DRO Root and Underwater Dendrometer
Overview
Features
Details
Specifications
Case Studies and Downloads
Overview
The DRO Root and underwater Dendrometers are designed for measuring plant root diameter and plant diameter changes in the aquatic habitat or water. Applicable for precise measurements and continuous monitoring of plant changes below the upper soil surface and water bodies.
Features
Details
The standard configuration is:
- measuring root/plant Diameter < 20 mm
- Measuring range 11 mm,
- linearity <1%.
- Available as standard with a 5m bare ended sensor cable
Options include root/plant diameter >20 mm, and cable extended up to 100m on request.
Specifications
| Sensor model name | Root/Underwater Dendrometer
Type DD-RO (hermetically sealed) |
| Scope of application | Slow/average growth rates |
| Suitable for diameter | 0 – 2 cm (> 2 cm on request) |
| Special features/limitations | Sealed to withstand with a wide range of operational conditions; see below. |
| Measurement range | 11 mm linear |
| Resolution | Data logger dependent e.g.:
CR300 series: 0.01 µm Dendrometer logger DL18: 0.2 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) |
| Output signal | Analogue, 0V to Vex (excitation supply voltage) |
| Temperature drift of the sensor | <0.2 µm/°C in the whole measurement range |
| Linearity | <1% |
| Operational conditions | Hermetically Sealed Model DD-RO:
normal outdoor field conditions, -25 to 70 °C, 0 to 100% relative air humidity, even under extreme environmental conditions (underwater, below snow cover, under exposure to corrosive substances e.g. salt water, ash, aggressive agricultural chemicals) |
| Weight (sensor without cable) | 30 g |
| Power supply | Vex (! stabilized !) 0.5 to 10 VDC,
Power consumption max. 0.28 µWh per measurement |
| Material | Stainless steel and aluminium |
| Sensor cable length | 5 m, extendable on request to max. 100 m |
Case Studies and Downloads
