Trans-Cal Industries (TCI) has designed a low cost altitude reporting system that will meet and satisfy all the requirements of TSO-C88. The system is completely independent of the pilots altimeter and consists of a temperature compensated pressure sensitive dual aneroid capsule, associated mechanical linkages and an encoder module. The encoder module is an optical type utilizing Gallium Arsenide (GaAs) light emitting diodes, a code disc, solid state detector and associated electronics.
