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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)

India, BARC (Bhabha Atomic Research Centre)

Ionizing radiation

Activity , Single nuclide solution : 1.80E5 Bq to 6.00E7 Bq

Relative expanded uncertainty 2 %

High pressure well type ionization chamber

Fe-59, 1 g in Injection Glass Vial or 3.6 g in NIST ampoule

Reference standard : 4πβγ-coincidence counting

Source of traceability : BARC

Approved on 27 November 2025

Institute service identifier : APM-RAD-BARC-2005

CMC ID : APMP-RI-IN-00000PQJ-1

Ionizing radiation

Kerma/rate , Protection level ionization chamber : 0.6 mGy/h to 300 mGy/h

Relative expanded uncertainty 2 %

Calibration in air against primary standard (Free Air Chamber), free in air

X-ray, 50 kV to 300 kV, Wide Spectrum, 80 kV to 200 kV at 2.0 m

Reference standard : Free Air Ionization Chamber

Source of traceability : BARC

Approved on 09 April 2026

Institute service identifier : APM-RAD-BARC-1018

CMC ID : APMP-RI-IN-00000PF5-1

Ionizing radiation

Activity , Single nuclide solution : 3.70E5 Bq to 3.70E7 Bq

Relative expanded uncertainty 2.2 %

4πβγ-coincidence counting, balance

Ge-68/Ga-68, 1 g of radioactive solution in a glass ampoule

Reference standard : 4πβγ-coincidence counting, standard set of weights

Source of traceability : BARC

Approved on 19 December 2025

Institute service identifier : APM-RAD-BARC-2029

CMC ID : APMP-RI-IN-00000PR7-1

Ionizing radiation

Activity , Single nuclide solution : 6.90E4 Bq to 2.30E7 Bq

Relative expanded uncertainty 1 %

4πβγ-coincidence counting, balance

Co-60, 1 g of radioactive solution in a glass ampoule

Reference standard : 4πβγ-coincidence counting, standard set of weights

Source of traceability : BARC

Approved on 22 December 2025

Institute service identifier : APM-RAD-BARC-2026

CMC ID : APMP-RI-IN-00000PR5-1

Ionizing radiation

Activity , Single nuclide, solid source : 3700 Bq to 4.00E5 Bq

Relative expanded uncertainty 5 %

HPGe gamma spectrometer

Co-60, Small point source covered with thin plastic window. Active area < 5mm diameter

Reference standard : 4πβγ-coincidence counting

Source of traceability : BARC

Approved on 27 November 2025

Institute service identifier : APM-RAD-BARC-2019

CMC ID : APMP-RI-IN-00000PQY-1

Ionizing radiation

Activity , Single nuclide solution : 6.90E4 Bq to 2.30E7 Bq

Relative expanded uncertainty 2 %

High pressure well type ionization chamber

Co-60, 1 g in Injection Glass Vial or 3.6 g in NIST ampoule

Reference standard : 4πβγ-coincidence counting

Source of traceability : BARC

Approved on 27 November 2025

Institute service identifier : APM-RAD-BARC-2003

CMC ID : APMP-RI-IN-00000PQH-1

Ionizing radiation

Activity , Single nuclide solution : 1.80E5 Bq to 6.00E7 Bq

Relative expanded uncertainty 1.1 %

4πβγ-coincidence counting, balance

Fe-59, 1 g of radioactive solution in a glass ampoule

Reference standard : 4πβγ-coincidence counting, standard set of weights

Source of traceability : BARC

Approved on 19 December 2025

Institute service identifier : APM-RAD-BARC-2028

CMC ID : APMP-RI-IN-00000PQS-1

Ionizing radiation

Absorbed dose/rate , Radiotherapy ionization chamber : 0.0184 Gy/s to 0.0257 Gy/s

Relative expanded uncertainty 1.5 %

Calibration in water phantom by substitution with secondary standard dosimeter

Co-60, 266 TBq (2017), 10 cm x 10 cm field at 80 cm SSD with dosimeter at 5 cm/ 10 cm depth

