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CIPM MRA PARTICIPANTS
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General physics
Chemical material
Chemical Analyte
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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)
India, NPLI (CSIR National Physical Laboratory of India)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount -of-substance fraction in µmol/mol Relative expanded uncertainty in % Amount -of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen carbon dioxide 250 to 2.00E5 0.3 250 to 2.00E5 0.3
  • Mechanism for measurement service delivery : Primary reference gas mixtures as Gas-BNDs are disseminated to customers on demand.
  • BND, i.e. Bharatiya Nirdeshak Dravya (Indian Reference Material) is used for CRM
  • Approved on 18 June 2025
  • Institute service identifier : NPLI/BND 6000
  • CMC ID : APMP-QM-IN-00000Q93-1
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount -of-substance fraction in µmol/mol Relative expanded uncertainty in % Amount -of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen carbon monoxide 50 to 2.00E4 4 50 to 2.00E4 4
  • Mechanism for measurement service delivery : Primary reference gas mixtures as Gas-BNDs are disseminated to customers on demand.
  • BND, i.e. Bharatiya Nirdeshak Dravya (Indian Reference Material) is used for CRM
  • Approved on 18 June 2025
  • Institute service identifier : NPLI/BND 6000
  • CMC ID : APMP-QM-IN-00000Q95-1
     
Frequency , Frequency : 5 MHz
Local frequency standard
Relative expanded uncertainty : 2.2E-12 Hz/Hz
Direct frequency measurement
Gate Time : 100 s
Number of Measurements : 100
Amplitude : > 1 V (50 ohm)
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/13
CMC ID : APMP-TF-IN-00000PP3-1
 
Frequency , Frequency : 10 MHz
Local frequency standard
Relative expanded uncertainty : 2.2E-12 Hz/Hz
Direct frequency measurement
Gate Time : 100 s
Number of Measurements : 100
Amplitude : > 1 V (50 ohm)
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/14
CMC ID : APMP-TF-IN-00000PP4-1
 
Frequency , Frequency : 10 MHz
Local frequency standard
Relative expanded uncertainty : 2.0E-11 Hz/Hz
Direct frequency measurement
Gate time : 10 s
Number of measurements : 100
Amplitude : > 1 V (50 ohm)
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/8
CMC ID : APMP-TF-IN-000005UH-2
 
Frequency , Frequency : 1 MHz
Local frequency standard
Relative expanded uncertainty : 2.4E-12 Hz/Hz
Direct frequency measurement
Gate Time : 100 s
Number of Measurement : 100
Amplitude : > 1 V (50 ohm)
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/12
CMC ID : APMP-TF-IN-00000PP2-1
 
Frequency , Frequency : 10 MHz
Local frequency standard
Relative expanded uncertainty : 5.8E-13 Hz/Hz
Direct frequency measurement
Gate Time : 500s
Number of Measurements : 200
Amplitude : >1V (50 ohm)
Excluded DUC's Effect
Approved on 31 May 2025
Institute service identifier : NPLI/17
CMC ID : APMP-TF-IN-00000PP7-1
 
Frequency , Frequency : 1 MHz
Local frequency standard
Relative expanded uncertainty : 6.0E-13 Hz/Hz
Direct frequency measurement
Gate Time : 500s
Number of Measurements : 200
Amplitude : >1V (50 ohm)
Excluded DUC's Effect
Approved on 31 May 2025
Institute service identifier : NPLI/15
CMC ID : APMP-TF-IN-00000PP5-1
 
Frequency , Frequency : 10 MHz
Local frequency standard
Relative expanded uncertainty : 3.6E-14 Hz/Hz
Time interval measurement
Measurement time : 86400 s
Amplitude : > 1 V (50 ohm)
Number of measurement : 10
Excluded DUC's Effect
Approved on 31 May 2025
Institute service identifier : NPLI/5
CMC ID : APMP-TF-IN-000005UE-2
 
Frequency , Frequency : 100 MHz
Local frequency standard
Relative expanded uncertainty : 3.6E-13 Hz/Hz
Phase time measurement
Measurement Time : 1s
Excluded DUC's Effect
Approved on 31 May 2025
Institute service identifier : NPLI/18
CMC ID : APMP-TF-IN-00000PP8-1
 
Time scale difference , Time scale difference : -0.5 s to 0.5 s
Local clock vs UTC(NPLI)
Absolute expanded uncertainty : 2 ns
Time interval measurement
1 pps amplitude : > 1 V (50 ohm)
Number of measurements : 100
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/9
CMC ID : APMP-TF-IN-000005U7-4
 
Time interval , Time interval : 1740 s to 8.64E4 s
Time difference meter
Absolute expanded uncertainty : 0.6 s
Time interval measurement
Trigger level : manual press switch
Included DUC's effect and operator response time
Approved on 31 May 2025
Institute service identifier : NPLI/11
CMC ID : APMP-TF-IN-000005U9-2
 
Frequency , Frequency : 1 MHz
General frequency source
Relative expanded uncertainty : 2.4E-11 Hz/Hz
Direct frequency measurement
Gate time : 10 s
Number of measurements : 100
Amplitude : > 1V (50 ohm)
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/6
CMC ID : APMP-TF-IN-000005UF-2
 
Time scale difference , Time scale difference : -0.5 s to 0.5 s
Local clock vs UTC
Absolute expanded uncertainty : 1.4E1 ns
Time interval measurement
1 pps amplitude : > 1 V (50 ohm)
Number of measurements : 100
Prediction time : 45 days
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/10
CMC ID : APMP-TF-IN-000005U8-2
 
Frequency , Frequency : 5 MHz
Local frequency standard
Relative expanded uncertainty : 2.2E-11 Hz/Hz
Direct frequency measurement
Gate time : 10 s
Number of measurements : 100
Amplitude : > 1 V (50 ohm)
Excluded DUC's Effect
Approved on 02 June 2025
Institute service identifier : NPLI/7
CMC ID : APMP-TF-IN-000005UG-2
 
Frequency , Frequency : 5 MHz
Local frequency standard
Relative expanded uncertainty : 5.8E-13 Hz/Hz
Direct frequency measurement
Gate Time : 500s
Number of Measurements : 200
Amplitude : >1V (50 ohm)
Excluded DUC's Effect
Approved on 31 May 2025
Institute service identifier : NPLI/16
CMC ID : APMP-TF-IN-00000PP6-1
 
Frequency , Frequency : 10 MHz
Local frequency standard
Relative expanded uncertainty : 3.6E-13 Hz/Hz
Phase time measurement
Measurement Time : 1s
Excluded DUC's Effect
Approved on 31 May 2025
Institute service identifier : NPLI/20
CMC ID : APMP-TF-IN-00000PPA-1
 
Frequency , Frequency : 5 MHz
Local frequency standard
Relative expanded uncertainty : 3.6E-13 Hz/Hz
Phase time measurement
Measurement Time : 1s
Excluded DUC's Effect
Approved on 31 May 2025
Institute service identifier : NPLI/19
CMC ID : APMP-TF-IN-00000PP9-1
 

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Acoustics, Ultrasound, Vibration

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

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

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

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

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

Ionizing radiation
Ionizing Radiation

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