The principle of this LED module is that there is a pressure detection inside the unit that can sense the pressure difference according to the condition during smooth operation of the blockage and to transfer pressure into electricity. It can enhance the degree of discrimination and can identify the filter condition by LED color distinction, so that the user can conduct washing or replacement. Also, It can convert into analog signals through control board and connect with the I/O of the CNC controller to enable program editing. If there is a blockage in the filter, a message will be shown on the screen for dramatically increasing working efficiency. This LED module can be used in a wide range of industrial applications.