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United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Thermometry for United Kingdom (.PDF file)
Temperature. Noble-metal thermocouple (type R, S), 0 °C to 1100 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.3
Calibration at fixed points
Approved on 03 November 2009
Internal NMI service identifier: NPL/PM03
 
Temperature. Noble-metal thermocouple (type B)), 400 °C to 800 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.9 to 0.5
Calibration at fixed points
Approved on 03 November 2009
Internal NMI service identifier: NPL/PM03
 
Temperature. Noble-metal thermocouple (type B)), 800 °C to 1100 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.5
Calibration at fixed points
Approved on 03 November 2009
Internal NMI service identifier: NPL/PM03
 
Temperature. Noble-metal thermocouple (type R, S), 1100 °C to 1600 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 1.0 to 1.5
Calibration at fixed points
Approved on 03 November 2009
Internal NMI service identifier: NPL/PM03
 
Temperature. Noble-metal thermocouple (type B)), 1100 °C to 1600 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 1.5
Calibration at fixed points
Approved on 03 November 2009
Internal NMI service identifier: NPL/PM03
 
Temperature. Base-metal thermocouple (T, K, N), -196 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.5
Calibration by comparison
In liquid nitrogen
Approved on 03 November 2009
Internal NMI service identifier: NPL/PM03
 
Temperature. Cell for contact thermometry, 0.01 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.000071
Triple point of water
Approved on 19 March 2012
Internal NMI service identifier: NPL/PK01
 
Temperature. Long-stem SPRT, 0.01 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.000109
Calibration at water triple point
Approved on 19 March 2012
Internal NMI service identifier: NPL/PM02
 
Temperature. Cell for contact thermometry, -38.8344 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.0002
Triple point of mercury
Approved on 20 May 2010
Internal NMI service identifier: NPL/PK01
 
Temperature. Cell for contact thermometry, 29.7646 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.0002
Melting point of gallium
Approved on 20 May 2010
Internal NMI service identifier: NPL/PK01
 
Temperature. Cell for contact thermometry, -189.3442 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.000255
Triple point of argon for long stem SPRT
Approved on 17 January 2013
Internal NMI service identifier: NPL/PK01
 
Temperature. Cell for contact thermometry, 660.323 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.0025
Freezing point of aluminium
Approved on 20 May 2010
Internal NMI service identifier: NPL/PK01
 
Temperature. Cell for contact thermometry, 961.78 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.004
Freezing point of silver
Approved on 20 May 2010
Internal NMI service identifier: NPL/PK01
 
Temperature. Long-stem SPRT, -189.3442 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.0005
Calibration at argon triple point
Approved on 20 May 2010
Internal NMI service identifier: NPL/PM02
 
Temperature. Long-stem SPRT, -38.8344 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.00035
Calibration at mercury triple point
Approved on 20 May 2010
Internal NMI service identifier: NPL/PM02
 
Temperature. Long-stem SPRT, 29.7646 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.0003
Calibration at gallium melting point
Approved on 20 May 2010
Internal NMI service identifier: NPL/PM02
 
Temperature. Secondary fixed point blackbody, 156.5985 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.08
Freezing point of indium
Wavelength: 1600 nm
Approved on 06 January 2012
Internal NMI service identifier: NPL/PM06
 
Temperature. Secondary fixed point blackbody, 231.928 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.08
Freezing point of tin
Wavelength: 1600 nm
Approved on 06 January 2012
Internal NMI service identifier: NPL/PM06
 
Temperature. Secondary fixed point blackbody, 419.527 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.08
Freezing point of zinc
Wavelength: 1600 nm
Approved on 06 January 2012
Internal NMI service identifier: NPL/PM06
 
Temperature. Variable temperature blackbody, 200 °C to 500 °C
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °C: 0.3
Calibration by comparison
Wavelength: 1.6 µm to 14 µm
Approved on 06 January 2012
Internal NMI service identifier: NPL/PM06