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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] = [a² + b²]^1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)

Finland, STUK (Radiation and Nuclear Safety Authority)

Ionizing radiation

Personal dose equivalent/rate, penetrating , Personal dosimeter : 8.00E-7 Sv to 6.4 Sv

Relative expanded uncertainty 5 %

Irradiation or calibration on a water slab phantom

Cs-137, ISO standard 4037-1, 1996

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1028

CMC ID : EURAMET-RI-FI-00000GUA-1

Ionizing radiation

Personal dose equivalent/rate, penetrating , Personal dosimeter : 8.00E-7 Sv to 24 Sv

Relative expanded uncertainty 5 %

Irradiation or calibration on a water slab phantom

Co-60, ISO standard 4037-1, 1996

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1027

CMC ID : EURAMET-RI-FI-00000GU9-1

Ionizing radiation

Kerma/rate , Biological sample, electronic component or other passive object : 8.00E-7 Gy to 1800 Gy

Relative expanded uncertainty 3 %

Irradiation free in air

Co-60, ISO standard 4037-1, 1996. Air kerma rate 30 µGy/h to 25 Gy/h

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1006

CMC ID : EURAMET-RI-FI-00000GTP-1

Ionizing radiation

Directional dose equivalent/rate , Radioprotection dosemeter : 3.00E-5 Sv/h to 3 Sv/h

Relative expanded uncertainty 5 %

Calibration free in air

Co-60, ISO standard 4037-1, 1996

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1017

CMC ID : EURAMET-RI-FI-00000GTZ-1

Ionizing radiation

Absorbed dose/rate , Radiation therapy dosimeters and other targets : 1 mGy/s to 35 mGy/s

Relative expanded uncertainty 0.51 %

Reference value defined by a secondary standard, in water phantom.

Co-60, Co-60

Reference standard : Secondary standard ionization chamber

Source of traceability : BIPM

Approved on 24 July 2024

Institute service identifier : STUK-D2

CMC ID : EURAMET-RI-FI-00000GTT-4

Ionizing radiation

Kerma/rate , Biological sample, electronic component or other passive object : 8.00E-7 Gy to 57 Gy

Relative expanded uncertainty 3 %

Irradiation free in air

Cs-137, ISO standard 4037-1, 1996. Air kerma rate 30 µGy/h to 0.8 Gy/h

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1007

CMC ID : EURAMET-RI-FI-00000GTQ-1

Ionizing radiation

Directional dose equivalent/rate , Radioprotection dosemeter : 3.00E-5 Sv/h to 0.8 Sv/h

Relative expanded uncertainty 5 %

Calibration free in air

Cs-137, ISO standard 4037-1, 1996

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1018

CMC ID : EURAMET-RI-FI-00000GU0-1

Ionizing radiation

Kerma/rate , X-ray dosimeters and other targets : 4.00E-5 mGy/s to 10 mGy/s

Relative expanded uncertainty 1.5 % to 2.4 %

Uncertainty table

{"row_1":{"col_1":"Radiation quality","col_2":"Uncertainty (%), k = 2"},"row_2":{"col_1":"RQR 2","col_2":"1.5"},"row_3":{"col_1":"W-anode based","col_2":"1.8"},"row_4":{"col_1":"Mo-anode based","col_2":"2.4"}}

The uncertainties presented in the table were selected to represent the best measurement capabilities. Details of uncertainties for all radiation qualities, derived quantities and services are given in our quality system.

The reference value of air kerma is realized by a secondary standard ionization chamber and the calibration/irradiation of an item is performed free in air or with a standard phantom.

