International

International Memberships

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  • Metre Convention (Diplomatic Treaty) - since 2001
  • International Committee of Weights and Measures Mutual Recognition Arrangement (CIPM-MRA) - since 2001
  • Asia Pacific Metrology Programme (APMP) - since 1977
  • Asia Pacific Legal Metrology Forum (APLMF) - since 1999
  • ASEAN Consultative Committee Standards and Quality (ACCSQ) - since 1993
  • National Conference of Standards Laboratories International (NCSLI, USA) - since 2010

International Comparison

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The Mutual Recognition Arrangement of International Committee for Weights and Measures (CIPM MRA) is the supporting structure through the National Metrology Institutes (NMIs) in corroborate the international equivalence of their measurement standards and the calibration and measurement certificates issued by them. The technical basis of CIPM MRA is the set of results obtained for certain range of time through scientific key comparison carried out by the Consultative Committees (CCs) of the CIPM, the International Bureau of Weights and Measures (BIPM) and the Regional Metrology Organizations (RMOs).  Essentially, there are two types of key comparisons:

  • CIPM key comparisons – The international scope that carried out by those participants that having the highest level of skills in related measurement. This type of comparisons are restricted to laboratories of Member States. From CIPM key comparisons, the reference value will be delivered for the chosen key quantity.
  • RMO key comparisons – The regional scope (SIM, AFRIMET, EURAMET, APMP, COOMETS, GULFMETS) organized at the scale of a region (may include the additional participants from other regions) and open to the laboratories of associates as well as Member States. From these key comparisons, the complementary information will be delivered without any change in the reference value.

The CIPM relegates the task of organizing the comparisons to Consultative Committees (CCs). Each CC chooses the key quantities to be compared in its field of expertise, approve the protocols of the key comparisons, and approves their results before getting published in the key comparison database (KCDB).

The RMOs organize related RMO key comparisons with a number of common participants and with protocols allowing their results to be linked to those of the CC key comparison once these are treated in terms of equivalence. The nomenclature used in KCDB reflects this organization; for instance CCAUV.A-K1 is the CC comparison to which the regional equivalents APMP.AUV.A-K1, EURAMET.AUV.A-K1, etc are linked.

CC and RMO key comparisons are carried out over specific given period of time. The result then analysed and published. The procedure may be repeated, in part or in full according to need. However, different organizational scheme is required the unique international facilities that kept in BIPM, Paris. For these, comparisons are organized as ongoing the series of bilateral comparisons between the BIPM and outside laboratories, and continue as long as there is a need.

The results for both of the international comparisons will be published by the BIPM and maintained in the CIPM MRA database (the KCDB).  As dedicated metrology institute, NMIM has participated in RMO key comparisons since 1996 started with vibration acceleration. Calibration and Measurement Capabilities (CMCs) declared by NMIM were respectively added on 4th October 2001 (date of MRA signature by Malaysia).

No.

Name of Comparison

Field

Project No.

Date at NMIM

1.

Automotive Gas mixtures (CO, Propane in Nitrogen)

Gas Metrology

APMP FG CCCA Action III (NMIM & KRISS)

Oct 2020-Feb 2021

2.

Proficiency Testing Scheme on precious metal

Precious Metal

IMBIH.LH-B01.PT/20

August 2020

3.

Regional Key Comparison Pressure Calibration of Laboratory Standard Microphone LS1P

AUV

APMP.AUV.A-K5

August 2020

4.

Comparison on Realization of Aluminium Freezing Point

Temperature

APMP.T-K4.2

October 2019

5.

CH4 in Nitrogen

Gas Metrology

APMP.QM-S7.1

June 2018

6.

Comparison of Blackbody for clinical infrared ear thermometer     

(35.5 oC – 41.5  oC).

Radiation Thermometry

APMP T-S15

2018

7.

APMP TCTF Stopwatch Comparison

Time and Frequency (Time Interval Measurement)

July 2018 – June 2019

8.

Bilateral Comparison of Tachometer

Time and Frequency (Time Interval Measurement)

Bilateral ( Malaysia & Panama)

January – May 2018

9.

