Originally Posted By: Oliver Hein This post was automatically imported from our archived forum.
Thank you for your interest. The Resistograph uses a small drill bit (less than 1/8 inch in diameter) to drill the wood fibers to get an accurate reading (scale 1:1) of any wood timber. The density is measured during the drilling process so if there is a void or any decay pattern the graph profile would decrease at this point. When new resistance is picked up the graph profile would increase again and you would have a perfect picture of the inside of that timber structure. The instrument does work in the cold. We have used it in extreme cold conditions in MN with -20 Fahrenheit. Average cost for Resistograph: $3,900. Here are some of the links that are helpful to cruise our website. Please call me toll free at 888-514-8851 if you have any further questions.