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The measurement of temperature at critical locations in the production process is essential for the full understanding and efficient control of float glass manufacture.

The following illustrations represent some of the locations for these measurements and our recommendations for the best choice of instrument.

If your specific area of interest is not covered here, our engineers will be pleased to discuss your requirements with you.
If you would like more detailed product information please use the Literature Request page.

A Literature download on the Float Glass Industry is available
Last Modified (08/07/04) 393KB.
 
 
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Temperature measurement at the Regenerator Temperature measurement at the Port Arch Temperature measurement of the Tank Roof Temperature measurement of the Tank Outer Surface Temperature measurement at the Canal Temperature measurement of the Tin Bath Break Detector Temperature measurement at the Lehr, Lehr Exit and Washer Temperature measurement of the Tank Outer Surface
Top of page1 - Regenerator
Regenerator   Accurate and reliable temperature measurement is essential for this important and vulnerable area of the tank. Thermocouples, despite their lower initial cost, can rapidly deteriorate. Radiation thermometers provide a long-term, cost effective and more reliable measurement.

Recommended Systems:-
On-line infrared thermometer System 4 - M1
On-line infrared thermometer System 4 - M1 Fibroptic

2 - Port Arch
Port Arch   Measurement of the port arches, especially in cross-fired furnaces, can provide important information on basic firing conditions, giving early indication of an incorrect or unbalanced firing situation.

Recommended Systems:-
On-line infrared thermometer System 4 - M1
Portable infrared thermometer Cyclops 100

Top of page3 - Tank Roof
Tank Roof   Thermocouples have been used for many years for this critical measurement. However, at the high temperatures at which they operate, deterioration can be rapid and often undetectable due to contamination of the element and migration of elementary materials from one wire to the other. Land Fibroptic thermometers overcome these problems without the need for water cooling.

Recommended Systems:-
On-line infrared thermometer System 4 - M1
On-line infrared thermometer System 4 - M1 Fibroptic
Portable infrared thermometer Cyclops 100

4 - Tank Outer Surface
Tank Outer Surface   The condition and safety of the furnace refractories are vitally important, especially as the end of a campaign approaches. A Land thermal imager or a portable thermometer from the Cyclops range can be used to make routine checks on key areas of the tank to minimize the possibility of glass break-out or refractory failure.

Recommended Systems:-
Portable Thermal Imager
On-line Thermal Imager - FTI6
Portable infrared thermometer PockeTherm
Top of page5 - Canal
The choice of thermometer here is dependent on the construction and operation of the canal. Short wavelength
thermometers will measure the bulk temperature of the glass.

Recommended Systems:-
Model FG
On-line infrared thermometer System 4 - M1
On-line infrared thermometer System 4 - M1 Fibroptic

6 - Tin Bath
Tin Bath   A knowledge of the temperature profile is vital in this area for the production of consistently high quality glass. When glass is just a few millimetres thick, selected waveband thermometers operating in a narrow band around 5µm are used to accurately measure the surface temperature of the product.

Recommended Systems:-
System 4 - M5 non contact radiation thermometer
Float line thermometer - FLT5
Glass thermometer - JRG/A

Top of page7 - Break Detector
Break Detector   Measurement here is used to highlight any breakages of the glass. Acting as a simple 'presence detector', a thermometer placed at this point aids the complete automation of the process.

Recommended Systems:-
System 4 - M5 non contact radiation thermometer
Float line thermometer - FLT5

8 - Lehr, 9 - Lehr Exit, 10 - Washer
Lehr and 9 - Lehr Exit   As the rate of cooling in the lehr is so important, continuing to measure the temperature profile is equally important. For temperatures above 250°C, infrared linescanners or 5µm thermometers are recommended, but as temperatures fall below 250°C the long wavelength thermometers or special linescanner should be used, so extending the capability of measurement down to ambient levels.

Recommended Systems:-
Infrared linescanners - Landscan
Stand alone Infrared Thermometer - RT8A
Float line thermometer - FLT5
Glass thermometer - JRG/A

Float Glass Surveys
The JRG/A is a temperature survey probe for plate and float glass in hot surroundings. It can be used in the float bath to
provide spot temperatures to ensure uniformity of glass temperature gradients.

Recommended Systems:-
Temperature Survey Probe - JRG/A
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