Bark probe—an instrument for measuring bark thickness of eucalypts

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Abstract
The instrument consists of a modified solid brass cylinder through which moves a plunger tipped with a blunt needle. The needle is pushed through the bark to the wood surface and the depth of penetration is read from a scale on the barrel. The instrument enables fast and accurate measurements of bark thickness to be made on gum, peppermint and stringybark eucalypts. The measuring technique is virtually non-destructive and is simpler and more accurate and precise than other commonly used techniques, including the Swedish bark gauge.

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