D6 Permanent Tree Girth

Strain gage based tree growth-sensor

Typical Applications

• Continuous high-resolution measuring of daily circumferential variation of trunks or branches

Advantages

• Non-invasive installation
• No disturbance of growth
• Measuring of daily changes
  and immediate
  reactions, e. g. to rain
• Minimisation of the friction
  on the bark with Teflon layer
• Invar steel girth cable with
  minimal dependence on
  temperature
• Measuring range expandable by adjusting of the cable

Limitations

• Strain-gage caused measuring complexity