The KCDB - the BIPM key comparison database – supports the CIPM MRA. The KCDB contains information on the internationally recognized Calibration and Measurement Capabilities (CMCs) for services available from the participating institutes, and the key and supplementary comparisons supporting these CMCs.

All data listed in the KCDB have been reviewed and approved within the CIPM Mutual Recognition Arrangement
- CMC Quick search
- CMC Advanced search

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)

Austria, E+E (E+E Elektronik)

Fluid flow ,
Gas flow speed
:
**0.04 m/s to 2 m/s**

Anemometer, air velocity meter

Relative expanded uncertainty

0.4/vref + 0.47

vref: gas flow speed in m/s

The uncertainty is expressed in %

Comparison with Laser Doppler Anemometer

Gas : air

Ambient temperature : (23 ± 3) °C

Relative humidity : (45 ± 20) % rh

Atmospheric pressure : (1000 ± 80) hPa

Approved on 16 November 2012

Institute service identifier : E+E_AV_2

Fluid flow ,
Gas flow speed
:
**0.3 m/s to 40 m/s**

Anemometer, air velocity meter

Relative expanded uncertainty

0.4/vref + 0.47

vref: gas flow speed in m/s

The uncertainty is expressed in %

Comparison with Laser Doppler Anemometer

Gas : air

Atmospheric temperature : 5 °C to 80 °C

Relative humidity : (45 ± 20) % rh

Atmospheric pressure : (1000 ± 80) hPa

Approved on 16 November 2012

Institute service identifier : E+E_AV_1

Brazil, LNMRI/IRD (Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD)

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **2600 Bq/g to 2.60E6 Bq/g**

Relative expanded uncertainty **5.2 %**

Germanium spectrometer, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2045

Ionizing radiation

Activity per unit mass
,
Multi nuclide, solution
: **500 Bq/g to 1.00E5 Bq/g**

Relative expanded uncertainty **5 %**

Germanium spectrometer, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2048

Ionizing radiation

Emission rate
,
Single nuclide, solid
: **100 s**^{-1} to 1.00E6 s^{-1}

Relative expanded uncertainty **5 %**

Germanium spectrometer, measured or calculated efficiency

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2057

Ionizing radiation

Activity per unit mass
,
Multi nuclide, solution
: **500 Bq/g to 1.00E5 Bq/g**

Relative expanded uncertainty **5 %**

Germanium spectrometer, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2048

Ionizing radiation

Activity per unit mass
,
Single nuclide, solid
: **520 Bq/g to 7.40E5 Bq/g**

Relative expanded uncertainty **3 %**

Planar NaI(Tl) crystals, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2059

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **3.70E4 Bq/g to 1.00E9 Bq/g**

Relative expanded uncertainty **0.9 %**

Pressurized ionization chamber, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2001

Ionizing radiation

Activity
,
Single nuclide, solid
: **100 Bq to 5.00E4 Bq**

Relative expanded uncertainty **4 %**

Germanium spectrometer, measured or calculated efficiency

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2018

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **3.70E5 Bq/g to 1.00E10 Bq/g**

Relative expanded uncertainty **0.8 %**

Pressurized ionization chamber, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2002

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **520 Bq/g to 7.40E5 Bq/g**

Relative expanded uncertainty **3.1 %**

Planar NaI(Tl) crystals, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2060

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **50 Bq/g to 1.00E6 Bq/g**

Relative expanded uncertainty **3 %**

Germanium spectrometer, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2028

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **3.70E4 Bq/g to 1.00E9 Bq/g**

Relative expanded uncertainty **2.5 %**

Pressurized ionization chamber, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2014

Ionizing radiation

Activity
,
Single nuclide, solid
: **100 Bq to 1.00E5 Bq**

Relative expanded uncertainty **4 %**

Germanium spectrometer, measured or calculated efficiency

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2024

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **6.00E6 Bq/g to 3.00E11 Bq/g**

Relative expanded uncertainty **3 %**

Pressurized ionization chamber, balance

Reference standard : 4 pi [e+X]-gamma anticoincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2087

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **2600 Bq/g to 2.60E6 Bq/g**

Relative expanded uncertainty **5.4 %**

Germanium spectrometer, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2044

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **500 Bq/g to 1.00E5 Bq/g**

Relative expanded uncertainty **3 %**

Germanium spectrometer, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2041

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **50 Bq/g to 1.00E6 Bq/g**

Relative expanded uncertainty **3 %**

Germanium spectrometer, measured or calculated efficiency, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2047

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **7.40E4 Bq/g to 1.00E9 Bq/g**

Relative expanded uncertainty **0.9 %**

Pressurized ionization chamber, balance

Reference standard : 4 pi [e+X]-gamma anticoincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2086

Ionizing radiation

Activity per unit mass
,
Single nuclide, solution
: **3.70E4 Bq/g to 1.00E9 Bq/g**

Relative expanded uncertainty **2.1 %**

Pressurized ionization chamber, balance

Reference standard : 4 pi [e+X]-gamma coincidence, weight set

Source of traceability : LNMRI/IRD

Approved on 11 April 2019

Institute service identifier : SIM-RAD-LNMRI/IRD-2012

Acoustics, Ultrasound, Vibration

This metrology area covers the fields of acoustics, ultrasound and vibration.

Electricity and Magnetism

This metrology area covers the fields of DC and AC measurements, impedance, electric and magnetic fields, radiofrequencies and measurements on materials.

Length

This metrology area covers the fields of laser frequencies and dimensional metrology.

Mass and related quantities

This metrology area covers the fields of mass standards, force, pressure, density, hardness, torque, gravity and viscosity.

Chemistry and Biology

This metrology area covers all fields relevant to chemistry and biology.

Ionizing Radiation

This metrology area covers the fields of dosimetry, radioactivity and neutron measurements.