Sensor Name and Type: Vertical Dendrometer, Type DV

Purpose: Designed for measuring vertical variations in tree trunk diameter.

Suitable Plant Size: Trees with a diameter greater than 8 cm.

Limitations: Installation involves drilling into the tree trunk, which can cause injury. The damage can be minimized by using tree resin.

Measurement Range: 11 mm

Resolution: Infinite resolution for the sensor itself. Reading resolution depends on the data logger used, such as 1.5 µm with CR1000 and 0.2 µm with Dendrometer logger DL18.

Accuracy: Sensor accuracy is a maximum of ±4.5% of the reading. Logger accuracy varies, e.g., CR1000 has ± (0.04% of reading +4.4 µm) and DL18 has ±0.1%.

Temperature Coefficient: Sensor: <0.2 µm across the range. Wire cable: <1.4 ×10^-6/k.

Linearity: Less than 1%.

Environmental Conditions: Suitable for outdoor use in temperatures from -25 to 70°C and 0 to 100% relative humidity.

Weight: 13 g without cable.

Power Supply: Requires a stabilized voltage of 0.5 – 10 VDC with negligible power consumption.

Materials: Constructed from stainless steel and aluminium.

Cable Length: 5 m, extendable up to 100 m.