Glass Industry Sensors

Pyrosales have been producing temperature solutions for the Glass Industry for more than 20 years. Our products are constantly being updated to meet the challenging and ever-changing production techniques of glass manufacture. We specialise in custom designed and engineered solutions.

Tri-Level Thermocouples
The viscosity of glass in a container forehearth has a major effect on the flow rates and gob weight. Installation of thermocouples across the forehearth allows for accurate monitoring and control of the glass temperature. As the viscosity is temperature dependent, it results in an homogenous glass flow.  For the glassmaker, there are a number of benefits to this accurate control:

• Optimum weight of each container
• Reduction in tank wear, which increases the tank life
• Overall cost savings by higher yield of containers per batch

Molten glass is a very harsh environment and any thermocouple immersed in it must be able to withstand the severe conditions. The Tri-level assembly is protected from the aggressive nature of the glass by an outer sheath of ODS® Platinum or a Platinum/Rhodium alloy and has three measuring points spaced to give readings of top, middle and bottom temperatures. This allows for accurate control of heating and cooling to give a homogeneous glass flow.

Tri-levels are arranged along and across the forehearth to suit the complexity of the control system. Each Tri-level is designed to suit the individual forehearth. Careful attention is paid to optimising the life expectancy with the overall cost of each assembly.  Tri-levels are available with the following calibrations:-

• Type 'R' ( Pt/Pt 13%Rh)
• Type 'S' (Pt/Pt10%Rh)
• Type 'B' (Pt6%Rh/Pt30%Rh)

Pyrosales uses Fibro^® Platinum in both Type 'R' & 'S' Tri-levels to improve element strength & increase overall assembly life.