Click to enlarge  

 Click to enlarge  

 Click to enlarge  

 Click to enlarge  

Drilling Resistance Measuring Method
Visual Record of Decay

The Measuring Method
The resistance measuring is based on the energy used to forward the needle through the wood and so depends upon the density of the wood: A drilling needle with a diameter of 1.5 mm to 3.0 mm (1/16 and 1/18 inch) penetrates into the wooden structure at a constant speed, and the drilling resistance is measured.

The data is recorded on a waterproof wax paper strip at a scale
of 1:1 or instantly saved by the Bluetooth Electronic Unit. 
However, the injury to the wood is minimal as the hole that is left
by 1.5 mm to 3.0 mm diameter drill bit is very small. The sawdust remains in the bore hole which closes the drilling channel.

With little effort one can get significant information about the material properties, the structure, possible damages and the thickness of the residual wall on trees and timber structures.

Researches and scientists, as well as industry professionals recognize the use of our instruments and utility of data generated from our products in these industries.

Resistograph Advantages
The advantages of the Resistograph are quite obvious:
The wood will only be insignificantly injured, and the drilling hole closes itself, due to a special drilling angle that was customized for the drill bit. A special computer program (see IML Software F-Tools/ F-Tools Pro) is available for all instruments.
If the Resistograph is equipped with the Bluetooth Electronic Unit the user might download all the information gathered during the day into the above mentioned computer program. Graph profiles can then be analyzed.

The Drilling Needle  (Drill Bit)
Because of the sawdust remaining in the bore hole and re-closing it fully, the wood (tree) suffers very little wounding while drilling (diameter of the needle: 1,5 mm / needle tip: 3,0 mm) (diameter of the needle: 1/16 inch / needle tip : 1/8 inch).

  IML Resistograph F-Series