• manufactured bylogo small
  • diameter sensor PDS40P with small datalogger Minikin PTi
  • intended for stem diameter from 5 to 40 mm
  • built-in datalogger temperature
  • resolution less than two micrometers
  • non invasive fixing
  • intended for long-term monitoring
  • low maintenance, easy installation and set-up
  • large logging capacity and long battery lifetime
  • infrared wireless data access
  • Mini32 software support


Measuring range 5 to 40 mm
Resolution 1.24 μm
Measuring intervals 1 min to 4 hrs
Memory capacity with measuring interval 1 hour ca 3 years
Battery life with measuring interval 1 hour ca 5 years
Datalogger internal temperature accuracy ± 0.3 °C
Protection rating IP68
Size of datalogger (diameter x length) 21 x 100 mm
Weight of sensor 160 g
Weight of datalogger 40 g
Operating environment temperature  –40 to 60 °C
Operating environment humidity 0 to 100%

Non invasive fixing

Pivot dendrometer sensor on tree
  • no effect on tree growth
  • battery replacement possible by keeping the sensor in position on the tree

Precise stem diameter records

Diameter P DS data
  • efficient tool for field measurement
  • comprises information about growth, water stress and freezing up of the stem
  • low maintenance and energy requirements compared to sophisticated measuring systems such as sap flow for instance
  • together with soil water potential measurement it gives realistic picture of drought stress and the tree response to it

Mini32 software

Pivot dendrometer Infrared wireless download
  • graphically oriented software intended for work with long time series
  • automatic lining up function for diameter records
  • curve fitting and growing parameters calculations
  • fast brief statistics


documentdocument 2 Datasheet

Dendrometer Installation


Main parts