intelligentlaser
https://www.intelligent-laser.com/products/il-hsp150-seam-tracking-seam-finding-sensor/
With the viewing distance range of 109mm~279mm, optimum viewing distance of 162 mm, and the capability of detecting joint gap as small as 0.5mm, the IL-HSP150 Laser Vision Welding Seam Tracking & Finding Sensor is designed to operate on any joint preparation ranging from sheet metal (≥1mm) to heavy plate complex grooves , performing better in interference reduction.