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Resistograph®

The resistance drill for detecting decay in wood

Timber Testing

Timber structures include log cabins, bridges, wood culverts, play structures, totem poles and large timber framed buildings. Engineers, safety inspectors, and building restoration specialists require accurate data to know the internal condition of these structures. The Resistograph® excels at providing this information. Its ease of use, the speed of data collection, the ability to hold it with one hand in awkward locations, and the ability to read the data easily as it appears, makes the R650 series the machine of choice for discerning users.

Seen here, testing wood culverts, timber framed buildings, and totem poles.

Resistograph wood pipe testing

Puntledge – 12 foot diameter wood stave culvert. The water intake pipe for a generating plant.

Rinntech Resistograph In Timber Structures

Testing large timber beams in a former locomotive repair shed.

Rinntech Resistograph Graphs

Timber testing – Douglas-fir posts and beams. Resistograph® R 650-EA

Power Pole Rinntech Resistograph R650-PR

Testing logger’s sport climbing pole.

Testing a Redcedar totem pole

Utility Pole Testing

Utility Pole Testing

Pole Testing Guidelines
  • Resistograph®
    • Timber Testing
    • Decay in Trees
    • Timber Cruising
  • Arbotom®
  • ArboRadix™
  • DynaTim™
  • LignoStation™
  • LignoVision™
  • LinTab™
  • ArboStApp™
  • TSAP-Win™
  • ArboRefT™
  • ArWiLo™
  • ArboMech™
  • TurboCalc™
  • CoreJector™ & Wood Borer

For current pricing and to learn more,  contact
Dr. Julian Dunster North American distributor for Rinntech Inc.
Tel: 778 977 1395 (C) or 778 433-8465 (O)
(Pacific Standard Time Zone)
Email: jd@dunster.ca

This website is owned and operated by Dunster & Associates Environmental Consultants Ltd. as a North American distributor for Rinntech Inc.

Dunster & Associates Environmental Consultants Ltd.

We provide sales and support services for Rinntech products.

Call 778-433-8465 or 778-977-1395
(Pacific Standard Time Zone)
Email jd@dunster.ca (Julian Dunster)

Request more info

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The Word Resistograph

The U.S. Trademark Trial and Appeal Board (TTAB), in late October 2019, dismissed the petition of IML Instrument Mechanic Labor, Inc. for cancellation of the RESISTOGRAPH® trademark in the USA “with prejudice”. This means that the RESISTOGRAPH® trademark continues to be an exclusive trademark belonging to Frank Rinn, the inventor of the term (“RESISTOGRAPH”) for his inventive high resolution resistance drilling devices. Frank Rinn has been developing these high quality machines in Germany since 1986 and his RESISTOGRAPH® trademark is registered in approximately 40 countries. Only machines made by Rinntech are the original Resistograph® devices and entitled to use the Resistograph® trademark. Only data collected with a machine made by Rinntech provide Resistograph® data.