Abstract：According to the problems, such as, low accuracy, big error and etc. that exist in the coal material level measuring device of Shanxi LvLiang Mugua coal mine, SITRANS LR 460 radar material level meter was applied to the automatic monitoring system, using S7-300 series PLC and configuration software as the core control system. Through WinCC configuration management software, the material bits of data can be visually displayed in real time, so as to implement the function for the automatic detection of bunkering level, overrunning alarm and so on. It shows that in high dust under the bad environment, SITRANS LR 460 has higher accuracy and stability.

Keyword：radar material level meter;PLC;WinCC;in real time;