2013-01]
G01K 7/427
. .
{Temperature calculation based on spatial modeling, e.g. spatial inter- or extrapolation} [2013-01]
G01K 9/00
Measuring temperature based on movements caused by redistribution of weight, e.g. tilting thermometer (not giving momentary value of temperature G01K 3/00) [2013-01]
G01K 11/00
Measuring temperature based upon physical or chemical changes not covered by groups G01K 3/00, G01K 5/00, G01K 7/00 or G01K 9/00 [2013-01]
G01K 11/003
.
{using absorption or generation of gas, e.g. hydrogen} [2013-01]
G01K 11/006
.
{using measurement of the effect of a material on microwaves or longer electromagnetic waves, e.g. measuring temperature via microwaves emitted by the object (G01K 17/003, G01J 5/00 take precedence; measuring the effect of a material on X-, gamma- or particle radiation G01K 11/30)} [2013-01]
G01K 11/02
.
using evaporation or sublimation, e.g. by observing boiling [2013-01]
G01K 11/04
. .
from material contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the vapour [2013-01]
G01K 11/06
.
using melting, freezing, or softening [2013-01]
G01K 11/08
. .
of disposable test bodies, e.g. cone [2013-01]
G01K 11/10
.
using sintering [2013-01]
G01K 11/12
.
using changes in colour, translucency or reflectance [2021-01]
G01K 11/125
. .
using changes in reflectance [2021-01]
G01K 11/14
. .
of inorganic materials [2023-05]
G01K 11/16
. .
of organic materials [2013-01]
G01K 11/165
. . .
of organic liquid crystals [2023-05]
G01K 11/18
. .
of materials which change translucency [2013-01]
G01K 11/20
.
using thermoluminescent materials (G01K 11/32 takes precedence) [2013-01]
G01K 11/22
.
using measurement of acoustic effects [2013-01]
G01K 11/24
. .
of the velocity of propagation of sound [2013-01]
G01K 11/26
. .
of resonant frequencies [2013-01]
G01K 11/265
. . .
{using surface acoustic wave [SAW]} [2013-01]
G01K 11/28
.
using measurements of density {(measuring density in general G01N 9/00)} [2015-10]
G01K 11/30
.
using measurement of the effect of a material on X-radiation, gamma radiation or particle radiation [2013-01]
G01K 11/32
.
using changes in transmittance, scattering or luminescence in optical fibres [2021-01]
G01K 11/3206
. .
at discrete locations in the fibre, e.g. using Bragg scattering [2021-01]
G01K 11/3213
. . .
using changes in luminescence, e.g. at the distal end of the fibres [2021-01]
G01K 11/322
. .
using Brillouin scattering [2021-01]
G01K 11/324
. .
using Raman scattering [2021-01]
G01K 13/00
Thermometers specially adapted for specific purposes [2021-01]
G01K 13/006
.
{for cryogenic purposes} [2013-01]
G01K 13/008
. .
{using microstructures, e.g. made of silicon} [2013-01]
G01K 13/02
.
for measuring temperature of moving fluids or granular materials capable of flow [2013-01]
G01K 13/022
. .
{Suction thermometers} [2013-01]
G01K 13/024
. .
of moving gases [2021-01]
G01K 13/026
. .
{of moving liquids} [2021-01]
G01K 13/028
. .
{for use in total air temperature [TAT] probes} [2013-01]
G01K 13/04
.
for measuring temperature of moving solid bodies [2013-01]
G01K 13/06
. .
in linear movement [2013-01]
G01K 13/08
. .
in rotary movement [2013-01]
G01K 13/10
.
for measuring temperature within piled or stacked materials (by special arrangements for conducting heat from the object to the sensitive heat element G01K 1/16) [2013-01]
G01K 13/12
.
combined with sampling devices for measuring temperatures of samples of materials [2013-01]
G01K 13/125
. .
{for siderurgical purposes} [2013-01]
G01K 13/20
.
