Ensuring the quality and performance of double-glazing units (IGUs) is a critical responsibility for glass manufacturers. While aesthetic and structural aspects often take centre stage, the invisible yet essential role of gas levels within sealed units must not be underestimated. Measuring and maintaining proper gas fill rates is fundamental to delivering reliable and high-performance insulating glass units (IGUs) that meet both industry standards and customer expectations.
The critical role of gas in double glazing units
Inert gases like argon, krypton and xenon are essential to the thermal efficiency of IGUs. Their low thermal conductivity helps minimize heat transfer, significantly enhancing insulation and reducing energy costs for end-users. Studies have shown that:
Argon-filled IGUs improve thermal insulation by up to 20 percent compared to air-filled units.
Krypton, while more expensive, offers a further improvement in units with narrow spacers.These gases also reduce condensation risks, ensuring a clearer, more aesthetically pleasing unit for years.
The role of technology in quality control
Advanced tools such as Tunable Diode Laser Absorption Spectroscopy (TDLAS) are reshaping quality control for gas measurement. For example, the Sparklike Laser Portable is a non-invasive gas analyser capable of accurately measuring argon and krypton concentrations, even in triple-glazed units. Testing conducted by ift Rosenheim demonstrated that Sparklike Laser achieved measurement accuracy within ±2 percent when compared to gas chromatography.
Case Study: Ensuring Gas Fill in Production
Company Profile: Szkłoland LLC is a European manufacturer of building, decorative and furniture glass.
Challenge: They have not been able to verify if their gas press for insulated glass work properly.
Solution: They invested in non-invasive gas measurement device, Sparklike Laser Portable for end-of-line testing and implemented to the existing processes successfully.
Result
- Able to proof their IGUs are filled with gas and the exact gas fill rate.
- 100 percent sure their gas press in the insulated glass process line functions.
- Provide the market with better-quality products – Customer are more satisfied.