This compatible sensor connects directly to the bedside monitor. It works with the following patient monitors: Novametrix: 505, 510, 511, 515, 515A, 515B, 515C, 520, 520A, 7000, 7100, Oxypleth; Spacelabs: 90351-D/G, 90369, 9046, 90466, 90467, 90489, 90651-07/08, 90419-01, 90651A-07; Nico Cardiopulmonary. 9-foot cable.