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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
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CIPM MRA PARTICIPANTS
CMC statistics
CMC statistics
Comparison statistics
Key comparisons by state or economy
Supplementary comparisons by state or economy
More comparison statistics
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General physics
Acoustics, Ultrasound, Vibration
Electricity and Magnetism
Length
Mass and related quantities
Photometry and Radiometry
Thermometry
Time and Frequency
Chemistry and Biology
Chemistry and Biology
Ionizing radiation
Ionizing Radiation
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Added keywords act as an additional filter. Keywords separated by a space will be treated by the logical function AND automatically. You may also use OR. Keyword searches also find close matches. Placing quotation marks (") before and after the search word, e.g. "word", will allow for exact matches.
All branches
Dimensional metrology
Laser frequencies
All services
Angle
Complex geometry
Form
Linear dimensions
Radiations of the mise en pratique
Various dimensional
All sub services
Angle artefacts
Angle by circle dividers
Angle instruments
Angle prisms
Coordinate Measuring Machine (CMM) artefacts
Cylindricity standards
Diameter standards
End standards
Flatness standards
Gear standards
Hand instruments
Hardness
Lamp radiations
Laser radiations
Layer thickness
Length instruments
Line standards
Long distance
Optical standards
Pressure artefacts
Reference materials
Roundness standards
Screw standards
Small-angle generators
Standards of 1D Dimensions
Straightness standards
Surface texture standards
Thermal expansivity
Two-dimension and three-dimension instruments
Individual service
(Bevel) protractor
(Flatness, wavefront) interferometer
(Groove) depth (step height) standard
(Laser, length) interferometer (system, optics, refractometer)
(Surveyor, engineer, pi) tape, (geodetic) wire
90° (steel, granite, try) square
90° cylinder square
Angle block
Autocollimator
Ball (hole, bore) plate
Ball bar
Bevel gear
Caliper
Clinometer
CMM
Cone (taper) gauge
Cylindrical straightness standard
Depth gauge
Depth micrometer
Dial gauge
Dial-indicator tester
EDM instrument
Electronic level
Engineer or machinist scale, steel
External API screw thread gauge
External cylinder
External cylinder
External cylinder (plug, piston, pin, wire)
External micrometer
Feeler (thickness) gauge
Form measuring machine
Frequency stabilized laser
Gap gauge
Gauge block
Gauge block comparators
Gear involute master
Gear lead master
Gear pitch master
Geodesic baseline
Grid plate
Hardness indenter (Rockwell, Vickers)
Height measuring instrument
Index table
Internal API screw thread gauge
Internal cylinder
Internal cylinder
Internal cylinder (ring)
Internal three-point (bore) micrometer
Internal two-point (bore) micrometer
Involute gear
Large CMM artefact
Laser tracking measuring system
Layer thickness standard
Length bar (long gauge block)
Lens, radius standards
Linewidth standard
Magnification standard (e.g. flick standard)
Measuring microscope
Measuring projector
Micrometer head
Motion (translation, angle) stage
One-dimension displacement transducer or actuator (LVDT, PZT, etc.)
One-dimension grating
One-dimension measuring machine
Optical flat
Optical parallel or wedge
Optical polygon
Optical square (pentaprism)
Piston - cylinder assembly
Plane or thread micrometer setting rod
Precision line scale
Profile coordinate standard
Profile instruments
Reference software
Retroreflection (cube-corner, cat-eye) prism
Rotary table, rotary encoder scale
Roughness standard
Sieve or mesh opening
Sine bar or table
Snap gauge (internal, external)
Soft gauge standard
Spacing standard
Spectral lamp
Sphere (ball)
Sphere (hemisphere)
Spirit (bubble) level
Squareness tester
Stage micrometer
Standard of 1D point-to-point dimensions
Standard particle
Step gauge
Straight edge
Straightness of guideway
Surface plate
Surveyor levelling rod
Test circle for imaging probing systems
Theodolite
Thermal expansion artefact
Thread plug, plain
Thread plug, tapered
Thread ring, plain
Thread ring, tapered
Tip-condition standard
Two-dimension grating
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Mexico
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Mongolia
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Netherlands
New Zealand
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Numerical search allows additional filtering on the measurand value and associated uncertainty. Empty minimum and maximum fields will be treated as negative and positive infinity, respectively.
Numerical search does not apply to Certified Reference Materials
All units
"
%
%
'
(dimensionless)
GHz
Hz
K<sup>-1</sup>
L
MHz
THz
am
arcsecond
arcsecond
arcsecond
cm<sup>2</sup>
cm<sup>3</sup>
degree
dimension 1
diopter
faces
fm
full-circle divisions
kHz
km
m
m/m
m<sup>-1</sup>
m<sup>2</sup>
m<sup>3</sup>
mL
minute
minute
minute
mm
mm/m
mm/mm
mm<sup>2</sup>
mm<sup>3</sup>
mrad
mrad
nm
nm<sup>2</sup>
pm
prism diopter
rad
second
°
µHz
µL
µm
µm/m
µrad
μm
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Numerical formats using the decimal point and scientific notation are accepted, e.g. 12.3 or 3.2E+05
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