SI Digital Framework
CLASSIFICATION OF SERVICES
Version: 1.0 Beta , last update: 2025-02-10
Metrology Area: Thermometry KCDB ↗
TTL file : T.ttl
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T/T Temperature

T/T-1 Items for defining ITS-90
T/T-1.1 Primary fixed-point cells
T/T-1.1.1 Cells for contact thermometry
T/T-1.1.2 Cells for radiation thermometry
T/T-1.2 Complete apparatus realizing fixed-points
T/T-1.2.1 Apparatus for contact thermometry
T/T-1.2.2 Apparatus for radiation thermometry
T/T-1.3 Standard platinum resistance therm. (SPRTs)
T/T-1.3.1 Capsule-type SPRTs
T/T-1.3.2 Long-stem SPRTs including HTSPRTs
T/T-1.4 Standard radiation thermometers
T/T-1.4.1 Standard radiation thermometers
T/T-2 Items for disseminating ITS-90 and PLTS 2000
T/T-2.1 Secondary fixed-point cells and apparatus
T/T-2.1.1 Secondary fixed-points and apparatus for contact thermometry
T/T-2.2 Resistance thermometers
T/T-2.2.1 Rhodium-iron resistance thermometers
T/T-2.2.2 Platinum resistance thermometers (PRTs)
T/T-2.2.3 Thermistors and other resistive thermometers
T/T-2.3 Thermocouples
T/T-2.3.1 Noble-metal thermocouples
T/T-2.3.2 Base-metal thermocouples
T/T-2.3.3 Pure-metal thermocouples
T/T-2.4 Liquid-in-glass thermometers
T/T-2.4.1 Liquid-in-glass thermometers
T/T-2.5 Radiation thermometry
T/T-2.5.1 Secondary fixed-point blackbody cells and apparatus
T/T-2.5.2 Variable temperature blackbody radiation sources
T/T-2.5.3 Strip lamps
T/T-2.5.4 Radiation thermometers and visual optical pyrometers
T/T-2.6 Other thermometers
T/T-2.6.1 Air temperature sensors
T/T-2.6.2 Other thermometers
T/T-2.7 Temperature sensors with display unit
T/T-2.7.1 Temperature sensors with display unit
T/T-2.8 Other measurement services
T/T-2.8.1 Bridge linearity
T/T-2.8.2 Compensation wires for cold junction
T/T-2.8.3 Wires for melting-point measurements for thermocouples
T/T-2.8.4 Temperature indicators
T/T-2.8.5 Phase-transition temperature of reference materials
T/T-2.8.6 Dry-well block calibrators
T/T-7 Items used for disseminating thermodynamic temperature
T/T-7.1 Radiation thermometry
T/T-7.1.1 Fixed-point blackbody cells and apparatus
T/T-7.1.2 Radiation thermometers
T/T-7.1.3 Variable temperature blackbody radiation sources

T/H Humidity

T/H-3 Hygrometers
T/H-3.1 Dew-point hygrometers
T/H-3.1.1 Dew-point hygrometers
T/H-3.2 Psychrometers
T/H-3.2.1 Psychrometers
T/H-3.3 Relative humidity sensors
T/H-3.3.1 Relative humidity sensors
T/H-3.4 Other hygrometers
T/H-3.4.1 Other hygrometers
T/H-4 Dynamic generators
T/H-4.1 Dew-point generators
T/H-4.1.1 Dew-point generators
T/H-4.2 Relative humidity generators
T/H-4.2.1 Relative humidity generators
T/H-4.3 Flow mixing
T/H-4.3.1 Flow mixing
T/H-4.4 Permeation tube, diffusion tube
T/H-4.4.1 Permeation tube, diffusion tube
T/H-5 Static generators
T/H-5.1 Salt solutions (saturated, unsaturated)
T/H-5.1.1 Salt solutions (saturated, unsaturated)
T/H-5.2 Reference gases
T/H-5.2.1 Reference gases

T/TQ Thermophysical quantities

T/TQ-6 Thermophysical quantities
T/TQ-6.1 Thermal transport property
T/TQ-6.1.1 Thermal conductivity
T/TQ-6.1.2 Thermal diffusivity
T/TQ-6.2 Caloric property
T/TQ-6.2.1 Specific heat capacity
T/TQ-6.2.2 Heat of fusion
T/TQ-6.2.3 Calorific value
T/TQ-6.3 Radiative property
T/TQ-6.3.1 Spectral emissivity
T/TQ-6.3.2 Total emissivity
T/TQ-6.4 Thermo-mechanical property
T/TQ-6.4.1 Thermal expansion coefficient