Reference standard : Secondary standard ionisation chamber FC65G

Source of traceability : BIPM

Approved on 19 February 2026

Institute service identifier : APM-RAD-BARC-1001

CMC ID : APMP-RI-IN-00000PDY-1

Ionizing radiation

Kerma/rate , Radiotherapy ionization chamber : 2.50E-3 Gy/s to 0.0186 Gy/s

Relative expanded uncertainty 1.2 %

Calibration in air by substitution with secondary standard dosimeter

Co-60, 266 TBq (2017) Co-60, at 1 m distance

Reference standard : Secondary standard ionisation chamber FC65G

Source of traceability : BIPM

Approved on 19 February 2026

Institute service identifier : APM-RAD-BARC-1002

CMC ID : APMP-RI-IN-00000PE8-1

Ionizing radiation

Kerma/rate , Protection level ionization chamber : 0.04 mGy/h to 100 mGy/h

Relative expanded uncertainty 2 %

Calibration in air against primary standard (Free Air Chamber), free in air

X-ray, 50 kV to 300 kV, Narrow Spectrum, 60 kV to 300 kV, 1.0 m to 2.0 m

Reference standard : Free Air Ionization Chamber

Source of traceability : BARC

Approved on 19 February 2026

Institute service identifier : APM-RAD-BARC-1017

CMC ID : APMP-RI-IN-00000PF4-1

Ionizing radiation

Activity , Single nuclide, solid source : 3700 Bq to 4.00E5 Bq

Relative expanded uncertainty 5 %

HPGe gamma spectrometer

Fe-59, Small point source covered with thin plastic window. Active area < 5mm diameter

Reference standard : 4πβγ-coincidence counting

Source of traceability : BARC

Approved on 27 November 2025

Institute service identifier : APM-RAD-BARC-2021

CMC ID : APMP-RI-IN-00000PR0-1

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
Matrix or material	Analyte or component	Amount -of-substance fraction in µmol/mol	Relative expanded uncertainty in %	Amount -of-substance fraction in µmol/mol	Relative expanded uncertainty in %
synthetic air	carbon dioxide	50 to 5.00E5	1	50 to 5.00E5	1

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) used for CRM.
Approved on 23 July 2025
Institute service identifier : NPLI/BND 6000
CMC ID : APMP-QM-IN-00000Q92-1

Matrix or material	Analyte or component	Dissemination range of measurement capability		Range of certified values in reference materials
Matrix or material	Analyte or component	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
Matrix or material	Analyte or component	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

Matrix or material	Analyte or component	Dissemination range of measurement capability		Range of certified values in reference materials
Matrix or material	Analyte or component	Amount -of-substance fraction in µmol/mol	Relative expanded uncertainty in %	Amount -of-substance fraction in µmol/mol	Relative expanded uncertainty in %
nitrogen, synthetic air	methane	50 to 2.50E4	0.4	50 to 2.50E4	0.4

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 23 July 2025
Institute service identifier : NPLI/BND 6000
CMC ID : APMP-QM-IN-00000Q94-1

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 : 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

Hardness , Hardness : 20 HRA to 88 HRA

Standard Rockwell hardness block

Absolute expanded uncertainty : 0.3 HRA

Rockwell A, ISO 6508-3

Preliminary test force : 98.07 N

Total test force : 588.4 N, 1471 N

Approved on 28 August 2025

Institute service identifier : NPLI/38-16

CMC ID : APMP-M-IN-00000FXQ-2

Torque , Torque : 2 N m to 2000 N m

Torque measuring device

Relative expanded uncertainty : 1.0E-2 %

Lever deadweight

Mode : clockwise, anti clockwise

Approved on 21 November 2025

Institute service identifier : NPLI/19

CMC ID : APMP-M-IN-00000FYF-2

Mass , Mass : 500 g

Mass standard

Absolute expanded uncertainty : 3.5E1 µg

Comparison in air

Approved on 13 March 2026

Institute service identifier : NPLI/45

CMC ID : APMP-M-IN-00000FY2-3

Select Metrology Area

KCDB

CIPM MRA

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