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The BIPM key comparison database
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METROLOGY AREA
Mass (90)
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Acoustics, Ultrasound, and Vibration (17)
Ionizing Radiation (10)
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Key comparisons (200)
Supplementary comparisons (68)
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Approved for equivalence (157)
Approved and published (49)
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Report in progress, Draft A (5)
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ORGANISATIONS
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Result of the search
Your query 'Mexico' produced 268 results New search
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  SIM.L- K1.2007.1 Calibration of gauge blocks
2018 - 2019
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Status   In progress
  AFRIMETS.M.D- S4 Hydrometers calibration
2017
Comparison type, Field   Supplementary comparison in Mass, Density
Status   Planned
  SIM.M.FF- K6.2017 Low pressure gas flow
2017 - 2018
Comparison type, Field   Key comparison in Mass, Fluid Flow
Calibration of gas flow meters at low flowrates and low pressure, using air
Parameter(s)   Temperature and pressure
Status   Planned
  CCAUV.A- K6 Primary pressure calibration of laboratory standard microphones LS2P
2019 - 2020
Comparison type, Field   Key comparison in Acoustics, Ultrasound, and Vibration, Acoustics
Status   Protocol complete
  CCEM- K5.2017 Active power at 53 Hz
2018 - 2019
Comparison type, Field   Key comparison in Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Status   In progress
  SIM.M.T- S2 Torque wrench calibration
2017
Comparison type, Field   Supplementary comparison in Mass, Torque
Parameter(s)   Temperature ± 1 ° C
Status   Protocol complete
  CCM.F- K23 Force mesaurements
2019 - 2020
Comparison type, Field   Key comparison in Mass, Force
Parameter(s)   Force in compression
Status   Planned
  BIPM.EM- K10.b DC voltage, Josephson standards
1994 -
Comparison type, Field   Key comparison in Electricity and Magnetism, DC Voltage and Current
DC voltage: 10 V
Status   Ongoing, approved for equivalence, Results available
  CCEM- K5 AC power at 50/60 Hz
1996 - 2000
Comparison type, Field   Key comparison in Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Parameter(s)   Power factor: 1.0, 0.5 Lead, 0.5 Lag, 0.0 Lead, 0.0 Lag
Status   Approved for equivalence, Results available
  BIPM.L- K10 Comparison of the frequencies of Helium-Neon lasers at wavelength 633 nm
1988 - 2000
Comparison type, Field   Key comparison in Length, Laser Frequencies
Status   Approved for equivalence, Results available
  CCEM.M- K1 Comparison of low frequency magnetic flux density
2001 -2003
Comparison type, Field   Key comparison in Electricity and Magnetism, Magnetism
Parameter(s)   Frequency: DC to 20 kHz
Status   Approved for equivalence, Results available
  SIM- EUROMET.M.P- BK3 Pressure measurements in gas (absolute mode)
2001 - 2002
Comparison type, Field   Key comparison in Mass, Pressure
Pressure: 3 mPa to 0.9 Pa
Status   Approved for equivalence, Results available
  SIM.M.P- K7 Pressure measurements in liquid (gauge mode)
2001
Comparison type, Field   Key comparison in Mass, Pressure
Pressure: 10 MPa to 100 MPa
Status   Report in progress, Draft B
  CCQM- K9 pH measurement of phosphate buffer solutions
1999 - 2000
Comparison type, Field   Key comparison in Amount of Substance, Electrochemistry
Parameter(s)   15 °C, 25 °C and 37 °C plus 7 other temperatures
Status   Approved for equivalence, Results available
  CCQM- K14 Calcium in human serum
2003
Comparison type, Field   Key comparison in Amount of Substance, Inorganics
Status   Approved for equivalence, Results available
  CCQM- K23.a Natural gas type I
2004 - 2005
Comparison type, Field   Key comparison in Amount of Substance, Gases
Status   Approved for equivalence, Results available
  CCQM- K25 PCBs in sediments
2002
Comparison type, Field   Key comparison in Amount of Substance, Organics
Mass fractions of PCBs from 9 ng/g to 35 ng/g
Status   Approved for equivalence, Results available
  CCL- K1 Gauge blocks by interferometry
1998 - 1999
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Steel and tungsten carbide materials
Status   Approved for equivalence, Results available
  CCL- K3 Angle standards
2000 - 2002
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Status   Approved for equivalence, Results available
  CCL- K4.a Diameter standards
2000 - 2002
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Internal diameter
Status   Approved for equivalence, Results available