Transcat'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.
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
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.