Thermco Thermometer Calibration
Liquid in Glass - Thermister -
Thermocouple - Bimetal - RTD -
leading manufacture of temperature measurement
and calibration instruments, and an ISO
accredited provider of calibration and
Thermco is uniquely qualified to offer you a
comprehensive package of accurate instruments
plus expert metrology services. Our Thermometer
Calibration and Recertification Service
standards are directly traceable to the
National Institute of Standards and Technology
(NIST), and our calibration service and test
procedures meet the highest standards of
government and industry. Thermometer/Hydrometer
Calibration Report includes list of actual
corrections to a tenth of a degree; accuracy
for temperature or density correlated to NIST
Standards; statement of traceability to NIST
Thermco Recertification Form Temperature Record
Certificate of Accreditation
Why Recalibrate ?
• How Often Should A Thermometer Be
• What does the Recertification Program
Consists of ?
• How to Order Thermometer
Liquid-In-Glass Thermometers are
extremely accurate, stable, economical and easy to use
temperature indicating devices. Since their introduction 400
years ago, few engineering changes have altered their function.
Unlike their electronic or bi-metallic counterparts,
Liquid-In-Glass thermometers have no moving parts, need no
outside power sources and require almost no maintenance. They
rely solely on the unalterable physical properties of the
liquid and glass materials of the thermometer. When the
instrument is heated, the liquid expands and rises up the
capillary tube. When it is cooled, the liquid contracts and
travels down the capillary. Along with the expansion and
contraction of the liquid column, the thermometer bulb itself
will expand and contract slightly. After repeated uses, even
the highest quality Liquid-In-Glass thermometer may undergo a
slight change in bulb volume due to this expansion and
contraction. If a change of this type does take place, the
indication of the instrument will also change. Recalibration
allows the user of the Liquid-In-Glass Standard to maintain
accurate, reliable and consistent results when making
Should A Thermometer Be Recertified ?
Many factors determine recertification of
thermometers, such as usage, temperatures measured,
in-house procedures, and regulatory agencies' guidelines
and policies. As a general guideline for good laboratory
and manufacturing practices, thermometers should be
recertified/verified on an annual basis
What does the
Recertification Program Consists of ?
• Complete visual inspection for any
physical damage If possible the damage will be repaired.
• Thermometer readings are compared against NIST standards in
high precision calibration baths using the
comparison method at determined test temperatures.
• Each temperature is recorded to 1/10th of a scale
• A calibration report is generated detailing the pertinent
information including the correction factors for each
• All calibration information is entered into the THERMCO data
• All certification procedures are performed in accordance with
NIST and ASTM guidelines, which meet with
requirements set by regulatory agencies.
How to Order
Send carefully packaged thermometer,
along with the completed Thermco
and a copy of the current calibration certificate
Thermco Products, Inc.
10 Millpond Drive - Unit