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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)
Czechia, CMI (Czech Metrology Institute)
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in S/m Relative expanded uncertainty in % Electrolytic conductivity in S/m Relative expanded uncertainty in %
aqueous solution 1.50E-3 to 0.015 1.7 to 0.23 5.00E-3 to 0.015 1.7 to 0.23
  • Mechanism for measurement service delivery : Calibration and CMI CRM k43-k45: aqueous solution of KCl
  • Temperature range 15 °C to 30 °C
  • Approved on 28 June 2018
  • Institute service identifier : 6016 kon1
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in S/m Relative expanded uncertainty in % Electrolytic conductivity in S/m Relative expanded uncertainty in %
aqueous solution 0.015 to 0.15 0.62 to 0.19 0.015 to 0.15 0.64 to 0.19
  • Mechanism for measurement service delivery : Calibration and CRM: aqueous solution of KCl
  • Temperature range 15 °C to 30 °C
  • Approved on 08 July 2015
  • Institute service identifier : 6016 kon2
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 9.8 to 10.2 4.0E-3 9.8 to 10.2 7.0E-3
  • Mechanism for measurement service delivery : CMI CRM p110
  • Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. Measurement temperature 10 °C to 50 °C, data given for 25 °C
  • Approved on 06 December 2011
  • Institute service identifier : 6016 pH2
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 8.5 to 9.5 4.0E-3 8.5 to 9.5 7.0E-3
  • Mechanism for measurement service delivery : CMI CRM p190
  • Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. Measurement temperature 10 °C to 50 °C, data given for 25 °C
  • Approved on 28 June 2018
  • Institute service identifier : 6016 pH4
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Relative expanded uncertainty in % Electrolytic conductivity in µS/cm Relative expanded uncertainty in %
aqueous solution (KCl or NaCl) 0.15 to 1.5 0.39 to 0.4
  • Mechanism for measurement service delivery : Determination of electrolytic conductivity value using primary standard.
  • Reference temperature of 25°C.
  • Approved on 22 June 2021
  • Institute service identifier : 616-Con-0.15
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 1.5 to 1.9 5.0E-3 1.5 to 1.9 7.0E-3
  • Mechanism for measurement service delivery : CMI CRM p120
  • Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. Measurement temperature 10 °C to 50 °C, data given for 25 °C
  • Approved on 06 December 2011
  • Institute service identifier : 6016 pH1
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 3.8 to 4.2 7.0E-3 3.8 to 4.2 8.0E-3
  • Mechanism for measurement service delivery : CMI CRM p140
  • Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. Measurement temperature 10 °C to 50 °C, data given for 25 °C
  • Approved on 28 June 2018
  • Institute service identifier : 6016 pH2
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Relative expanded uncertainty in % Electrolytic conductivity in µS/cm Relative expanded uncertainty in %
aqueous solution (KCl or NaCl) 0.05 to 0.15 0.73 to 0.39
  • Mechanism for measurement service delivery : Determination of electrolytic conductivity value using primary standard.
  • Reference temperature of 25°C.
     
