Ecomatik - DD-RO series - Root / Underwater Diameter Dendrometer
From Ecomatik - Agriculture & Forestry - Plant Growth Monitoring
The DD-RO series dendrometer is used for the high-precision and continuous measurement of plant diameter changes. This device is suitable for long-term application in outdoor conditions (underground and underwater). Due to their extremely low power consumption, Ecomatik dendrometers are ideal for battery-powered solutions, e.g., in IoT agriculture applications.
Products Details
The DRO dendrometer is specially designed to measure roots, aquatic plants and installations with ground contact, e.g. on ground cover plants. Sealed by a soft, yet resilient rubber coating protects the entire sensor and the sensor rod from the ingress of water and particles; the device is water- and dustproof. An additional metal bracket protects the signal-receiving sensor from pressure that may be exerted when buried under soil insubterranean installations. The specific weight of the entire device is similar to that of water. In underwater installations, the device’s buoyancy compensates for its own weight so that no additional load is exerted on the measurement tool.
Advantages
- Waterproof, suitable for subterranean, aboveground, and underwater applications
- Low pressure at the measuring point
- No additional load on underwater measuring objects
- Ideal for long-term measurements
Limits of the DD-RO Dendrometer
- Only suitable for diameters smaller than 2 cm (for root diameters> 2 cm on request)
Technical Data
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 |
Accessories & Compatible Products
From small and compact to an extensive measuring network, Ecomatik offers complete system solutions for sensor data acquisition in any desired size:
- Mini-Systems (e.g. DL18)
- Maxi-Systems (e.g. Campbell data logger station)
The output signal of all Ecomatik dendrometer models is an analogue DC voltage. Our dendrometers are therefore compatible with almost all common data loggers and microcontrollers with analogue voltage input channels (e.g. also Arduino). If you are unsure about the compatibility of an existing data logger, please do not hesitate to contact us.
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