Thermco Thermometer Calibration

• Why Recalibrate ?
• How Often Should A Thermometer Be Recertified ?
• What does the Recertification Program Consists of ?
• How to Order Thermometer Recertification

Why Recalibrate ?

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 temperature measurements.

How Often 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 division.
• A calibration report is generated detailing the pertinent information including the correction factors for each
  test point.
• All calibration information is entered into the THERMCO data storage system.
• All certification procedures are performed in accordance with NIST and ASTM guidelines, which meet with
  requirements set by regulatory agencies.

How to Order Thermometer Recertification...

Send carefully packaged thermometer, along with the completed Thermco Recertification Form 
and a copy of the current calibration certificate to:

Thermco Products, Inc.
10 Millpond Drive - Unit 10
Lafayette, NJ 07848
Attn: Recertification Dep.