Comparison Display

CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 10 000 mm²/s at 10 °C

Degrees of equivalence represented by D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in mm²/s.

Kinematic viscosity of liquid B at 10 °C

D_i /(mm²/s)

Participating institutes

Enlarged graph

Graph_LiquidB@10°C

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 4 600 mm²/s at 20 °C

Degrees of equivalence represented by D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in mm²/s.

Kinematic viscosity of liquid B at 20 °C

D_i /(mm²/s)

Participating institutes

Enlarged graph

Graph_LiquidB@20°C

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 100 mm²/s at 100 °C

Degrees of equivalence represented by D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in mm²/s.

Kinematic viscosity of liquid B at 100 °C

D_i /(mm²/s)

Participating institutes

Enlarged graph

Graph_LiquidB@100°C

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 10 000 mm²/s at 10 °C

Degrees of equivalence represented by D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in mm²/s.

LAB_i	D_i	U_neg,i	U_pos,i
	mm²/s	mm²/s	mm²/s
CENAM	3.4	31
GUM	-48	25
INMETRO	-4.1	16
NIM	10	40
NMIJ	1.9	14
PTB	-2.7	25
SMU	-2.7	43
VNIIM	15	19
IPQ	-45	82
NIS	-545	635
SASO-NMCC	-66	42

Participating institutes

CCM.V-K4

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 4 600 mm²/s at 20 °C

Degrees of equivalence represented by D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in mm²/s.

LAB_i	D_i	U_neg,i	U_pos,i
	mm²/s	mm²/s	mm²/s
CENAM	-2.3	15
GUM	-2.7	11
INMETRO	-4.1	6.3
NIM	1.7	15
NMIJ	3.0	4.7
PTB	-1.6	10
SMU	-8.7	17
VSL	-18	18
VNIIM	4.0	5.3
IPQ	-33	41
NIS	151	315
SASO-NMCC	39	18

Participating institutes

CCM.V-K4

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 100 mm²/s at 100 °C

Degrees of equivalence represented by D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in mm²/s.

LAB_i	D_i	U_neg,i	U_pos,i
	mm²/s	mm²/s	mm²/s
CENAM	-0.069	0.24
INMETRO	-0.064	0.10
NIM	0.100	0.22
NMIJ	0.017	0.05
PTB	0.137	0.18
VNIIM	-0.048	0.14
IPQ	-0.320	0.73
NIS	0.260	6.00
SASO-NMCC	0.060	0.32

Participating institutes

CCM.V-K4

Comparison

Comparison close

CCM.V-K4.B

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Information & contact
Participants

Metrology area, Sub-field	Mass and related quantities, Viscosity
Description	Viscosity measurements of standard liquids
Time of measurements	2018
Status	Approved for equivalence

Final Reports of the comparisons	Metrologia 2025 62 Tech. Suppl. 07002
Measurand	Kinematic viscosity 10 000 mm²/s at 10 °C 4 600 mm²/s at 20 °C 100 mm² /s at 100 °C
Parameters	Tempertaure at 10 °C, 20 °C, and 100 °C
Transfer device	Standard liquid B : poly-alpha-olefin

Comparison type	Key Comparison
Consultative Committee	CCM (Consultative Committee for Mass and Related Quantities)
Conducted by	CCM (Consultative Committee for Mass and Related Quantities)
Pilot institute	CENAM Centro Nacional de Metrologia Mexico
Contact person	Sonia Trujillo Juarez +52 442 11 0500

Pilot laboratory
CENAM	Centro Nacional de Metrologia, Mexico, SIM

GUM	Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET

INMETRO

Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM

IPQ	Instituto Portugues da Qualidade, Portugal, EURAMET

NIM	National Institute of Metrology, China, APMP

NIS	National Institute for Standards, Egypt, AFRIMETS

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

PTB	Physikalisch-Technische Bundesanstalt, Germany, EURAMET

SASO-NMCC

National Measurement and Calibration Center - Saudi Standards, Metrology and Quality Organization, Saudi Arabia, GULFMET

SMU	Slovensky Metrologicky Ustav, Slovakia, EURAMET

VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

VSL	VSL, Netherlands, EURAMET

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 10 000 mm²/s at 10 °C

The key comparison reference value x_R and its associated standard uncertainty u_R are computed from the median of the reported results, using the Monte-Carlo method from 1 000 000 trials.

x_R = 10 269.03 mm²/s u_R = 5.66 mm²/s

The degree of equivalence of laboratory i relative to the key comparison reference value x_R is given by a pair of terms, both expressed in mm²/s:

D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence.

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 4 600 mm²/s at 20 °C

The key comparison reference value x_R and its associated standard uncertainty u_R are computed from the weighted mean of the reported results.

x_R = 4 662 mm²/s u_R = 1.50 mm²/s

The degree of equivalence of laboratory i relative to the key comparison reference value x_R is given by a pair of terms, both expressed in mm²/s:

D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 (u_i² - u_R²)^1/2

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 100 mm²/s at 100 °C

The key comparison reference value x_R and its associated standard uncertainty u_R are computed from the weighted mean of the reported results.

x_R = 100.649 mm²/s u_R = 0.025 mm²/s

The degree of equivalence of laboratory i relative to the key comparison reference value x_R is given by a pair of terms, both expressed in mm²/s:

D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 (u_i² - u_R²)^1/2

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 10 000 mm²/s at 10 °C

Lab_i	x_i	u_i
Lab_i	mm²/s	mm²/s
CENAM	10272.54	17
GUM	10221.00	11
INMETRO	10265.05	7.7
NIM	10279.00	21
NMIJ	10271.00	6.2
PTB	10266.48	13
SMU	10266.42	23
VNIIM	10284.00	8.0
IPQ	10223.99	40
NIS	9723.97	318
SASO-NMCC	10203.43	20

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 4 600 mm²/s at 20 °C

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	mm²/s	mm²/s
CENAM	4659.4	7.7
GUM	4659.0	5.6
INMETRO	4657.6	3.5
NIM	4663.4	7.7
NMIJ	4664.7	2.8
PTB	4660.1	5.4
SMU	4653.0	8.4
VSL	4643.8	9.3
VNIIM	4665.7	3.0
IPQ	4628.4	20
NIS	4813.2	157
SASO-NMCC	4700.8	9.2

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CCM.V-K4.B

MEASURAND Kinematic viscosity

NOMINAL VALUE 100 mm²/s at 100 °C

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	mm²/s	mm²/s
CENAM	100.580	0.126
INMETRO	100.585	0.055
NIM	100.752	0.116
NMIJ	100.666	0.035
PTB	100.787	0.096
VNIIM	100.602	0.065
IPQ	100.327	0.366
NIS	100.909	2.890
SASO-NMCC	100.709	0.161

KCDB

CIPM MRA

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Key and supplementary comparisons - Print out