Band Dendrometers
High resolution band dendrometers for trees and plants
ICT International offer a range of band dendrometers for the measurement of tree and plant growth rates. Data can be stored internally, or the dendrometer can be connected to an external logger or integrated with Internet of Things (IoT) nodes for communication of data.
- High resolution diameter change, measures daily shrinkage/swelling and long term growth
- Band dendrometer for large diameter trees and plants,
- Available in SDI-12 (DBS60), Voltage (DBV60) versions, and self logging (DBL60)
Suitable for developing irrigation and fertigation strategies of trees and plants, band dendrometers are high resolution dendrometers, capable of measuring changes of 0.001 mm. All DB-60 series band dendrometers have a minimum measurement of 80mm, and an upper limit defined by the length of band tape (15m). Each dendrometer can measure 64mm before requiring adjustment.
The DB-60 series has a measurement resolution of 0.001 mm, and the DBL60 can store up to 50,000 readings (approximately 4 years at hourly intervals) whilst the DBS60 and DBV60 use external loggers with either internal storage (DEN1 or SDI-12 Logger) or IoT connection for cloud visualisation and storage (SNiP-DBS).
- DBL60 Logging Band Dendrometer: Self-contained logger with Infra-Red connection for downloading data.
- DBV60 Voltage Band Dendrometer: Voltage signal output.
- DBS60 SDI-12 Band Dendrometer: SDI-12 output.
- SNiP-DBS6 SDI-12 Band Dendrometer with MFR-Node for IoT Connection
Measurements
| Â | DBL60 (Logging) | DBV 60 (Voltage) | DBS 60 (SDI-12) | SNiP-DBS6 |
| Minimum Stem Diameter | 80 mm | 80 mm | 80 mm | 80 mm |
| Maximum Stem Diameter | No limit | No limit | No limit | No limit |
| Range | 64 mm of circumference | 64 mm of circumference | 64 mm of circumference | 64 mm of circumference |
| Increment Range | 65 mm | 65 mm | 65 mm | 65 mm |
| Resolution | 0.001 mm (1µm) | Stepless* | 0.001 mm (1µm) | 0.001 mm (1µm) |
| Linearity | 2% of full scale | 1% of full scale | 1% of full scale | 1% of full scale |
| Frequency | 5 mins to 4 hours | User defined in logger | User defined in logger | User defined on MFR-Node |
Communications and logging
| DBL60 (Logging) | DBV 60 (Voltage) | DBS 60 (SDI-12) | SNiP-DBS6 | |
| Memory Capacity | 50,000 readings or 4 years at hourly readings | NA | NA | MFR-Node stores on an internal SD Card as well as forwarding to IoT dashboard |
| Communications | Infrared | Analogue (Voltage) | SDI-12 | CAT-M1/NB-IoT or LoRaWAN |
Power Requirements
| Â | DBL60 (Logging) | DBV 60 (Voltage) | DBS 60 (SDI-12) | SNiP-DBS6 |
| Battery Capacity | Approx 4 years at 10 minute intervals | NA | NA | NA |
| Type | Internal Lithium | NA | NA | NA |
| Power Input | NA | 5 to 16 volt | 5.5 to 16 volt | 5.5 to 16 volt |
| Power Consumption (Idle) | NA | NA | 20µA | 20µA |
| Power Consumption (Measuring) | NA | 1mA | 6mA | 6mA |
Tape specification
| Strength | 15 to 20 N |
| Tape Spool Length | 15 m |
| Tape Spool Width | 12 mm |
| Tape temperature coefficient | 61 μm/m,K |
Band Dendrometers
