Aerosonic Corporation (Aerosonic) is engaged in the manufacture and sale of aircraft instruments and sensors. The Company designs and manufactures both mechanical and digital altimeters, airspeed indicators, rate of climb indicators, microprocessor controlled air data test sets, and a range of other flight instrumentation. In addition, it designs and manufactures angle of attack stall warning systems; integrated multifunction probes, which are integrated air data sensors, and other aircraft sensors and monitoring systems. The Company produces a full line of mechanical and electro-mechanical cockpit instruments. These instruments operate independently of the aircraft electrical system, as they transfer flight data to the pilot using only air pressure from aircraft probes. Aerosonic produces a line of angle of attack (AoA) stall warning products, including a self-test AoA sensor. The Company also produces Integrated Multi-Function Probes (IMFP).