Temperature/Humidity
ORNL Metrology Laboratory (ORNLML) maintains a variety of temperature and humidity standards traceable to SI (International System of Units) through the National Institute of Standards and Technology (NIST) and other international primary laboratories. These standards generate and measure various temperature and relative humidity properties required to perform traceable calibrations of our customers’ instruments and equipment. ORNLML can provide accredited calibrations for any temperature and relative humidity parameters within the ranges detailed in our Scope of Accreditation. However, traceable non-accredited calibrations are available for temperatures outside of our Scope of Accreditation. The tables below list our accredited capabilities. Our entire Scope of Accreditation can be found at the following link.
Typical types of equipment the ORNLML performs temperature and relative humidity calibrations on are: Thermistors, Standard and Industrial Platinum Thermometers (SPRT, IPRT), Liquid in Glass Thermometers, Thermocouples, Temperature/Humidity Chart recorders, hygrometers
If you have questions about our temperature and relative humidity capabilities, please contact the ORNL Metrology Laboratory for more information.
Humidity
Range in %
|
Best Uncertainty in %*
(+/-) |
10 – 95 RH |
1.2 |
Comparison Thermometery
Range in °C |
Best Uncertainty in °C *
(+/-) |
0 to 100 |
0.0093 |
100 to 419 |
0.265 |
Thermocouples
Type |
Best Uncertainty in °C * (+/-)
(Range 0 to 100 ° in Water) |
Best Uncertainty in °C * (+/-)
(Range 100 to 419 ° in Fluidized Batch) |
B |
n/a |
1.359 |
C |
0.197 |
0.368 |
E |
0.177 |
0.357 |
J |
0.178 |
0.358 |
K |
0.179 |
0.358 |
R |
0.282 |
0.390 |
S |
0.279 |
0.391 |
T |
0.179 |
0.358 |
ITS90 Fixed Point Thermometry
Range in °C |
Best Uncertainty (+/-) in mK |
Remarks |
0.01 |
1.0 |
TPW |
29.7646 |
2.0 |
GaMP |
231.928 |
4.0 |
SnFP |
419.527 |
8.0 |
ZnFP |
|
