DD-L Diameter Dendrometer (large)
- DD-L1: Diameter Dendrometer 1
- Measuring plant diameter between 3 and 30cm
- range of measurement 11mm
- Linearity: 1%
- Complete With 5 m Sensor Cable, extendable To Up To 100 m.
- Cable configuration: bare ended
- Measuring plant diameter between 3 and 30cm
- DD-L2: Diameter Dendrometer 2
- Measuring plant diameter between 3 and 30cm
- range of measurement 25mm
- Linearity: 1%
- Complete With 5 m Sensor Cable, extendable To Up To 100 m.
- Cable configuration: bare ended
- Measuring plant diameter between 3 and 30cm
- DD-L3: Diameter Dendrometer 3:
- Measuring plant diameter between 3 and 30cm
- range of measurement 50mm
- Linearity: 0.5%
- Complete With 5 m Sensor Cable, extendable To Up To 100 m.
- Cable configuration: bare ended
- Measuring plant diameter between 3 and 30cm
- DDW Waterproof Diameter Dendrometer:
- A specialised diameter dendrometer for use in extremely moist conditions (such as coastal or under snow) or near the soil surface
- Measuring plant diameter between 3 and 20cm
- range of measurement 11mm
- Linearity: 1%
- Complete With 5 m Sensor Cable, extendable To Up To 100 m
- Cable configuration: bare ended
| Sensor model name | Diameter Dendrometer large
Types DD-L1 and DD-L1W (hermetically sealed) |
Diameter Dendrometer large
Type DD-L2 |
Diameter Dendrometer large
Type DD-L3 |
| Scope of application | Slow/average growth rates | Fast-growing | Very fast growing |
| Suitable for diameter | DD-L1: 3 – 30 cm; DD-L1W: 3 – 20cm | 3 – 30 cm | 3 – 30 cm |
| Special features/limitations | DD-L1W: sealed to withstand a wide range of operational conditions, see below. | Extended measurement range, for fast-growing species | Extended measurement range, for very fast-growing species |
| Measurement range | 11 mm linear | 25.4 mm linear | 50.8 mm linear |
| Resolution | Data logger dependent e.g.:
CR300 series: 0.01 µm Dendrometer logger DL18: 0.2 µm |
Data logger dependent e.g.:
CR300 series: 0.03 µm Dendrometer logger DL18: 0.5 µm |
Data logger dependent e.g.:
CR300 series: 0.05 µm Dendrometer logger DL18: 1 µm |
| Accuracy | Dendrometer dependent: max. ± 4.5% of the measured value (stable offset)
Data logger dependent e.g.: CR300 series: ± (0.04% of the measured value + 0.3 µm) Dendrometer logger DL18: ± (0.1% of the measured value + 0.45 µm) |
Dendrometer dependent: max. ± 1.97% of the measured value (stable offset)
Data logger dependent e.g.: CR300 series: ± (0.04% of the measured value + 0.6 µm) Dendrometer logger DL18: ± (0.1% of the measured value + 1 µm) |
Dendrometer dependent: max. ± 0.98% of the measured value (stable offset)
Data logger dependent e.g.: CR300 series: ± (0.04% of the measured value + 1.2 µm) Dendrometer logger DL18: ± (0.1% of the measured value + 2 µm) |
| Output signal | Analogue, 0V to Vex (excitation supply voltage) | Analogue, 0V to 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% | < 0.5% |
| Operational conditions | All Models:
normal outdoor field conditions, -25 to 70 °C, 0 to 100% relative air humidity; |
All Models:
normal outdoor field conditions, -25 to 70 °C, 0 to 100% relative air humidity |
All Models:
normal outdoor field conditions, -25 to 70 °C, 0 to 100% relative air humidity |
| Â | Hermetically Sealed Model DD-L1W:
even under extreme environmental conditions (underwater, below snow cover, under exposure to strongly corrosive substances e.g. saltwater, ash, aggressive agricultural chemicals) |
 |  |
| Weight (sensor without cable) | 13 g | 33 g | 43 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 |
