National Measurement Institute (NMI)

Site

Temperature Standards Project

Accreditation No.

1

Site No.

14108

Date of Accreditation

03 Aug 1999

Address

36 Bradfield Road
Lindfield West, NSW 2070
Australia

measurement.gov.au

Contact

Ms Charmaine Kwan P: +61 (02) 84673836

Availability

Services conditionally available to external clients

National Measurement Institute (NMI) address map

Scope of Accreditation

Print scopes
Temperature Standards Project

ISO/IEC 17025 (2017)

Calibration

  • The uncertainty of measurement is reported as an expanded uncertainty having a level of confidence of 95% unless stated otherwise
Service Product Determinant Technique Procedure Limitations
Temperature metrology - Ancillary temperature measuring equipment Digital voltmeters (DVM) and digital multimeters (DMM); Multi-channel thermocouple data recorders; Process calibrators Volt to temperature conversion Direct measurement by electrical input

Capability

Calibration of thermocouple indicators (simulation only)
With Calibration and Measurement Capability of -
Type T
0.09 °C from 0 °C to 400 °C
Type K, J, and N
0.09 °C from 0 °C to 1100 °C
Type S and R
0.12 °C from 0 °C to 1100 °C
Resistance bridges Resistance to temperature conversion Direct measurement by electrical input

Capability

Calibration of bridges for temperature measurement

With Calibration and Measurement Capability of -

0.1 μΩ/Ω for linearity at 1 Ω, 10 Ω and 100 Ω

1 in 107 for ratio in the range 0 to 5
Type R extension wire; Type S extension wire Volt to temperature conversion Direct measurement by electrical input

Capability

With Calibration and Measurement Capability of -

0.22 μV from 0 °C to 50 °C

Temperature metrology - Humidity measuring equipment Dew point meters; Hygrometers; Psychrometers Dew point; Temperature Comparison with a reference standard

Capability

Calibration of dew point meters
With Calibration and Measurement Capability of -
0.1 K for range of dew point temperature from −30 °C to 80 °C
0.3 K for range of frost point temperature from -30 °C to -60 °C 

Calibration of temperature sensors in dew point meters
with least uncertainties of measurement of -
from 0.28 °C at −20 °C to 0.06 °C at 14 °C in air
0.06 °C from 14 °C to 32 °C in air
from 0.06 °C at 32 °C to 0.37 °C at 80 °C in air

Relative humidity sensors Relative humidity (RH); Temperature Comparison with a reference standard

Capability

Calibration of relative humidity sensors
 With Calibration and Measurement Capability of -


Relative Humidity

5%rh

50%rh

95%rh

0 °C

0.20

0.87

1.39

23 °C

0.19

0.64

1.10

70 °C

0.18

0.50

0.83

80 °C

0.18

0.47

0.79


 with a minimum frost point of −30 °C
 Calibration of temperature sensors for RH sensors and
 electronic psychrometers
 With Calibration and Measurement Capability of -
 from 0.28 °C at −20 °C to 0.06 °C at 14 °C in air
 0.06 °C from 14 °C to 32 °C in air
 from 0.06 °C at 32 °C to 0.37 °C at 80 °C in air

Temperature metrology - Non-contact temperature measuring equipment Clinical infrared thermometers; Radiation pyrometers Temperature Direct measurement against a black body source

Capability

With Calibration and Measurement Capability of -

Radiation pyrometers

from 0.1 °C at −40 °C to 0.3 °C at 250 °C
from 0.5 °C from above 250 °C to 2 °C at 1100 °C
from 2 °C from above 1100 °C to 4 °C at 2900 °C


Calibration of ear thermometers
0.1 °C in the range 25 °C to 45 °C

Thermal imaging systems Temperature Direct measurement against a black body source

Capability

Calibration of thermal imaging cameras

With Calibration and Measurement Capability of -

from 0.1 °C at −40 °C to 0.5 °C at 250 °C
from 0.5 °C from above 250 °C to 2 °C at 1100 °C

Testing of clinical thermal imaging systems for calibration, drift and stability, non-uniformity over the range 33 °C to 40 °C in accordance with 
IEC 80601-2-59 clauses
201.101.3.1 Performance
201.101.5 Minimum resolvable temperature difference RTD
201.101.6 Uniformity of Workable Target Plane
201.101.9 Spatial resolution
SS 582-1 (Singapore) clauses 6.9.5, 6.9.6, 6.9.7, 6.9.8, 6.9.9
Temperature metrology - Temperature measuring equipment Base metal thermocouples mV over oC range Direct temperature and electrical measurement against reference standard

Capability

With Calibration and Measurement Capability of -

Type T

1.0 μV from −200 °C to 0 °C

(1.0 + 0.01% E) μV from above 0 °C to 200 °C

Type K

(1.0 + 0.036% E) μV from −200 °C to 200 °C

(1.0 + 0.055% E) μV from above 200 °C to 400 °C

(4.14 + 0.06% E) μV from above 400 °C to 1100 °C

where E is the thermocouple voltage

Digital temperature measuring systems Temperature Measurement against reference standard

