The SAE 5-35 from SANDIA Aerospace provides accurate altitude data by combining altitude encoding, digital altitude on two RS-232 outputs, and altitude inflight monitoring (AIM) into a single compact and reliable package. It performs the functions of an Altitude Encoder by providing Gillham Grey code to the aircraft’s mode C transponder while innovative pressure circuitry virtually eliminates the warm up time. This unit provides two RS232 altitude data outputs in 10 foot increments for use by GPS and Terrain Awareness Systems (TAWS). Each RS232 output is totally independent so that a load on one output will not affect the other. The Altitude data ranges from -1,000 to 35,000 feet—ideal for installation on piston, turbine or jet aircraft. Altitude inflite monitoring (AIM) monitors the selected altitude and informs pilots when the aircraft deviates more than 100 feet.