With more than 6,000 units installed in challenging applications throughout the industry, Searchline Excel is the world's best-selling open-path infrared gas detector. From the Arctic Circle to the deserts of the Middle East, customers have time and again chosen Searchline Excel as their preferred choice. Searchline Excel's fundamental design has remained the same since its initial launch and continues to lead the way. Searchline Excel is completely immune to interference from sunlight or any other source of radiation such as flare stacks, arc welding, or lightning. The patented optical design used in Searchline Excel has proven itself to be the only solution available that completely overcomes all open path gas detection challenges. Unlike some competitive devices, it does not attempt to hide fundamental design inefficiencies by using software masks that can compromise the device's ability to detect gas. It compensates for all types of fog and/or rain, thereby allowing it to continue working accurately and reliably in all weather conditions.