DR Radius Dendrometer
Overview
Features
Details
Specifications
Case Studies and Downloads
Overview
Ecomatik radius dendrometers measure plant stem diameters over 5cm (DR3) and 8cm (DR1, DR2 and DRW). Highly recommended for continuous monitoring and measurements of stem diameter changes.
Measuring ranges of 11 mm or 25mm (depending on variation) and with linearity of 1%.
All dendrometers are supplied with a bare ended 5m sensor cable, extendable up to 100m.
Features
Details
- DR1: Radius Dendrometer 1
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- Tree diameter >8cm
- Measuring range 11 mm
- Linearity 1%
- DR2: Radius Dendrometer 2
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- Tree diameter >8cm
- Measuring range 25 mm
- Linearity: 1%
- DR3: Radius Dendrometer 3
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- Fast mount bracket (one screw)
- Tree diameter >5cm
- Measuring range 11 mm
- Linearity 0.5%
- DRW: Waterproof Radius Dendrometer
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- A specialised radius dendrometer for use in extremely moist conditions (such as coastal or under snow) or near the soil surface
- Measuring plant diameter >8cm
- Range of measurement 11mm
- Linearity: 1%
Specifications
Sensor model name |
Radius dendrometer Type DR1 and DR1W (hermetically sealed) | Radius dendrometer Type DR2 |
Radius dendrometer Type DR3 and DR3W (hermetically sealed) |
| Scope of application | Slow/average growth rates | Fast-growing | slow/normal growth rates |
| Suitable for diameter | > 8 cm | > 8 cm | > 5 cm |
| Special features/limitations | 2x trunk screws for mounting | Extended measurement range for fast-growing species,
2x trunk screws for mounting |
Only 1 trunk screw for mounting, less invasive; dual point installation possible: separate measurement of wood and bark (requires 2 DR3 sensors) |
| Measurement range | 11 mm linear | 25,4 mm linear | 11 mm linear |
| Resolution (Data logger dependent) | CR300 series: 0.01 μm
Dendrometer logger DL18: 0.2 μm |
CR300 series: 0.03 μm
Dendrometer logger DL 18: 0.5μm |
CR300 series: 0.01μm
Dendrometer logger DL18: 0.2μm |
| Accuracy (Dendrometer dependent) | max. ± 4.5% of the measured value (stable offset) | max. ± 1.97% of the measured value (stable offset) | max. ± 4.5% of the measured value (stable offset) |
| Accuracy
(Data logger dependent) |
CR300 series: ± (0.04% of the measured value +0.3 μm)
Dendrometer logger DL18: ± (0.1% of the measured value +0.45 μm) |
CR300 series: ± (0.04% of the measured value +0.6μm)
Dendrometer logger DL18: ± (0.1% of the measured value +1 μm) |
CR300 series: ± (0.04% of the measured value +0.3 μm)
Dendrometer logger DL18: ± (0.1% of the measured value +0.45 μm) |
| Output signal | Analogue, 0V to Vex (excitation supply voltage) | Analogue, 0V bis Vex (excitation supply voltage) | Analogue, 0V to Vex (excitation supply voltage) |
| Temperature drift of the sensor | < 0.2 µm/°C in the whole measurement range | < 0.2 µm/°C in the whole measurement range | < 0.2 μm/°C in the whole measurement range |
| Linearity | < 1% | < 0,7% | < 1% |
| Operational conditions | normal outdoor field conditions, -25 to–70 °C, 0 to–100% relative air humidity; | normal outdoor field conditions,-25 to 70 °C, 0 to 100% relative air humidity | normal outdoor field conditions, -25 to70 °C, 0 to 100% relative air humidity; |
| Hermetically Sealed Model DR1W:
extreme environmental conditions including underwater, below snow cover, under exposure to strongly corrosive substances e.g. saltwater, ash, aggressive agricultural chemicals |
Hermetically Sealed Model DR3W:
extreme environmental conditions including underwater, below snow cover, under exposure to strongly corrosive substances e.g. saltwater, ash, aggressive agricultural chemicals |
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| Weight (sensor without cable) | 13 g (DR1), 17 g (DR1W) | 33 g | 13 g |
| Power supply | Vex (! stabilized!) 0.5 to 10 VDC,
Power consumption max. 0.28 μWh per measurement |
Vex (! stabilized!) 0.5 to 10 VDC, Power consumption max. 0.28 μWh per measurement | Vex (! stabilized!) 0.5 to 10 VDC, Power consumption max. 0.28 μWh per measurement |
| Material | Stainless steel and aluminium | Stainless steel and aluminium | Stainless steel and aluminium |
| Sensor cable length | 5 m, extendable on request to max. 100 m | 5 m, extendable on request to max. 100 m | 5 m, extendable on request to max. 100 m |
Case Studies and Downloads
