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The use of instrumentation on agricultural equipment slowly evolved from human observation of the operation of the equipment to a level of instrumentation which parallels that found on automobiles, and shared that automotive plateau for approximately 40 years. It has now embarked on a path which differs from that of the automobile. These differences are now openly competitive within the agricultural industry in both the choice of display technology and in function selection. This paper reviews both the early and modern agricultural instrumentation along with some of the unique functions now being monitored.

The use of electronic instruments on International Harvester agricultural equipment to monitor critical machine performance is a reality today. The first section of the paper provides a synopsis of the instrumentation systems currently available. The second section describes some of the display and transducer requirements needed for the future. The last section describes some of the unique environmental requirements for on-board agricultural equipment instrumentation systems.