X-ray, 10 kV to 50 kV, HVL: 0.2 - 2.8 mm Al, e.g.: IEC 61267, ISO 4037 and CCRI qualities

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB, BIPM (CCRI low energies and RQR-M)

Approved on 10 April 2026

Institute service identifier : STUK-D7

CMC ID : EURAMET-RI-FI-00000GTL-2

Ionizing radiation

Ambient dose equivalent/rate , Radioprotection dosemeter : 3.00E-5 Sv/h to 3 Sv/h

Relative expanded uncertainty 5 %

Calibration free in air

Co-60, ISO standard 4037-1, 1996

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1012

CMC ID : EURAMET-RI-FI-00000GTU-1

Ionizing radiation

Absorbed dose/rate , Beta dosimeters and other targets : 5.00E-4 Gy/h to 0.3 Gy/h

Relative expanded uncertainty 4 %

Reference value is defined by a primary standard extrapolation chamber and operational quantities are derived based on ISO-6980 conversion factors. Calibration/irradiations are performed free in air or with a standard phantom.

Beta radiation, Sr-90/Y-90 and Kr-85

Reference standard : Primary standard extrapolation chamber

Source of traceability : STUK

Approved on 02 May 2024

Institute service identifier : STUK-D6

CMC ID : EURAMET-RI-FI-00000GU5-2

Ionizing radiation

Kerma/rate , Radiation therapy dosimeters and other targets : 1 mGy/s to 35 mGy/s

Relative expanded uncertainty 0.47 %

Reference value defined by a secondary standard, free in air

Co-60, Co-60

Reference standard : Secondary standard ionization chamber

Source of traceability : BIPM

Approved on 05 March 2024

Institute service identifier : STUK-D1

CMC ID : EURAMET-RI-FI-00000GTK-2

Ionizing radiation

Ambient dose equivalent/rate , Radioprotection dosemeter : 3.00E-5 Sv/h to 0.8 Sv/h

Relative expanded uncertainty 5 %

Calibration free in air

Cs-137, ISO standard 4037-1, 1996

Reference standard : Secondary standard ionization chamber

Source of traceability : PTB

Approved on 24 January 2012

Institute service identifier : EUR-RAD-STUK-1013

CMC ID : EURAMET-RI-FI-00000GTV-1

Ionizing radiation

Kerma/rate , X-ray dosimeters and other targets : 1.00E-6 mGy/s to 7 mGy/s

Relative expanded uncertainty 1.5 %

Uncertainty table

{"row_1":{"col_1":"Radiation qualities","col_2":"Uncertainty (%), k = 2"},"row_2":{"col_1":"W-anode based","col_2":"1.5"}}

The uncertainty presented in the table was selected to represent the best measurement capability. Details of uncertainties for all radiation qualities, derived quantities and services are given in our quality system.

The reference value of air kerma is realized by a secondary standard ionization chamber and the calibration/irradiation of an item is performed free in air or with a standard phantom.

X-ray, 50 kV to 300 kV, HVL: 1.0 mm Al - 6.2 mm Cu, e.g.: IEC 61267, ISO 4037 and CCRI qualities

Reference standard : Secondary standard ionization chambers

Source of traceability : PTB, BIPM (CCRI medium energies)

Approved on 17 March 2026

Institute service identifier : STUK-D8

CMC ID : EURAMET-RI-FI-00000GTM-2

Ionizing radiation

Activity , Environmental and reference material samples Measurand is expressed in Bq.

Relative expanded uncertainty 4.5 % to 9.5 %

Uncertainty table

{"row_1":{"col_1":"Radionuclide","col_2":"Lower limit activity range [Bq]","col_3":"Upper limit activity range [Bq]","col_4":"Minimum value of uncertainty (k=2)"},"row_2":{"col_1":"Cs-137 Cs-134 Na-22 K-40 Mn-54 Co-57 Co-60 Cd-109 Ba-133 Eu-152 Eu-155 Pb-210 Am-241 Ac-228 Ce-139 Cr-51 Sn-113 Sr-85 Y-88 Zn-65","col_2":"0.013 0.012 0.015 0.019 0.012 0.006 0.013 0.15 0.015 0.02 0.018 0.15 0.016 0.046 0.0075 0.12 0.014 0.016 0.016 0.026","col_3":"50000 50000 30000 50000 50000 30000 30000 50000 30000 50000 50000 300000 30000 100000 100000 300000 50000 50000 50000 100000","col_4":"4.5 % 4.6 % 6.2 % 6.1 % 4.5 % 6.5 % 5.0 % 7.3 % 6.2 % 7.8 % 6.7 % 6.4 % 6.0 % 5.5 % 5.4 % 6.2 % 5.4 % 9.5 % 7.8 % 4.6 %"}}

