DBV60 Voltage Band Dendrometer
Accurately measure and monitor tree growth rates
Whole tree water relations research has just become easier and more accurate. The DBV60 Voltage Band Dendrometer is similar to the DBL60 Logging Band Dendrometer however has a cable for the connection to a DEN1 Dendrometer Meter or other voltage logger. Standard cable lengths are 5m however can be extended as needed.
The DBV60 is the dendrometer of choice for telemetry systems and remote data logging platforms. Combined with the MCC2G, data measured by the DBV60 can be downloaded anywhere in the world where GSM is available.
DBV60 Voltage Dendrometer Band – 60 mm Features
- Non-invasive fixing
Dendrometry Data
Stem diameter is one of the most commonly measured attributes of trees. Dendrometers are used to measure the diameter of fruits, plants and trees. High resolution dendrometers are used to monitor the diurnal swelling and shrinkage of stems. During the day stems “shrink” as stomata open and the tree transpires. At night the stem “swells” due to cessation of transpiration and trunk refilling of moisture.
Maximum Daily trunk Shrinkage (MDS), the calculated difference in daily minimum and maximum stem diameter, is a commonly used parameter in irrigation scheduling. Significant crop research has been undertaken in this field to explore the correlation of MDS to physiological and abiotic parameters including soil moisture and water potential, vapor pressure deficit (VPD) and stem water potential.
Seasonal datasets can be used to compare fertilisation treatments, pruning, thinning or drought treatments. In forestry dendrometers are used for long term data collection in the study of growth dynamics, biomass allocation and carbon uptake. In horticulture Dendrometers are used to monitor MDS for irrigation management.
Band Dendrometers
Dendrometer bands are a long accepted and widely used method of measuring tree circumference and can provide changes in tree diameter at breast height (DBH), basal area, and basal area increment. The DBS60 Band Dendrometer is a high resolution (1μm [0.001mm]), non-invasive sensor capable of measuring a wide range of diameters (50mm>). The stainless-steel band has a very low linear thermal co-efficient. Thermal variations caused by daily or seasonal changes in temperature have no measurable impact on the measurement accuracy. The DBS60 is IP66 rated and is designed to be installed in the harshest field conditions for years at a time.
| Increment sensors type |
rotary position
|
| Range | 64 mm of circumference |
| Linearity |
2% of full scale
|
| Resolution |
step-less
|
|
Accuracy
|
according to datalogger spec |
|
Tape strength
|
15 to 20 N in the whole range, stem diameter independent
|
|
Tape temperature coefficient:
|
1.6 x 10-5
|
| Operating range: | |
| – Temperature |
-30 to 60°C
|
| – Humidity | 0 to 100% |
| Size | 100 x 70 x 100 mm |
| Weight |
ca 260 g
|
|
Minimal stem diameter
|
8 cm |
|
Increment range
|
65mm |
| Tightening strength | 15 to 20 N |
Vandegehuchte, M. W., Guyot, A., Hubau, M., De Groote, S. R. E., De Baerdemaeker, N. J. F., Hayes, M., … Steppe, K. (2014). Long-term versus daily stem diameter variation in co-occurring mangrove species: Environmental versus ecophysiological drivers. Agricultural and Forest Meteorology, 192–193, 51–58. https://doi.org/10.1016/j.agrformet.2014.03.002
Vandegehuchte, M. W., Guyot, A., Hubeau, M., De Swaef, T., Lockington, D. A., & Steppe, K. (2014). Modelling reveals endogenous osmotic adaptation of storage tissue water potential as an important driver determining different stem diameter variation patterns in the mangrove species Avicennia marina and Rhizophora stylosa. Annals of Botany, 114(4), 667–676. https://doi.org/10.1093/aob/mct311