Thermometer Calibration Services

When a thermometer is heated, the liquid within the bulb expands and is forced upward into the capillary where its level indicates the temperature value. Each heating and cooling cycle imparts stress to the bulb. After repeated use, even the highest quality liquid in glass thermometer will experience a slight change in bulb volume due to this expansion and contraction. When this change takes place, the indication of the thermometer will also change. Recalibration of the certified thermometer updates the indications and thus allows the user to maintain accurate, reliable and consistent results when making temperature measurements.

When your instrument is calibrated, it is compared to NIST certified primary master standards at the test points specified by the customer or ICL, in accordance to ASTM and NIST test methods.

A new NIST Traceable certificate of calibration will be issued, valid for the period of time that you specify. This certificate meets the requirements of ISO/IEC Guide 25, ISO/IEC 17025, the FDA, the EPA, and the ISO 9000 & QS 9000 series of quality standards. Sample Calibration Report.

Recalibration at regular intervals to document traceability to NIST is an important part of most quality programs such as the ISO 9000 series of quality standards.

This is a complex question. Consideration should be given to the frequency of use, the temperatures at which it is used, and the requirements of the regulatory agencies and/or the quality system you may be using. In general, for most laboratory and industrial applications a recalibration interval of one year is considered reasonable and prudent, however you should choose a recalibration interval which satisfies your quality system and then be sure to adhere to it. Most ISO 9000 series programs are using a one year recalibration interval. More info

Simply fill out a recalibration form and send it to us with your thermometers.

If you do not have facilities to safely package your glass thermometers, we will loan you a case for shipping (no charge). Fax or email us the recalibration form, (be sure to check the ‘Please send me a shipping case!’ option), and indicate the length of each thermometer. We will send you via UPS a reusable shipping case into which you place the instruments (we’ll include instructions), snap the case closed, affix the supplied return label, and ship it back to us via the carrier of your choice. Your instruments will be returned to you, with calibration reports, in standard packaging.

Normally 5 to 7 working days at our facility. If you have an emergency, let us know and we will make certain your deadline is met.

We also offer a wide variety of NEW NIST Traceable calibrated thermometers, ASTM, SAMA and others, available for immediate shipment at competitive prices.