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Accredited Reference Temperature Calibration Services

Accredited Primary Temperature Calibration Services from Transcat

request a transcat calibration service quick quoteTranscat’s Reference/Primary Temperature Laboratories are located in our Dayton, Ohio, calibration lab and the Philadelphia, PA, calibration lab. These two facilities are capable of realizing the ITS-90 scale (International Temperature Scale of 1990) by utilizing the defining instrumentation of Standard Platinum Resistance Thermometers (SPRT’s), ITS-90 Fixed Point Cells, extremely stable and uniform Temperature Baths, and a precision Thermometry Resistance Bridge. In doing so, we are able to deliver a wide range of reference thermometry calibrations, all of which provide traceability to SI units through NIST in three distinct categories: Thermometer Readout-only, Probe-only, and System Calibrations.

Philadelphia Primary Temperature Lab Dayton Primary Temperature Lab
Philadelphia Primary Temperature Lab   Dayton Primary Temperature Lab




PRT Calibration

Philadelphia Primary Temperature Lab

Precision Thermometer Readout

Thermometer Readout-Only devices measure electrical outputs/resistances and covert them to temperature. Calibrations are traceable through the use of Standard Decade Resistors characterized by a Fluke 1595A or Fluke 1590 DC Resistance Bridge and an Agilent / Keysight 3458A 8.5 Digit Multimeter, covering a range of 0 to 1 gigaohm with a best case uncertainty of 0.036 milliohm

PRT, SPRT and System Calibrations

Transcat also offers Probe-only and System Calibrations (w/ probe and readout together) for reference grade PRT’s (Platinum Resistance Thermometers), Precision Thermistors, and SPRT’s (Standard Platinum Resistance Thermometers).  All calibrations are traceable through extremely stable and uniform Temperature Baths/Blocks, the Triple Point of Water, Mini Fixed Point Cells, including Indium (156.5985 °C), Tin (231.928 °C), Zinc (419.527 °C), aluminum (660.323 °C), SPRT’s and a DC Resistance Bridge, which offers a temperature range of -196°C to 660.323°C and a best-case uncertainty of 0.6 millikelvin in our Dayton lab and 0.5 millikelvin in the Philadelphia lab.

Upon realization of the ITS-90 scale, as outlined by NIST Technical Note 1265 (Guidelines for Realizing the International Temperature Scale of 1990), and by utilizing the above techniques, the customer is provided with ITS-90 Coefficients pertaining to the temperature range calibrated.  Temperature vs. resistance tables will be provided, depending on the level of service requested and/or provided.


Hart 5615-X Series Secondary Industrial Probe Hart 5626/5628 Series SPRT
Hart 5610-X Thermistor Probe Kaye Instruments IRTD
Ametek STS Series PRT Thermoprobe Tl1-A Thermometer
Fluke 1551/1552ex Stik Thermometer Hart 5627a-X Series Secondary Industrial Probe
Hart 1521/1522 Handheld Thermometer Hart 1523/1524 Handheld Thermometer
Hart 1502A Tweener Readout Hart 1529-X Chub E-4 Readout
Ametek DTI Series Handheld Thermometer  
Metrology Wells/Dry Blocks
Hart 914x Series Metrology Well Keithley 2182 NanoVolt Meter
Ametek RTC/ATC Series Dry Block Kaye K140 Ice Point Reference

Learn More about Accredited Reference Temperature Calibration from Transcat

Contact Transcat today for more information about our accredited reference temperature calibration services and labs by calling 800-828-1470, filling out our Request a Quote Form, or through our Live Chat system, which is located on the right-hand side of this page.