Clinical contact thermometers for use with humans or animals [2023-05]
G01K 13/223
. .
{Infrared clinical thermometers, e.g. tympanic} [2021-01]
G01K 13/25
. .
Protective devices therefor, e.g. sleeves preventing contamination [2021-01]
G01K 13/252
. . .
{for tympanic thermometers} [2021-01]
G01K 15/00
Testing or calibrating of thermometers [2013-01]
G01K 15/002
.
{Calibrated temperature sources, temperature standards therefor (arrangements with respect to the cold junction of thermo-electric elements G01K 7/12)} [2013-01]
G01K 15/005
.
{Calibration} [2013-01]
G01K 15/007
.
{Testing} [2013-01]
G01K 17/00
Measuring quantity of heat (measuring temperature by calorimetry G01K 3/00 - G01K 11/00; specially adapted for measuring thermal properties of materials, e.g. specific heat, heat of combustion G01N) [2016-05]
G01K 17/003
.
{for measuring the power of light beams, e.g. laser beams} [2013-01]
G01K 17/006
.
{Microcalorimeters, e.g. using silicon microstructures} [2013-01]
G01K 17/02
.
Calorimeters using transport of an indicating substances, e.g. evaporation calorimeters [2013-01]
G01K 17/025
. .
{where evaporation, sublimation or condensation caused by heating or cooling, is measured} [2013-01]
G01K 17/04
.
Calorimeters using compensation methods {, i.e. where the absorbed or released quantity of heat to be measured is compensated by a measured quantity of heating or cooling} [2016-08]
G01K 17/06
.
Measuring quantity of heat conveyed by flowing media, e.g. in heating systems (G01K 17/02, G01K 17/04 take precedence){e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device} [2017-08]
G01K 17/08
. .
based upon measurement of temperature difference {or of a temperature} [2013-01]
G01K 17/10
. . .
between an inlet and an outlet point, combined with measurement of rate of flow of the medium {if such, by integration during a certain time-interval} [2013-01]
G01K 17/12
. . . .
Indicating product of flow and temperature difference directly {or temperature} [2013-01]
G01K 17/14
. . . . .
using mechanical means for both measurements [2013-01]
G01K 17/16
. . . . .
using electrical {or magnetic} means for both measurements [2013-01]
G01K 17/18
. . . . .
using electrical {or magnetic} means for one measurement and mechanical means for the other [2013-01]
G01K 17/185
. . . . . .
{where the indicating-instrument is driven electrically or magnetically by the temperature-measurement device and mechanically by the flow-measurement device} [2013-01]
G01K 17/20
. . .
across a radiating surface, combined with ascertainment of the heat transmission coefficient {(materials therefor G01K 17/08)} [2013-01]
G01K 19/00
Testing or calibrating calorimeters [2013-01]
G01K 2201/00
Application of thermometers in air-conditioning systems [2013-01]
G01K 2201/02
.
in vehicles [2013-01]
G01K 2203/00
Application of thermometers in cryogenics [2013-01]
G01K 2205/00
Application of thermometers in motors, e.g. of a vehicle [2013-01]
G01K 2205/02
.
for measuring inlet gas temperature [2013-01]
G01K 2205/04
.
for measuring exhaust gas temperature [2013-01]
G01K 2207/00
Application of thermometers in household appliances [2013-01]
G01K 2207/02
.
for measuring food temperature [2013-01]
G01K 2207/04
. .
for conservation purposes [2013-01]
G01K 2207/06
. .
for preparation purposes [2013-01]
G01K 2207/08
. .
with food recipients having temperature sensing capability [2013-01]
G01K 2211/00
Thermometers based on nanotechnology [2013-01]
G01K 2213/00
Temperature mapping [2013-01]
G01K 2215/00
Details concerning sensor power supply [2013-01]
G01K 2217/00
Temperature measurement using electric or magnetic components already present in the system to be measured [2013-01]
G01K 2219/00
Thermometers with dedicated analog to digital converters [2013-01]