Upgraded version of DRL26C with larger memory

  • manufactured bylogo small
  • logging sensor for long term accurate monitoring of the tree trunk circumference increment
  • no upper limit in stem diameter
  • non invasive fixing
  • low maintenance, easy installation and set-up
  • increment range 64 mm
  • resolution less than micrometer
  • large logging capacity and long battery lifetime
  • infrared wireless data access
  • Mini32 software support


Measuring intervals 5 min to 4 hrs
Memory capacity with measuring interval 1 hour ca 6 years
Battery life with measuring interval 1 hour ca 5 years
Circumference increment measuring range 64 mm
Resolution less than 1μm
Internal temperature accuracy ± 0.3 °C
Protection rating IP63
Weight 350 g
Operating environment temperature  –40 to 60 °C
Operating environment humidity 0 to 100%

Non invasive fixing by tape

D RL 26 C non-invasive fixing
  • no effect on tree growth
  • integrated value for whole radial profile in measured height
  • almost identical thermal expansion of wood and stainless steel
  • battery replacement possible by keeping the sensor in position on the tree

Precise increment records

Dendrometer data
  • efficient tool for field measurement
  • comprises information of growth, water stress and freezing up of the trunk
  • low maintenance and energy requirements in comparison with sophisticated measuring systems like sap flow for instance
  • together with the measurement of soil water potential it gives realistic picture of drought stress and the tree response to it

Measure trees with different diameter by simple changing the base plate

Increment sensor Dendrometer Base plateE MS  2020  10 D RL 26 C- 26D R 26  40mm

Mini32 software

Line-up 3
  • graphically oriented software intended for work with long time series
  • automatic lining up function for increment records
  • curve fitting and growing parameters calculations
  • fast brief statistics


documentdocument 2 Datasheet
documentdocument 2 Installation manual
documentdocument 2 User manual
documentdocument 2 Battery replacement instructions
documentdocument 2 Upgrade for small diameters
For retired products find the manuals in Downloads

Dendrometer Installation