Comparison on pH measurement (phthalate buffer)

Electrochemistry

APMP.QM-K91

2015

10.

Determination of elements (calcium and cadmium) in drinking water

Inorganic

APLAC T095

2015

11.

Propane in nitrogen

Gas Analysis

APMP.QM-K111

2014 - 2015

12.

Comparison of high dew point temperature

Thermometry, Humidity

APMP.T-K8

2014

13.

Data acquisition and process in qNMR method

Organic

CCQM P150

2014

14.

Local realization of radiation thermometer scale from silver point to 2800 °C

Temperature: 960 °C to 2800 °C

Thermometry, Pyrometry

APMP.T-S12

2013 - 2016

15.

Local realization of radiation thermometer scale from indium point to 2000 °C.

Temperatures from 156 °C to 2000 °C, and indium, tin, zinc, aluminium, silver and copper points

Thermometry, Pyrometry

APMP.T-S11

2013 - 2016

16.

Arsenic and cadmium measurement in brown rice

Inorganic

APMP.QM-P21

2013

17.

Pb, As and Hg measurements in cosmetic (cream)

Inorganic

APMP.QM-P24

2013

18.

pH measurement of borate buffer, pH 9.18

Electrochemistry

APMP.QM-K19

2013

19.

Luminous intensity in cd

Photometry and Radiometry, Photometry

APMP.PR-K3.a

2012 - 2014

20.

L-Valine (Characterization of organic substances for chemical purity)

Organic

CCQM-K55.c

2012

21.

Power in 50 ohm coaxial lines

Calibration factor

Frequency: 10 MHz, 50 MHz, 1 GHz, 4 GHz, 8 GHz, 12 GHz, 15 GHz, and 18 GHz

Electricity and Magnetism, Radio frequencies

APMP.EM.RF-K8.CL

2012 - 2013

22.

Trace and Essential elements in Herba Ecliptae

Inorganic

APMP.QM-P18

2011

23.

Determination of ethanol in aqueous matrix

Organic

AFRIMETS.QM-K27

2011

24.

Pesticide residue in tea

Organic

APMP PT 11-02

2011

25.

Essential and Toxic Elements in Seafood

Inorganic

APMP.QM.S5

2011

26.

Comparison on digital multimeter

DC voltage, current and resistance
AC voltage and current

Electricity and Magnetism, DC Voltage and Current

APMP.EM-S8

2011 - 2013

27.

Comparison of resistance standards

Resistance: 10 megaohms and 1 gigaohm

Electricity and Magnetism, Resistance

APMP.EM-K2

2010 - 2011

28.

AC power at 50 Hz/60 Hz
Voltage: 120 V
Current: 5 A
Frequency: 53 Hz

Power factor: 1.0, 0.5 Lead, 0.5 Lag, 0.0 Lead, 0.0 Lag

Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer

APMP.EM-K5.1

2010 - 2013

29.

DC voltage, Zener diode

DC voltage: 1.018 V and 10 V

Electricity and Magnetism, DC Voltage and Current

APMP.EM.BIPM-K11.3

2009 - 2011

30.

pH measurement of phosphate buffer solutions (pH ~ 6.86)

Electrochemistry

APMP.QM.K9

2009 - 2010

31.

Comparison of sound calibrators

Sound pressure level: 94 dB and 114 dB

Frequency: 31.5 Hz to 16000 Hz

Acoustics, Ultrasound, and Vibration, Acoustics

APMP.AUV.A-S1

2008 - 2010

32.

Diameter standards

Internal diameter: 5 mm to 100 mm
External diameter: 2 mm to 100 mm

Length, Dimensional Metrology

APMP.L-K4

2008 - 2010

33.

Comparison of water triple point cells

Temperature: 273.16 K

Thermometry, Fixed Point Cells

APMP.T-K7

2007 - 2009

34.

Pressure measurements in oil (gauge mode)

Pressure: 10 MPa to 100 MPa

Mass, Pressure

APMP.M.P-K7.1

2007

35.

