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The Acoustical Capacity Meter was primarily developed to measure the capacity of engine combustion chambers either on the head assembly itself (using the VM-240A) or on a complete engine via the spark-plug fitting (VM-230A).
These measurements allow the engineer to quickly determine that the compression ratio of each cylinder is correct in far less time than it would normally take, using the traditional oil-filling, burette method.
The Acoustical Capacity Meter enables the rapid and accurate measurement of irregular shapes without the use of liquids therefore has a broad range of potential additional applications.