I don't need Bluetooth thankfully, hard wired is fine. I figured that the laser would be on a sled and travel the distance of the work bed/ piece. having it at a fixed distance it would actually measure the distance from the sensor TO the material .. the closer the edge of the material to the sensor, the higher the circumference at that point , and reverse for lowest circumference point. What I need to know is which type of laser will read fast enough to take those readings and if the arduino is capable of reading those distances and extracting the highest and lowest numbers generated. and if so what my max speed could be to make those measurements . I can raise or lower the RPM of the work piece and or the speed of the laser mount travel to accommodate the arduino or the laser if needed.