The AERO 451-101 is a panel mount carbon monoxide detector designed for FAA certified Part 23 aircraft, and Part 27 and Part 29 rotorcraft. Compact and lightweight, this CO detector requires little panel space and provides highly accurate CO detection. This unit is perfect for builders and pilots who are looking for basic protection from the dangers carbon monoxide in their certified aircraft or helicopter.Installation is authorized for Part 23, 27, and 29 aircraft/rotorcraft under Non-Required Safety Enhancing Equipment (NORSEE) and requires a minor alteration logbook entry by an IA.