Inmetro / Scientific / Thermal Metrology Division / Later

Thermometry Laboratory (Later)

Calibration Services

Thermometry by Fixed Point

Platinum resistance thermometer from -190 °C a 660 °C;

Platinum resistance thermometer from -190 °C a 420 °C;

Platinum resistance thermometer from -190 °C a 232 °C;

Platinum resistance thermometer from -190 °C a 157 °C;

Platinum resistance thermometer from -190 °C a 30 °C;

Platinum resistance thermometer from -190 °C a 0 °C;

Platinum resistance thermometer from -39 °C a 660 °C;

Platinum resistance thermometer from -39 °C a 420 °C;

Platinum resistance thermometer from -39 °C a 232 °C;

Platinum resistance thermometer from -39 °C a 157 °C;

Platinum resistance thermometer from -39 °C a 30 °C;

Platinum resistance thermometer from 0 °C a 962 °C;

Platinum resistance thermometer from 0 °C a 660 °C;

Platinum resistance thermometer from 0 °C a 420 °C;

Platinum resistance thermometer from 0 °C a 232 °C;

Platinum resistance thermometer from 0 °C a 157 °C;

Platinum resistance thermometer from 0 °C a 30 °C;

Fixed point cells;

Thermocouple calibrated at 4 fixed points;

Thermometry by Comparison

Thermocouples from 0 °C to 1100 °C

Digital/Analog thermometers from 0 °C to 1100 °C

Resistance thermometers from -100 °C a 450 °C

Termômetros de Liquido em Vidro calibrados por comparação contra TRP de -100 °C a 450 °C

Liquid in glass thermometers from -100 °C  a 450 °C

Calibrator/Simulator/Indicator

The Thermometry Laboratory is responsible for the dissemination of the International Temperature Scale of 1990 (ITS-90) in Brazil for contact thermometers, in the temperature range from -190 °C to 1084 °C. The laboratory performs primary calibrations of standard platinum resistance thermometer (SPRT) and fixed point cells from -190 °C to 962 °C.

Calibration of SPRTs by fixed points

The laboratories of Diter also take every opportunity to participate in international comparisons and key comparisons recognized by the Bureau International des Poids et Mesures (BIPM), which support the inclusion of their Calibration and Measurement Capabilities (CMC) in the Key Comparison DataBase (KCDB ) of the BIPM.

Research activities:

- Project and construction of fixed point cells;
- Project and construction of pure-metal thermocouples (Au-Pt e Pt-Pd);
- Development of metal-carbon eutectic cells for contact thermometry;

Traceability:

Reference Equipment

Calibration Services

Fixed point cells and bridges, furnaces of 1 and of 3 zones, Heat  Pipe furnace

SPRT by fixed points, Fixed Point Cells

Fixed point cells and multimeters, furnaces of 1 and of 3  zones,  Heat Pipe furnace

Thermocouple by fixed points

SPRTs, pure and noble metal thermocouples, furnaces, baths,  multimeters, digital  thermometer

Thermocouple and Digital/Analog thermometers by  comparison

Reference Fixed Point

Temperatura

Triple point of Argon

-189,3442 ºC

 Triple point of Mercury

-38,8344 ºC

 Triple point of Water

0,01 °C

 Melting point of Gallium

29,7646 °C

 Freezing point of Indium

156,5985 °C

 Freezing point of Tin

231,928 °C

 Freezing point of Zinc

419,527 °C

Freezing point of Aluminum

660,323 °C

 Freezing point of Silver

961,78 °C

 Freezing point of Copper

1084,62 °C

Contact:

Address: Av. Nossa Senhora das Graças, 50 – Xerém.
Duque de Caxias – RJ – Zip Code: 25.250-020.
Phone: (021)2141-3113 – FAX: (021)2679-9027.
E-mail: later@inmetro.gov.br