Nellcor Easy Cap II and Pedi Cap CO2 Detectors to verify proper endotracheal tube placement. These CO2 detectors assure you that your patient is intubated properly right from the start - and remains that way during transport.Attaches directly to the ET tube and responds quickly to exhaled CO2 with a simple color change from purple to yellow. Easy Cap II and Pedi Cap CO2 Detectors are an economical, yet invaluable airway management tool.