Pantron Instruments introduced the light sensor ILD-1000 for detection of intensive, non-uniform light that typically arises from arc welding and laser welding. The device detects the existence as well as the non-existence of an arc and is made for error detection for automatic manufacturing processes. The system consists of the ILD-1000 evaluation device and the IR-M12VA sensor. The system was developed and tested in collaboration with a global supplier of robotic systems and welding plants. It is already successfully established by important automotive suppliers, rolling bearing and plant manufacturers.