Gauge block by mechanical comparison

Central length of gauge block
Steel: 1 mm, 5 mm, 10 mm, 50 mm and 100 mm
Tungsten carbide: 1 mm, 5 mm, 10 mm, 50 mm and 100 mm

Length, Dimensional Metrology

APMP.L-S3

2006 - 2009

36.

Luminous flux

Photometry and Radiometry, Photometry

APMP.PR-K4

2006 - 2007

37.

Comparison using Type R thermocouples

Temperature: 0 °C to 1100 °C

Thermometry, Thermocouples

APMP.T-S1

2005 - 2006

38.

Gauge blocks by interferometry

Central length: 0.5 mm to 100 mm

Length, Dimensional Metrology

APMP.L-K1.1

2005 - 2006

39.

Comparison of industrial thermometers

Temperature: -40 °C to 250 °C

Thermometry, Industrial Thermometry

APMP.T-S3

2004

40.

Comparison of primary wavelength standards

Absolute frequency of the reference component of the recommended radiation at wavelength 633 nm for the practical realization of the definition of the metre

Length, Laser Frequencies

APMP.L-K11

2004

41.

Comparison of capacitors

Capacitance: 10 pF

Frequency: 1592 Hz

Electricity and Magnetism, Capacitance

APMP.EM-K4.1

2004 - 2006

42.

Comparison of laboratory standard microphone calibrations.

Sound pressure.

Frequency: 63 Hz to 8 kHz

Acoustics, Ultrasound, and Vibration

APMP.AUV.A-K1

2004 - 2005

43.

Comparison of local realizations of Aluminium freezing-point temperatures

Temperature: 660.323 °C

Thermometry, Fixed Point Cells

APMP.T-K4

2003 - 2005

44.

Comparison of capacitors

Capacitance: 100 pF

Frequency: 1.592 kHz, 1 kHz

Electricity and Magnetism, Capacitance

APMP.EM-S7

2003 - 2006

45.

Pressure measurements in oil (gauge mode)

Pressure: 10 MPa to 100 MPa

Mass, Pressure

APMP.M.P-K7

2002 - 2004

46.

Gauge blocks by interferometry

Central length: 0.5 mm to 100 mm

Length, Dimensional Metrology

APMP.L-K1

2001 - 2002

47.

AC/DC Transfer

Voltage: 3 V
Frequency: 1 kHz, 20 kHz, 100 kHz and 1 MHz

Electricity and Magnetism AC Voltage, Current, Power, and AC/DC Transfer

APMP.EM-K6.a

2000 - 2003

48.

Realizations of the ITS-90 from 234.3 K to 692.7 K

Temperature: 234.3 K to 692.7 K

Thermometry, Standard Platinum Resistance Thermometers

APMP.T-K3

2000 - 2003

49.

Long gauge blocks from 200 to 500 mm

Length: 200 mm, 250 mm and 500 mm

Length, Dimensional Metrology

APMP.L-K2

2000 - 2002

50.

Comparison of humidity standards: dew point temperature

Temperature: -60 °C to 20 °C, with 5 °C step

Thermometry, Humidity

APMP.T-K6

1999 - 2001

51.

Comparison of mass standards

Mass: 1 kg

Mass, Mass Standards

APMP.M.M-K1

1999 - 2001

52.

Effective area of a piston-cylinder Unit Pressure: 20 kPa to 105 kPa

Mass, Pressure

APMP.M.P-K6

1998 - 2001

53.

Vibration acceleration

Amplified charge sensitivity

Frequency: 10 Hz to 10 kHz

Acoustics, Ultrasound, and Vibration

APMP.AUV.V-K1

1996 - 1997

NMIM Info

NMIM plays an important role in disseminating the traceability of measurement to the whole country based on the International System of Units. Just like other world standard laboratories, NMIM has great responsibility in ensuring the national metrology infrastructures meet and comply with the global measurement standards.

Get In Touch

National Metrology Institute of Malaysia (NMIM)
Lot PT 4803, Bandar Baru Salak Tinggi
43900 Sepang
Selangor Darul Ehsan

Email: irene@sirim.my , serviceNMIM@sirim.my

DID: +603 - 8778 1605

FAX: +603 - 8778 1616