ERTCO has been a manufacturer of precision glass thermometers since 1942. Our calibration personnel have served an average of 15 years in our facility and are well-versed in the calibration procedures used at the National Institute of Standards and Technology ( NIST ) as well as being involved in extensive continuing education programs. ERTCO's state-of-the-art metrology laboratory is capable of calibrating enclosed scale, solid-stem, mercury and organic filled glass thermometers with ranges from -200 to +400 degrees Centigrade (-328 to 750 degrees Fahrenheit). This metrology lab is equipped with complete sets of liquid-in-glass primary standards calibrated at NIST, and primary standard sets with DKD calibration accredited by the German counterpart of NIST, the
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