ArborElectro Impedance Tomograph

 For detecting size and location of active fungi attacked regions

 It works based on electric resistivity measurements

 Up to 32 sensors around the trunk

 Seasonal and daily changes can be visualised (view the presentation here)

 Resistivity increases/decreases if there is a change in the ionic concentration

 Fungi attacks even in very early stages may be determined

  1. Place the resistivity meter onto the tree.
  2. Measure the circumference and decide the proper shape (circular, elliptic or irregular). Place the electrodes onto the tree at the proper positions or measure their positions. Enter the data to the computer.
  3. Start the measurement on the computer. During the measurement do not touch the tree. Do not measure other conditions parallel to the resistivity measurement.
  4. Choose triangulation parameters and run the iterations. The program will calculate the resistivity map of the selected cross section.

  • GeoPic-32 Multielectrode Resistivity Meter
  • LEMO-USB connection cable (with 4 needles) to connect the Multielectrode Resistivity Meter to computer
  • LEMO-USB charger cable (with 3 needles) to charge the Multielectrode Resistivity Meter
  • 4 pcs. electrode connecting cable with 8 crocodile clips on each
  • Cable
  • 50 pcs. stainless steel needles (as electrodes) for measurements; diameter: 1.5 mm, length: 63 mm
  • Steel hammer
  • 5 pcs. screws to fix the Multielectrode Resistivity Meter onto the tree
  • Electrode remover tool
  • Case
Excitation voltage
5-50V, adjustable in 5V steps
Current measurement range
0-20mA; 0-400µA; 0-40µA
The length of one basic measurement
1, 5, 20, 100
Inbuilt divider
Power supply
Built in 5V/5000mAh Li-ion Power Bank
Continuous operation time*
Approximately 2 hours
Total weight**
6 kg
PC connection
LEMO-USB cable or Bluetooth
Total measurement time of one tree***
45 minutes
Operating temperature range
0-40 °C

*on average diameter trees
**without PC, including case, hammers
***one section, including assembly, geometry registration, measurement