DR Ecomatik Radius Dendrometers (M-XL Stems)
For Measuring Changes in Radius of Plant Stems
Radius Dendrometers
Ecomatik Radius dendrometers are fixed with one (DR3) or two special screws (DR1 and DR2), anchored in the trunkwood. The changes outside of the trunkwood correspond to radial growth and water status related, diurnal diameter variation. The arrangement ensures high stability for long-term measurements.
The DRW is the ruggedized version of the DR1 dendrometer type. In addition to the features of the simple DR1 version, the DRW dendrometer is modified for the use under especially harsh environmental conditions. A soft, weather-resistant rubber coating, protects the whole sensor from ingress of water and solid particles.
| Type |
Radius Dendrometer Variant Name | For Diameter of | Measurement Range |
| DR1 | Radius dendrometer | >8 cm | 11 mm |
| DR2 | Radius dendrometer (for fast growing species) | >8 cm | 11 mm |
| DR3 | Radius dendrometer (with one instead of two mounting screws) | >5 cm | 25.4 mm |
| DRW | Radius dendrometer rugged | >8 cm | 11 mm |
| Name of the Sensor | Type DR1 (DR) | Type DR3 | Type DR2 |
| Use area | slow/normal growing species | fast growing species | |
| Suitable for plant diameter | > 8 cm | > 5 cm | > 8 cm |
| Range of the senor | 11 mm | 25.4mm | |
| Resolution | The resolution of the sensor itself is infinite. The resolution of readings is determined by connected data logger, e.g. | ||
| CR1000:1.5 μm Dendrometer logger DL18: 0.2 μm |
CR1000: 3.3 μm Dendrometer logger DL18: 0.5 μm |
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| Accuracy | Dendrometer dependent: Max. ± 4.5% of reading (stable offset) |
Dendrometer dependent: Max. ±1.97% of reading (stable offset) |
|
| Accuracy | Data logger dependent, e.g.: CR1000: ±(0.04% of reading +4.4μm) Dendrometer logger DL18: ±0.1% |
Data logger dependent, e.g.: CR1000: ±(0.04% of reading+10μm) Dendrometer logger DL18: ±0.1% |
|
| Temperature coefficient of the sensor | < 0.2 μm / °C in the whole range | ||
| Linearity | <1% | < 0.7% | |
| Environment Outdoor Condition | -25 to 70°C air temperature, 0 to 100% relative air humidity | ||
| Weight of the sensor without cable | 13 g | 33 g | |
| Power Supply | Stabilized Vex of 0.5 – 10 VDC, power consumption practically zero | ||
| Material | Stainless steel and Aluminium | ||
| Cable length | 5 m, extendable up to 100 m | ||