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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Chinese Taipei, CMS (ITRI Center for Measurement Standards)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen carbon dioxide 0.5 to 160 1 to 0.2 0.5 to 160 0.5 to 1.6E2
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C003
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen carbon monoxide 1 to 100 1 to 0.5 1 to 100 1 to 1.0E2
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C001
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
air methane 1 to 20 0.8 to 0.3 1 to 20 1 to 2.0E1
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C015
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen methane 0.5 to 1 1 to 0.8 0.5 to 1 0.5 to 1
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C005
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen methane 1 to 500 0.8 to 0.2 1 to 500 1 to 5.0E2
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C006
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mol/mol Relative expanded uncertainty in %
nitrogen oxygen 0.05 to 0.3 1 to 0.1 0.05 to 0.3 5.0E-2 to 0.3
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C014
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen propane 1 to 50 1 to 0.5 1 to 50 1 to 5.0E1
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C007
Linear vibration , Voltage sensitivity (magnitude)
Acceleration measuring chain
Relative expanded uncertainty : 0.5 %
ISO 16063-11 interferometry by fringe-counting method
Acceleration : 5 m/s2 to 100 m/s2
Frequency : 50 Hz to 200 Hz
Approved on 21 October 2001
Institute service identifier : CMS/V-01
Linear vibration , Voltage sensitivity (magnitude)
Acceleration measuring chain
Relative expanded uncertainty : 0.37 %
ISO 16063-11 interferometry by fringe-counting method
Acceleration : 0.5 m/s2 to 5 m/s2
Frequency : 5 Hz to 40 Hz
Approved on 21 October 2001
Institute service identifier : CMS/V-04
Linear vibration , Voltage sensitivity (magnitude)
Acceleration measuring chain
Relative expanded uncertainty : 3.1 %
Comparison, ISO 5347-3
Frequency : 100 Hz
Approved on 21 October 2001
Institute service identifier : CMS/V-02
Items for defining ITS-90 , Temperature : 961.78 °C
Fixed-point blackbody furnace (Ag)
Absolute expanded uncertainty : 0.74 °C
Comparison using radiation thermometer
Wavelength : 0.65 µm

ified on 09 February 2015
Approved on 05 June 2014
Institute service identifier : CMS/T01
Items for defining ITS-90 , Temperature : 231.928 °C
SPRT
Absolute expanded uncertainty : 1.1 mK
Tin freezing point cell
Furnace : 3-zone

Modified on 09 February 2015
Approved on 28 June 2007
Items for defining ITS-90 , Temperature : 660.323 °C
SPRT
Absolute expanded uncertainty : 4.1 mK
Aluminum freezing point cell

ified on 09 February 2015
Approved on 05 June 2014
Institute service identifier : CMS/T05
Items for defining ITS-90 , Temperature : 29.7646 °C
SPRT
Absolute expanded uncertainty : 0.48 mK
Gallium melting point cell

Modified on 09 February 2015
Approved on 28 June 2007
Spectral.-int. meas. for sources and detectors , Chromaticity response
Colorimeter
Absolute expanded uncertainty : 3.0E-3
Spectroradiometer
Correlated colour temperature : 2500 K to 3500 K
Approved on 27 September 2004
Spectral properties of materials , Radiance factor
General material
Relative expanded uncertainty : 0.54 % to 1.2 %
Spectrophotometer
Specific measurement conditions : d/0
Uncertainty of 0.54 for white, 0.85 for red, 1.15 for blue, and 0.56 for green.
Approved on 27 September 2004
Fluid flow , Gas flowrate : 15 m3/h to 1.20E4 m3/h
Gas-flow meter
Relative expanded uncertainty : 0.12 %
Primary method (Weighing tank: 160 kg; flying start / finish)
Fluid : dry air
Absolute pressure : 0.5 MPa to 6 MPa
Temperature : ambient
Mass flow rate: (18 to 14000) kg/h with the same uncertainty. Test line: (25 to 150) mm. Stated volume flow rate is the actural flow rate multiplied by the working pressure.
Approved on 28 December 2017
Institute service identifier : CMS/F05
Fluid flow , Water flowrate : 1 mg/min to 10 mg/min
Liquid Flow meters
Relative expanded uncertainty : 0.7 %
Primary method (Weighing tank: 220 g; flying or standing start / finish, dynamic or static weighing)
Fluid : pure water
Gauge pressure : below 200 kPa
Temperature : 15 °C to 27 °C
Volume flow rate: (1 to 10) mm3/min with relative expanded uncertainties of 0.7 %.
Approved on 28 December 2017
Institute service identifier : CMS/F11
Pressure , Absolute pressure: gas medium : 6.00E-4 Pa to 1 Pa
Vacuum gauge
Relative expanded uncertainty : 2.9E-2
Spinning rotor gauge, comparison method
Temperature : 20 ºC to 25 ºC
Gas species : Nitrogen
Gas purity : 99.9 % or better
Approved on 16 January 2015
Institute service identifier : CMS/L02
Pressure , Gauge pressure: gas medium : 172 kPa to 700 kPa
Pressure measuring device, standard pressure generator
Relative expanded uncertainty : 2.6E-5
Direct comparison with standard, cross float
Approved on 16 January 2015
Institute service identifier : CMS/P04

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