Pivot diameter sensor EMS PDS40 S

Product Group: Sensors
  • manufactured bylogo small
  • digital sensor for accurate monitoring of stem diameter
  • intended for stem diameter from 5 to 40 mm
  • resolution less than two micrometers
  • non invasive fixing
  • digital SDI-12 output
  • intended for long-term monitoring
  • low maintenance and easy installation


Output SDI-12 version 1.3
Measuring range 5 to 40 mm
Resolution 1.24 μm
Protection rating IP67
Weight of sensor 160 g
Operating environment temperature  –40 to 60 °C
Operating environment humidity 0 to 100%

Precise stem diameter records

Diameter P DS data
  • no effect on tree growth
  • efficient tool for field measurement
  • comprises information about growth, water stress and freezing up of the stem
  • 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

SDI-12 data output

  • asynchronous serial communications protocol for intelligent micro-processor based sensors
  • sensor typically takes a measurement, makes computations based on the raw sensor reading, and outputs the measured data in engineering units
  • allows connection of set of sensors serially on one cable line


documentdocument 2 Datasheet

Dendrometer Installation