This Aeronautical Standard covers two (2) basic types of instruments as follows: TYPE I - Range 35@000 feet. Barometric Pressure. Scale range at least 28.1 - 30.99 inches of mercury (946-1049 millibars). May include markers working in conjunction with the Barometric Pressure Scale to indicate pressure altitude. TYPE II - Range 50@000 feet. Barometric Pressure. Scale range at least 28.1 - 30.99 inches of mercury (946-1049 millibars). May include markers working in conjunction with the Barometric Pressure Scale to indicate pressure altitude.
SAE AS392C-1993 history
1970SAE AS392C-2008 Altimeter, Pressure Actuated Sensitive Type
1993SAE AS392C-1993 ALTIMETER@ PRESSURE ACTUATED SENSITIVE TYPE
1959SAE AS392C-1959 Altimeter@ Pressure Actuated Sensitive Type (Use SAE AS 8009)
1951SAE AS392B-1951 ALTIMETER@ PRESSURE ACTUATED SENSITIVE TYPE
1949SAE AS392A-1949 ALTIMETER@ PRESSURE ACTUATED SENSITIVE TYPE
1947SAE AS392-1947 ALTIMETER, PRESSURE ACTUATED SENSITIVE TYPE