Low
Cost Accurate Heat Indicators
for Inaccessible Areas
Eliminating the need for costly equipment. Thermolabel products permanently
record maximum interior and exterior temperatures of products and appliances,
in stationary and mobile situations during processing, storage and shipment.
They are inexpensive, easy to use foolproof in operation and accurate
to +/- 1 % of the rated temperature.
A
Permanent, Visible Record
Thermolabels are formulated to react within a few seconds when the rated
temperature is reached. The various single and multi-temperature labels
have ratings falling within an overall temperature range of 90ºF to 500ºF
(32ºC to 260ºC). As each section of a label reaches its rated temperature,
that section responds with a sharply defined color change from white to
black leaving the printed temperature clearly visible. And, because this
is indelibly printed in both Fahrenheit and Celsius, it provides an irrefutable
record of maximum temperature attained in any area of observation, even
when this is otherwise inaccessible as in ovens, washing, curing and sterilizing
chambers, ships' holds and the insides of processed foods and biologicals.
Thermolabel products are, therefore, widely used for proof of heat attained
in screen printing, metal coatings, dish machines and textile processing
as well as for identification of maximum temperature attained during storage
and shipment.
For
Use Under All Conditions
Available in several forms for specific applications, there is a Thermolabel
product for use under all industrial conditions, protected against humidity,
steam, water, oil, grease, solvents and chemical contamination. Shelf
life is a minimum of two years when stored in a normal office environment.
Recorded temperatures are positive and permanent, making Thermolabel products
indispensable wherever thermal control is important. Each product comes
with a calibration sheet showing the temperature values obtained in our
laboratories. For example, a label marked 300ºF for identification purposes
may actually calibrate at 298ºF and will consistently give this value
under our test conditions. The widest variation one may expect from this
298ºF figure is + 1% although any given batch will show a much lower than
1% variation. The user should be aware that conditions of use markedly
different from our test conditions may produce different temperature readings
as is true with most thermometers. However, when used under identical
conditions reproducible results will be obtained. It is not recommended
that Thermolabels be subjected to prolonged heating near indicating temperatures.
Under these conditions a gradual darkening may be observed. In this case,
the Thermolabel should be replaced from time to time.
INDUSTRIAL
APPLICATIONS
Screen Printing
Textile Processing
Plastic Thermoforming
Plate Making-Graphic Arts
Heat Sealing Plastics
Circuit Board Manufacturing
Plastic Laminating
Prefinishing Metals
Auto Painting
Drying Printing Inks
Extrusion Insulation-Wire & Cable
Repair of Paintings and Art Objects
Iron-on Patches & Labels
Office Copiers
Shipping,
Storage, Shelf Temperatures
of Heat-Sensitive Products
Measure maximum temperatures of product in supply and distribution pipeline,
freight cars, warehouses, shipping platforms, retailer's shelf.
Photographic Film
Gelatin Capsules
Waxed Paper Products
Biologicals
Candy, Gum, Chocolates
Explosives
Dried Fruits
Yeast
Test Animals
Textile Yarns
Heat
Santizing-Sterilization
Dish Temperatures in dishwashers
Washing Animal Cages
Bacteriological Media
Surgical Instruments
Safety-Maintenance-Fire
Protection
Electrical Conductors Under Loading
Overheating of Motors, Generators, Transformers
Ceiling Temperatures for Sprinkler Installation
Woodwork Temperatures Near Heating Equipment
Overheating Bearings
TECHNICAL DATA
Accuracy: +/- 1% of calibrated temperature
Rate of Response:
THERMOPAPER — 1 seconds
THERMOLABELS — 5 seconds
Storage Stability:
2 years when stored in cool dry place (below 80ºF).
Effect of Liquids:
Materials such as solvents, greases, oil, water, etc. should not be allowed
to contaminate indicator which must be kept clean and dry. Moderate amounts
of vapor have no effect but actual wetting is to be avoided. If contamination
is likely, use a single temperature Thermolabel.
Time-Temperature Relationship:
If held a few degrees below indicating temperature, a very gradual graying
may occur over a period of months for the lower indicators and for progressively
shorter times for the higher ones ranging down to several hours for 500ºF
Such graying is readily distinguishable from the sharp color change occurring
at indicating temperature. For long term tests indicator strips can be
periodically changed.
Stability on Thermal Cycling:
No effect within the time limitations indicated above.
Copyright
© 1999 Paper Thermometer Company.
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