Comparison Display

CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 30 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

30 °C

D_i / °C

Participating institutes

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 50 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

50 °C

D_i / °C

Participating institutes

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 65 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

65 °C

D_i / °C

Participating institutes

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 80 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

80 °C

D_i / °C

Participating institutes

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 85 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

85 °C

D_i / °C

Participating institutes

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 90 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

90 °C

D_i / °C

Participating institutes

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 95 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

95 °C

D_i / °C

Participating institutes

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 30 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

LAB_i	D_i	U_neg,i	U_pos,i
	°C	°C	°C
INRIM	-0.006	0.026
NIST	0.000	0.015
NMIJ	-0.006	0.035
KRISS	0.005	0.033
NMC, A*STAR	-0.024	0.071
INTA	-0.001	0.030
E+E	0.002	0.021
NPL	0.005	0.021
PTB	0.000	0.019

Participating institutes

CCT-K8

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 50 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

LAB_i	D_i	U_neg,i	U_pos,i
	°C	°C	°C
INRIM	-0.004	0.030
NIST	0.005	0.020
NMIJ	0.007	0.043
KRISS	0.002	0.040
NMC, A*STAR	-0.010	0.077
INTA	-0.005	0.033
E+E	0.005	0.025
NPL	0.005	0.020
PTB	-0.019	0.029

Participating institutes

CCT-K8

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 65 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

LAB_i	D_i	U_neg,i	U_pos,i
	°C	°C	°C
INRIM	0.000	0.036
NIST	-0.001	0.024
NMIJ	0.011	0.046
KRISS	-0.008	0.038
NMC, A*STAR	-0.020	0.085
INTA	-0.005	0.035
E+E	0.005	0.025
NPL	0.005	0.020
PTB	-0.012	0.035

Participating institutes

CCT-K8

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 80 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

LAB_i	D_i	U_neg,i	U_pos,i
	°C	°C	°C
INRIM	0.000	0.037
NIST	0.007	0.040
NMIJ	0.022	0.056
KRISS	-0.011	0.040
NMC, A*STAR	-0.010	0.089
INTA	-0.003	0.036
E+E	0.005	0.029
NPL	0.000	0.027
PTB	-0.028	0.062

Participating institutes

CCT-K8

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 85 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

LAB_i	D_i	U_neg,i	U_pos,i
	°C	°C	°C
INRIM	-0.004	0.038
NIST	0.008	0.038
NMIJ	0.020	0.060
KRISS	-0.014	0.042
NMC, A*STAR	-0.009	0.12
INTA	-0.004	0.039
E+E	0.000	0.025
NPL	0.002	0.040

Participating institutes

CCT-K8

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 90 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

LAB_i	D_i	U_neg,i	U_pos,i
	°C	°C	°C
INRIM	0.001	0.038
NMIJ	0.016	0.054
KRISS	-0.011	0.052
NMC, A*STAR	-0.014	0.12
INTA	-0.001	0.038
E+E	-0.002	0.025
NPL	0.002	0.065

Participating institutes

CCT-K8

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 95 °C

Degrees of equivalence represented by D_i and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in °C.

LAB_i	D_i	U_neg,i	U_pos,i
	°C	°C	°C
INRIM	0.009	0.070
NMIJ	0.012	0.064
KRISS	-0.009	0.074
INTA	-0.002	0.039
E+E	-0.002	0.026
NPL	-0.001	0.10

Participating institutes

CCT-K8

Comparison

Comparison close

SIM.T-K8

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Information & contact
Participants

Metrology area, Sub-field	Thermometry, Humidity
Description	Comparison of dew point temperatures
Time of measurements	2026 - 2027
Status	Planned

Measurand	Temperature 30 °C, 50 °C, and 65 °C
Transfer device	Chilled-mirror hygrometer

Comparison type	Key Comparison
Consultative Committee	CCT (Consultative Committee for Thermometry)
Conducted by	SIM (Inter-American Metrology System)
Comments	The key comparisons of dew and frost point temperature standards, SIM.T-K6 and SIM.T-K8, are conducted simultaneously over the range -30 °C to 65 °C.
Pilot institute	NIST National Institute of Standards and Technology United States
Contact person	Christopher Meyer +1 301 975 4825
Additional	Javier García Skabar, Instituto Nacional de Tecnologia Industrial Carolina Herrera Ruiz, Laboratorio Costarricense de Metrologia Andrea Sika, Laboratorio Tecnologico del Uruguay

Pilot laboratory
NIST	National Institute of Standards and Technology, United States, SIM

INTI	Instituto Nacional de Tecnologia Industrial, Argentina, SIM

LACOMET

Laboratorio Costarricense de Metrologia, Costa Rica, SIM

LATU	Laboratorio Tecnologico del Uruguay, Uruguay, SIM

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 30 °C

The key comparison reference value x_R and its associated standard uncertainty u_R are computed from the results of participants according to Section 8 of the CCT-K8 Final report where the results of the two comparison loops were harmonized to one single result via the results of INTA, NIST and E+E.

x_R = -0.118 °C u_R = 0.0045 °C

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 °C:

D_i and its expanded uncertainty U_i at a 95 % level of confidence were calculated according to Section 8 of the CCT-K8 Final report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 50 °C

x_R = -0.104 °C u_R = 0.0055 °C

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 °C:

D_i and its expanded uncertainty U_i at a 95 % level of confidence were calculated according to Section 8 of the CCT-K8 Final report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 65 °C

x_R = -0.091 °C u_R = 0.006 °C

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 °C:

D_i and its expanded uncertainty U_i at a 95 % level of confidence were calculated according to Section 8 of the CCT-K8 Final report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 80 °C

x_R = -0.078 °C u_R = 0.007 °C

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 °C:

D_i and its expanded uncertainty U_i at a 95 % level of confidence were calculated according to Section 8 of the CCT-K8 Final report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 85 °C

x_R = -0.073 °C u_R = 0.008 °C

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 °C:

D_i and its expanded uncertainty U_i at a 95 % level of confidence were calculated according to Section 8 of the CCT-K8 Final report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 90 °C

x_R = -0.073 °C u_R = 0.009 °C

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 °C:

D_i and its expanded uncertainty U_i at a 95 % level of confidence were calculated according to Section 8 of the CCT-K8 Final report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 95 °C

x_R = -0.075 °C u_R = 0.011 °C

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 °C:

D_i and its expanded uncertainty U_i at a 95 % level of confidence were calculated according to Section 8 of the CCT-K8 Final report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 30 °C

The summary tables of the participants reported results can be found in Section 12.3 of the CCT-K8 Final report. Details of the local dew point temperature scales for each participant can be found in Section 5 of the report.

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 50 °C

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 65 °C

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CCT-K8

MEASURAND Realization of local scale of dew-point temperature of humid gas

NOMINAL VALUE 80 °C