INTRODUCING THE PROTÉGÉ ZM SINGLE GAS MONITOR FROM SCOTT SAFETY. The new Protégé ZM Single Gas Monitor is an easy-to-use, zero-maintenance gas detection solution that delivers high performance in a small, ergonomically designed package. It is available in oxygen, carbon monoxide and hydrogen sulfi de single gas models. With the Protégé ZM Single Gas Monitor, industrial workers and fi rst responders can focus on the task at hand—not on their equipment.