Capability

With Calibration and Measurement Capability of -

Thermocouple Measuring Systems
Type T
1.0 μV from −200 °C to 0 °C
(1.0 + 0.01% E) μV from above 0 °C to 200 °C
Type K
(1.0 + 0.036% E) μV from −200 °C to 200 °C
(1.0 + 0.055% E) μV from above 200 °C to 400 °C
(4.14 + 0.06% E) μV from above 400 °C to 1100 °C
where E is the thermocouple voltage

Metallic resistance Measuring Systems
Calibration of standard PRTs using temperature fixed points
from 1 mK at −189.34 °C to 0.6 mK at −38.83 °C
0.6 mK from −38.83 °C to 419.53 °C
from 0.6 mK at 419.53 °C to 1.6 mK at 660.32 °C
from 1.6 mK at 660.32 °C to 8 mK at 961.78 °C

Calibration of PRTs by comparison against standard PRTs
5 mK at −200 °C
5 mK at −80 °C
3 mK at 0 °C
3 mK at 250 °C
6 mK at 550 °C
8 mK at 960 °C
Digital temperature measuring systems; Surface probes Temperature Measurement against reference standard

Capability

Calibration of surface temperature sensors
With Calibration and Measurement Capability of -
from 0.21 °C at 20 °C to 0.90 °C at 350 °C

Calibration of surface temperature measuring system (calibrators)
With Calibration and Measurement Capability of -
from 0.21 °C at 20 °C to 0.90 °C at 350 °C
Liquid in glass (LIG) thermometers Temperature Measurement against reference standard

Capability

With Calibration and Measurement Capability of -

0.3 °C from −200 °C to −50 °C

25 mK from above −50 °C to −10 °C

5 mK from above −10 °C to 50 °C

3 mK at 0 °C

15 mK from above 50 °C to 100 °C

40 mK from above 100 °C to 250 °C

0.15 °C from above 250 °C to 300 °C

Temperature metrology - Temperature standards and reference equipment Black body sources Temperature Direct measurement using a reference standard

Capability

With Calibration and Measurement Capability of -

from 0.4 °C at −40 °C to 0.3 °C at 50 °C

from 0.3 °C at 50 °C to 1.4 °C at 1000 °C

from 1.4 °C at 1000 °C to 2.9 °C at 2000 °C


Calibration of ear thermometer blackbodies

0.025 °C in the range 25 °C to 45 °C

Dry block calibrators Temperature Direct measurement using a reference standard

Capability

With Calibration and Measurement Capability of -

from 0.15 °C at −50 °C to 0.05 °C at 50 °C
from 0.05 °C at 50 °C to 0.15 °C at 650 °C

Platinum resistance thermometers (PRTs) reference standards Temperature Direct measurement using a reference standard

Capability

Calibration of standard PRTs using temperature fixed points

With Calibration and Measurement Capability of -
from 1 mK at −189.34 °C to 0.6 mK at −38.83 °C
0.6 mK from −38.83 °C to 419.53 °C
from 0.6 mK at 419.53 °C to 1.6 mK at 660.32 °C
from 1.6 mK at 660.32 °C to 8 mK at 961.78 °C


Calibration of PRTs by comparison against standard PRTs
With Calibration and Measurement Capability of -

5 mK at −200 °C
5 mK at −80 °C
3 mK at 0 °C
3 mK at 250 °C
6 mK at 550 °C
8 mK at 960 °C

Platinum-gold (Pt-Au) thermocouples; Rare metal thermocouples mV per oC Direct measurement using a reference standard

Capability

Calibration of Rare Metal Thermocouple

With Calibration and Measurement Capability of -

(0.31 + 0.014% E) μV from 0 °C to 1560 °C
(0.008% E) μV at 200 °C for homogeneity

where E is the thermocouple voltage


Calibration of Pt-Au thermocouples
With Calibration and Measurement Capability of -

19 mK from 0 °C to 50 °C
14 mK from above 50 °C to 420 °C
26 mK from above 420 °C to 960 °C

Temperature reference standards - Fixed points Aluminium (Al) freezing point; Argon (Ar) triple point; Cadmium freezing point; Gallium melting point; Indium (In) freezing point; Mercury (Hg) triple point; Silver (Ag) freezing point; Tin (Sn) freezing point; Water triple point; Zinc freezing point Direct measurement against H2O triple point; Direct measurement against a reference standard; Direct measurement against argon triple point; Direct measurement against mercury triple point

Capability

With Calibration and Measurement Capability of -

1 mK at Ar triple point
0.3 mK at Hg triple point
0.1 mK at water triple point
0.3 mK at Ga melting point
0.5 mK at In freezing point

0.5 mK at Sn freezing point
0.4 mK at Cd freezing point
0.6 mK at Zn freezing point
1.6 mK at Al freezing point
7 mK at Ag freezing point

The only data displayed is that deemed relevant and necessary for the clear description of the activities and services covered by the scope of accreditation.

Grey text appearing in a SoA is additional freetext providing further refinement or information on the data in the preceding line entry.