List of radionuclides, their activity ranges and uncertainties

Gamma ray spectrometry

30 keV - 2700 keV, Marinelli (0.5 L)

Reference standard : Multi-radionuclide solution

Source of traceability : NPL

Approved on 30 October 2025

Institute service identifier : STUK-A1

CMC ID : EURAMET-RI-FI-00000QJ5-1

Norway, DSA (Norwegian Radiation and Nuclear Safety Authority)

Ionizing radiation

Personal dose equivalent/rate, superficial , Dosimeter : 1.00E-4 Sv/h to 0.12 Sv/h

Relative expanded uncertainty 6 %

Irradiation or calibration on a ISO water slab or ISO rod

X-ray, 10 kV to 50 kV, 10 kV to 40 kV ISO 4037-1 narrow beam

Reference standard : Secondary standard ionization chamber

Source of traceability : VSL

Approved on 24 January 2012

Institute service identifier : EUR-RAD-DSA-1021

CMC ID : EURAMET-RI-NO-00000JRH-1

Ionizing radiation

Kerma/rate , Radiodiagnostic dosemeter and dosimeter : 3.00E-4 Gy/h to 0.1 Gy/h

Relative expanded uncertainty 1.8 %

Calibration free in air

X-ray, 50 kV to 420 kV, 60 kV to 300 kV ISO 4037-1 narrow beam

Reference standard : Secondary standard ionization chamber

Source of traceability : VSL

Approved on 24 January 2012

Institute service identifier : EUR-RAD-DSA-1009

CMC ID : EURAMET-RI-NO-00000JRP-1

Ionizing radiation

Personal dose equivalent/rate, penetrating , Dosemeter : 3.00E-4 Sv/h to 0.015 Sv/h

Relative expanded uncertainty 5 %

Irradiation or calibration on a ISO water slab or ISO rod

Cs-137, ISO 4037-1

Reference standard : Secondary standard ionization chamber

Source of traceability : BIPM

Approved on 24 January 2012

Institute service identifier : EUR-RAD-DSA-1019

CMC ID : EURAMET-RI-NO-00000JRG-1

Ionizing radiation

Kerma/rate , Radiotherapy, radiodiagnostic dosemeter : 1.00E-5 Gy/s to 3.00E-3 Gy/s

Relative expanded uncertainty 1 %

Calibration free in air

X-ray, 50 kV to 420 kV, 180 kV, 250 kV, Rapport BIPM 01/04

Reference standard : Secondary standard ionization chamber

Source of traceability : BIPM

Approved on 24 January 2012

Institute service identifier : EUR-RAD-DSA-1007

CMC ID : EURAMET-RI-NO-00000JRO-1

Ionizing radiation

Directional dose equivalent/rate , Radioprotection dosemeter : 3.00E-4 Sv/h to 0.015 Sv/h

Relative expanded uncertainty 5 %

Calibration free in air

Cs-137, ISO 4037-1

Reference standard : Secondary standard ionization chamber

Source of traceability : BIPM

Approved on 24 January 2012

Institute service identifier : EUR-RAD-DSA-1016

CMC ID : EURAMET-RI-NO-00000JRZ-1

Ionizing radiation

Absorbed dose/rate to water , Radiotherapy dosemeter : 0.4 Gy to 50 Gy

Relative expanded uncertainty 1 %

Calibration in water phantom

Co-60, IAEA 398

Reference standard : Two secondary standard ionization chambers

Source of traceability : BIPM

Approved on 24 January 2012

Institute service identifier : EUR-RAD-DSA-1004

CMC ID : EURAMET-RI-NO-00000JRK-1

Select Metrology Area

KCDB

CIPM MRA

CLASSIFICATION OF SERVICES