A knitted screen cloth fabric including a polymer coated, fiber-reinforced, flexible, foil-like web and method for making same are disclosed, the web including a lattice material of filaments and a polyester binding thread. To this end, such a particle counter includes a pressure regulating device acting on the fluid stream forces a predefined pressure difference which is independent of the flow properties of the main fluid stream onto the area situated between the inlet and outlet of the measurement channel. A first connector is arranged in a position on the third side plate adjacent to the first compartment area and a second connector, which is connected to the distributor, is arranged in a position on the fourth side plate adjacent to the first compartment area. In a preferred embodiment the I-ID is sized to engage a shoulder diameter of the gas diffuser showerhead device.