The Vertical dendrometer is developed
to determine the vertical changes (not growth) of trees continuously.
Because the trees vary in length according to water status, wind direction
and curvature, the vertical change is an interesting measure to assess the
water status, mechanical stress, stability and direction of growth of the
trees.
In order to cover the different causes (water status, curvature)
separately, a parallel measurement is of three directions with three
vertical dendrometers necessary
Advantages
■ Suitable for large trees
(diameter>8 cm)
■ Stability against wind,
snow, falling branches and fruits
Disadvantages
■ Trunk is injured by drilling (the
damage can be minimized by tree resin)
■ Suitable only for larger trees
(diameter>8 cm)
Delivery
■ 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 |
Vertical dendrometer (DV) |
|
Suitable for tree 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 |
<0,1 µm/K |
|
Thermal expansion coefficient of wire cable |
<1.4 ×10-6/K |
|
Operating conditions |
Air temperature: -30 - 40° C, air humidity: 0-100% |
