The Thermodynamic Metrology Group provides calibration, certification, and test services for thermometric artifacts over the range from 0.65 K to 2,100 °C and humidity artifacts over the range from –100 °C to 85 °C. Additionally, special services are available for prototype artifacts, non-standard artifacts and proficiency tests.
Specific information regarding each service is accessed through the links given below:
Thermometry Calibrations
♦ Industrial thermometers
– resistance or thermocouple probes
– digital readouts with probes
♦ Liquid-in-glass thermometers
– mercury -- DISCONTINUED 1-Mar-2011
– organic
♦ Thermocouples
– base metal
– noble metal
– pure metal
♦ ITS-90 defining artifacts (Ar TP to Ag FP)
– standard platinum resistance thermometers
– fixed-point cell
♦ Cryogenic resistance thermometers (0.65 K to 165 K)
– capsule standard platinum resistance thermometers
– rhodium-iron
– germanium
– platinum cobalt
– zirconium nitride, ruthenia
♦ Special tests for thermometry
– prototype equipment
– bridge certification
– proficiency testing
Humidity Calibrations
♦ Hygrometers
– chilled mirror
– electric
– electrolytic
– optical spectrographic
– infrared
– aspirated
– pneumatic bridge
– RH probes
Pressure and Vacuum Calibrations
♦ Vacuum gauges
– spinning rotor gauges
– ionization gauges
♦ Piston gauges and pressure transducers
How to Arrange a Calibration
- Contact the staff member in charge of the calibration service for your artifact with any technical or calibration cost questions.
- Most calibrations are performed on a first come first serve basis. Some calibrations are performed in batches. Contact staff member for scheduling.
- If you are sending an SPRT for calibration, please measure the triple point of water resistance R(TPW) before shipping.
- Ship your artifact with a copy of the purchase order. Use a sturdy box in which we can return the calibrated instrument.
- The purchase order my be sent to contact by e-mail, fax, or mail. Please include the following information:
• Service ID for calibration
• Model and serial number of your artifact
• Customer contact name, address, phone, and email
• Return shipping method (e.g., shipping account number)
• R(TPW) value (if applicable, see #3 above)
General information regarding calibrations at may be found on the webpage, NIST Calibration Services.