Quality Control Services

2340 SE 11th Ave Portland, OR 97214
Thermometer calibration

Quality Control Services State-of-the-art Thermometry Laboratory is accredited by the American Association of Laboratory Accreditation (A2LA) under Certificate 1550.01

Your thermometers (Liquid, digital, and IR) are calibrated using direct comparison by industry standard test methods. We have Ertco/Hart/Fluke baths that cover the range of -80 to 150°C. We also have a Fluke drywell we use from 151 to 400°C, and a Furnace capable of temperatures from 400 to 1000°C. Please refer to our scope of accreditation for our capabilities and uncertainties.

Temperature calibration is based on the International Temperature Scale of 1990 (ITS-90).

Accredited Certificates/ NIST certified.

All certificates are traceable to the SI via NIST using methods NIST SP 250-23 for liquid thermometers, and ASTM E77 for liquid, and digital-thermocouples, RTD’s and Thermistors. They also meet all criteria for ISO-17025:2017, and Z540-1-1994.


Thermometers are typically tested at 3 points using ASTM E1 recommended test points or to customer requested test points if requested. Tolerances are from ASTM E77, NIST SP 230-23, or manufacturer’s provided tolerances.


Measurement uncertainties are calculated using methods consistent with the Guide to the Expression of Uncertainty in Measurement (GUM) with a k factor of 2 for an approximate 95% level of confidence.

Sales of thermometry:

Please contact us at 1-800-843-1237 x 305 for information pertaining to thermometers for sale or email lab@qc-services.com to request availability and pricing.

Quality Control Services

A2LA thermometry calibration accredited

Thermometry Form:


QCS calibrates both Spirt & Hg, but you may want to read this:

For many people, the words "thermometer" and "mercury" are practically synonymous. That association is unfortunate: Mercury is a potent neurotoxin, and every thermometer that contains it is a potential environmental threat. In the 21st century, however, that is a risk that no one needs to take, and a worldwide effort is underway to deploy substitute devices in consumer, professional, and industrial applications.

NIST: Nov 2017

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