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 Temperature & Humidity Lab

Temperature
The Temperature laboratory realizes the International Temperature Scale of 1990 (ITS-90) through a set of fixed point cells (TPW, Hg, Ga, In, Sn, Zn and Al) and a set of standard platinum resistance thermometers (SPRTs).
Calibration services provided are:

Standard Platinum Resistance Thermometers
Calibration of Standard Platinum Resistance Thermometers directly at the fixed points of TPW, Hg, Ga, In, Sn, Zn and Al, covering the temperature range from -38.8344 °C to 660.323 °C, with an expanded uncertainty of 0.7 mK to 4 mK.


Platinum Resistance Thermometers​
Calibration of Platinum Resistance Thermometers in comparison with SPRTs, using liquid baths to create uniform and stable temperature conditions, covering the range from -80 °C to 250 °C, with an expanded uncertainty of 0.01 °C to 0.02 °C.


Temperature Sensors With Display Unit/Liquid In Glass Thermometers​
Temperature sensors with display units are calibrated in liquid baths and in block calibrators in comparison with reference thermometers. In liquid baths, the temperature range covered is from -80 °C to 250 °C, with an expanded uncertainty of 0.015 °C to 0.025 °C. Also in block calibrators, the temperature range covered is from 250 °C to 400 °C, with an expanded uncertainty of 0.6 °C to 0.8 °C. Liquid in glass thermometers are calibrated from -60 °C to 250 °C, with an expanded uncertainty of 0.02 °C to 0.05 °C.

Temperature Block Calibrators​
Temperature block calibrators are calibrated using platinum resistance thermometers in the range from -30 °C to 400 °C, with an expanded uncertainty of 0.2 °C.

Liquid Baths
Calibration of liquid baths is done between -80 °C to 250 °C, with an expanded uncertainty of 0.02 °C to 0.03 °C.


Climatic Chambers And Furnaces
Climatic chambers are calibrated in the range between-40 °C to 140 °C, with an expanded uncertainty of 0.2 °C. The temperature profile of the chamber can also be measured using 9 PRT sensors distributed in the working volume of the chamber. If the chamber has the capability to create relative humidity conditions, an additional reference hygrometer is used to measure these conditions. Furnaces can be calibrated in the range of 100 °C to 1100 °C, with an expanded uncertainty of 0.3 °C to 0.8 °C.

​​Humidity

Relative Humidity
The Humidity Laboratory is using a two pressure generator to create reference relative humidity and air temperature conditions. Calibration
Services provided are:

Relative Humidity Sensors
Calibration of relative humidity sensors and data loggers in the range of 10 %rh to 95 % rh and air temperature between 10 °C and 70 °C. The expanded uncertainty of the measurement is 0.3 % rh to 0.8 % rh at 25 °C.

Air Temperature Sensors
Calibration of air temperature sensors and data loggers in the range of 10°C to 70°C, in the chamber of the humidity generator, with an expanded uncertainty of 0.1 °C.



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