ECOMATIK GmbH Root Dendrometer Type DD-RO Technical Specifications The DD-RO Dendrometers is designed for continuous measurement of roots, aquatic plants and creepers. The device is waterproof. The sensor rod is protected with soft, light-resistant rubber. The metal clamp protects the sensor from excessive pressure from top soil. It is easy to install and maintenance free. Growth curves of trunk and root of a Norway spruce, measured with circumference Dendrometer (DC1) and a root Dendrometer (DRO) in Kranzberger Forst, a study plot of the Technical University Munich Name of the Sensor Use area Suitable for Root size Range of the senor Resolution Accuracy Temperature coefficient of the sensor Linearity Environment Weight of the sensor Power supply Material Cable length Root Dendrometer Type DD-RO For measuring diameter growth of roots and aquatic plants Diameter 0-20 mm (> 20 mm on request) 11 mm 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 Dendrometer dependent: Max. ±4.5% of reading (stable offset) Logger dependent, e.g.: CR1000: ± (0.04% of reading +4.4 µm) Dendrometer logger DL18: ±0.1% <0.2 µm/°C in the whole range <1% In soil, under water or snow condition: -25 to 70C air temperature, 0 to 100% relative air humidity 30 g without cable Stabilized Vex of 0.5 – 10 VDC, power consumption practically zero Stainless steel and Aluminium 5 m, extendable up

Diameter Dendrometer Type DD-RO Growth curves of trunk and root of a Norway spruce, measured with circumference Dendrometer (DC1) and a root Dendrometer (DD-RO) in Kranzberger Forst, a study plot of the Technical University Munich