Cardinal Detecto 439 400 lb. Eye-Level Mechanical Beam Physicians Scale with Height RodCardinal Detector 439 400 lb. eye level mechanical beam physicians scale. This scale weighs up to 400 lb. and displays the markings along both sides, allowing health professionals to read the weight whether standing in front of or behind the scale. Simply welcome the patient to step onto the 14 1 2" x 10 1 2" platform, and slide the counterweight to the side until the beam is level. This model comes standard with a height rod that measures from 30" to