  • Approved on 22 June 2021
  • Institute service identifier : 616-Con-0.05
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Relative expanded uncertainty in % Electrolytic conductivity in µS/cm Relative expanded uncertainty in %
aqueous solution (KCl or NaCl) 1.5 to 15 0.4 to 1.8
  • Mechanism for measurement service delivery : Determination of electrolytic conductivity value using primary standard.
  • Reference temperature of 25°C.
  • Approved on 22 June 2021
  • Institute service identifier : 616-Con-1.5
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Relative expanded uncertainty in % Electrolytic conductivity in µS/cm Relative expanded uncertainty in %
aqueous solution (KCl or NaCl) 15 to 150 1.8
  • Mechanism for measurement service delivery : Determination of electrolytic conductivity value using primary standard.
  • Reference temperature of 25°C.
  • Approved on 22 June 2021
  • Institute service identifier : 616-Con-15
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in S/m Relative expanded uncertainty in % Electrolytic conductivity in S/m Relative expanded uncertainty in %
aqueous solution 0.15 to 1.5 0.1 0.15 to 1.5 0.1
  • Mechanism for measurement service delivery : Calibration and CMI CRM k33-k37: aqueous solution of KCl
  • Temperature range 15 °C to 30 °C
  • Approved on 28 June 2018
  • Institute service identifier : 6016 kon3
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 6.8 to 7.5 4.0E-3 6.8 to 7.5 5.0E-3
  • Mechanism for measurement service delivery : CMI CRM p170
  • Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. Measurement temperature 10 °C to 50 °C, data given for 25 °C
  • Approved on 28 June 2018
  • Institute service identifier : 6016 pH3
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 9 to 9.4 4.0E-3 9 to 9.4 7.0E-3
  • Mechanism for measurement service delivery : CMI CRM p190
  • Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. Measurement temperature 10 °C to 50 °C, data given for 25 °C
  • Approved on 08 July 2015
  • Institute service identifier : 6016 pH2
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 % Absolute expanded uncertainty in %
synthetic natural gas carbon dioxide 5 to 50 0.5
synthetic natural gas ethane 5 to 100 0.5
synthetic natural gas hexane 0.1 to 1 1.0
synthetic natural gas isobutane 0.5 to 10 0.8
synthetic natural gas isopentane 0.2 to 2 0.81
synthetic natural gas methane 700 to 980 5.0E-2
synthetic natural gas n-butane 0.5 to 10 0.79
synthetic natural gas n-pentane 0.2 to 2 0.79
synthetic natural gas nitrogen 5 to 100 0.5
synthetic natural gas propane 1 to 20 0.51
  • Mechanism for measurement service delivery : Calibration
  • Approved on 28 July 2022
  • Institute service identifier : CMI - 1014
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance content in mol/kg Absolute expanded uncertainty in mol/kg Amount-of-substance content in mol/kg Absolute expanded uncertainty in mol/kg
water Total acid content expressed as hydrochloric acid 0.09 to 0.11 5.3E-6
  • Uncertainty equation CMC :
     
     
  • Mechanism for measurement service delivery : Calibration service.
  • Approved on 11 April 2021
  • Institute service identifier : 616-Coul-0.1
Fibre optics , Wavelength : 400 nm to 1650 nm
Wavelength meter
Relative expanded uncertainty : 1.0E-7
Primary wavelength standard or other frequency stabilized laser
CW Single fequency, Power level : > 0.05 mW
Measurements can be made at other wavelengths within this range, depending on the availability of a suitable laser source.
Approved on 20 April 2017
Photometry , Luminous intensity : 1 cd to 1.00E4 cd
Tungsten lamp
Relative expanded uncertainty : 0.9 % to 0.8 %
Photometric bench and reference lamps or photometer
Correlated colour temperature : 2000 K to 2856 K
Services available also for other sources than tungsten lamps, with uncertainty evaluated for specific sources.
Approved on 20 April 2017
Photometry , Luminous intensity : 1 cd to 1.00E4 cd
Tungsten lamp
Relative expanded uncertainty : 0.8 % to 0.9 %
Photometric bench and reference lamps or photometer
Correlated colour temperature : 2856 K to 3200 K
Services available also for other sources than tungsten lamps, with uncertainty evaluated for specific sources.
Approved on 20 April 2017
Spectral properties of materials , Absorbance, regular, spectral : 0 to 0.19
Spectrally-neutral material
Absolute expanded uncertainty : 3.0E-4 to 5.0E-4
Reference spectrometer
Wavelength : 380 nm to 1000 nm
Bandwidth : < 3 nm
Approved on 20 April 2017
Properties of detectors , Responsivity, spectral, irradiance
Broad band detectors
Relative expanded uncertainty : 0.5 %
Double grating monochromator and reference detectors
Wavelength : 405 nm to 920 nm
Bandwidth : < 10 nm
Power level : < 30 mW
Other types of detector can also be calibrated.
Approved on 20 April 2017

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