¶ IML Resi
| Company | Forest Quality |
| Country | Australia |
| Website | https://www.forestquality.com/resistograph |
| Category | Planning & Inventory › Remote sensing & mapping |
nmeasuring and evaluating Woodquality using NIR or Resistograph etc..
¶ Overview
The IML Resi (Instrumenta Mechanik Labor Resistograph) is a precision drilling resistance measurement instrument used to assess the internal condition of standing trees, timber structures, and wooden poles without causing significant damage. The device works by driving a fine needle-like drill bit (typically 1.5–3 mm in diameter) into the wood at a constant feed rate while measuring the rotational resistance encountered by the bit as it penetrates. Variations in drilling resistance are recorded in real time and displayed as a resistance profile, revealing differences in wood density, the presence of decay, cavities, cracks, insect galleries, or resin pockets along the drill path. The resulting profile — sometimes called a resistogram — is analogous to a density log, allowing assessors to make informed decisions about tree or timber health without extracting a core sample. In forestry and arboriculture, the IML Resi is widely used for urban tree risk assessment, where it helps qualified arborists determine whether a structurally compromised tree poses a safety hazard, and for evaluating residual wood quality in harvested or standing timber. It is also employed in heritage timber assessment, utility pole inspection, and research contexts where non-destructive wood property measurement is required. In Australia, the tool is used by arborists, local councils, and state forestry agencies to assess mature trees in urban parks, roadsides, and native forest remnants, particularly where species such as eucalypts are prone to internal hollowing — a common characteristic that provides critical wildlife habitat but complicates structural assessment. Australian standards for tree risk assessment increasingly incorporate objective measurement tools like the IML Resi to supplement visual inspection, helping practitioners distinguish between ecologically valuable hollow-bearing trees and those presenting unacceptable risk to public safety. The instrument is lightweight, battery-operated, and field-portable, making it practical for use across varied terrain.
¶ Assessment
Useful for improving harvest planning and reducing quality-related losses, but its broader impact on risk reduction and large-scale operational outcomes is only partially supported.
¶ Details
| Field | Value |
|---|---|
| Company | Forest Quality |
| Country | Australia |
| Type | Company |
| FWPA RD&E | 4.5 |