Detachable, clear 3/16"-thick polycarbonate front shield provides protection at maximum rated temperature and pressure. Easily read the graduated direct-reading scale. The interchangeable transparent scale plates mount directly on the front of the flowtube. Unique float stops allow easy cleaning-remove and replace the float without disturbing either the flowtube or the shield. Tube sizes 3, 4, and 5 are fluted; tube sizes 6, 8, and 9 are tapered with a stainless steel guide rod.