Radius dendrometer (DR)

The sensor is anchored by two special screws in the heartwood. The changes outside of the heartwood correspond to the radial growth. The arrangement ensures high stability for long-term measurements.


  • Stability against wind, snow, falling branches and fruits
  • Low pressure at the measuring point
  • Suitable for large trees (diameter> 8 cm)
  • Ideal for long-term measurement with less manpower


  • Trunk is injured by drilling (the damage can be minimized by tree resin)
  • Suitable only for larger trees (diameter>8 cm)


  • Complete with 5 m cable

Options / Ordering Information

  • Cable extension (please specify in meters)
  • Installation tools (tree resin, hand drill)
  • Data Logger

Technical specifications

Name Radius dendrometer (DR)
Suitable for plant size Diameter >8 cm
Range of the sensor 11 mm
Accuracy ±1.5 µm ± 0,12% (CR1000 Logger)
Resolution 0.2-2.6 µm (dependent on used data logger)
Linearity 1%
Thermal expansion coefficient of the sensor <0,2 µm/K
Operating conditions -25 to 70 °C air temperature, 0 to 100% relative air humidity