Aerosonic Corporation (Aerosonic) is principally engaged in one business segment, which is 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. In June 2013, TransDigm Group Inc completes cash tender offer and acquires control of Aerosonic Corporation.