Five stars manufactures by-pass rotameter assembly set for measuring flow of gases and liquid through pipes of large diameter. The unit consists of orifice plate [ss] sandwiched in two mild steel or pvc flanges with a bypass rotameter. A glass tube or an acrylic body rotameter is provided which is calibrated in terms of the actual flow in the pipeline. The company offers the assembly for any desired line size up to 14" and any required range.