The Optris Bottom-Up Glass Inspection System (GIS) revolutionizes temperature measurement in Low-E glass production. Traditional infrared devices struggle to measure the coated, low-emissivity surface as glass exits furnaces. GIS overcomes this by positioning PI 450i G7 infrared cameras beneath tempering lines to monitor the uncoated, high-emissivity side. Operating at 7.9 µm and 150–1500 °C, these compact cameras withstand ambient temperatures up to 70 °C without additional cooling. The system’s line-scanning mode ensures precise, continuous monitoring, while the ultra-fast CTlaser 4M pyrometer and Digitally Controlled Lens Protection (DCLP) safeguard against glass breakage. This innovative approach ensures accurate, reliable temperature control, improving quality and efficiency in Low-E glass production.

Low-emissivity (Low-E) glass, widely used in energy-efficient windows and façade components, presents unique challenges for traditional infrared (IR) temperature measurement systems. Designed with a special coating to minimize heat transfer, Low-E glass significantly reduces emissivity on one side. This characteristic complicates temperature measurements during production, particularly as glass exits furnaces. Standard IR devices struggle to provide accurate readings through the coated side, leading to inefficiencies and potential quality issues in the manufacturing process.

The Bottom-Up Glass Inspection System (GIS) from Optris offers an innovative solution to overcome these limitations. By strategically placing multiple infrared imagers, such as the Optris PI 450i G7, beneath the tempering line, the system measures the temperature of the glass’s high-emissivity, uncoated side. This novel approach guarantees accurate readings regardless of the emissivity challenges posed by coatings.

The compact and uncooled design of the PI 450i G7 cameras makes them ideal for tight installations beneath production lines. Previously, such installations were impractical with traditional line scanners, which are large, cumbersome, and installed above the glass. With Optris’s advanced technology, manufacturers can now achieve consistent and reliable temperature measurements crucial for ensuring product quality.

The PI 450i G7 infrared camera is a cutting-edge solution tailored specifically for the glass industry. Its design. Operating at a spectral range of 7.9 μm, the PI 450i G7 is perfectly suited for measuring glass temperatures. This spectral range minimizes interference from the material’s intrinsic properties and ensures precision. The camera supports temperature measurements from 150 °C to 1500 °C, making it versatile across various glass production processes, from tempering and refining to secondary processing. With a resolution of 382 x 288 pixels and a thermal sensitivity of up to 150 mK at 650 °C, the PI 450i G7 delivers detailed thermal imaging. This capability allows for precise mapping of temperature distributions across glass panes, ensuring consistent quality. he camera is designed to withstand ambient temperatures of up to 70 °C without requiring additional cooling systems, enhancing its suitability for the high-temperature environments typical in glass manufacturing. Measuring just 46 x 56 x 68-77 mm, the PI 450i G7 is compact and lightweight, with an IP67-rated enclosure for durability. These features make it easy to integrate into existing production setups. Operating at a frame rate of up to 80 Hz, the camera captures real-time temperature data essential for dynamic production lines.

The GIS system’s effectiveness is amplified by integrating additional components. The license-free PIX Connect software transforms the camera into a versatile tool capable of functioning as a line scanner. This feature offers flexibility in system setup, enabling detailed thermal analysis and temperature control across the glass production process. For seamless integration into manufacturing workflows, the camera supports multiple analog and digital inputs and outputs, as well as relay functions. The industrial interface ensures compatibility with existing control systems. In the event of glass breakage, this safeguard minimizes potential damage to the camera, ensuring reliable operation with reduced downtime.

The Bottom-Up GIS with the PI 450i G7 delivers several advantages. By focusing on the uncoated side of the glass, the system provides consistent temperature readings, regardless of the coating applied, ensuring uniform quality. Accurate temperature data enables better control of furnace and cooling processes, minimizing waste and enhancing production efficiency. Compact design and pre-assembled configurations simplify integration into existing tempering lines, minimizing installation time and disruptions. Unlike bulky and expensive line scanners, the PI 450i G7 is a more affordable and compact alternative, requiring less manual effort for setup and maintenance.

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