Temperature monitoring with means of IR sensors of Micro-Epsilon is mainly used in manufacturing industry and applications regarding maintenance tasks. The application of these IR sensors is relevant for the retrofitting regarding already existing production lines as well as mechanical engineers. The product line regarding temperature monitoring offers IR cameras, temperature sensors for current measuring tasks as well as high temperature sensor suitable to keen ambient conditions. IR sensors of Micro-Epsilon measure the temperature of the molten mass in casting plants immediately before filling the moulds. The temperature values are used for monitoring the specified target temperatures.