The DV dendrometer is used for high-precision and continuous measurement of vertical changes in dimension and/or curvature of tree stems. This device is suitable for long-term in outdoor conditions. Due to their extremely low power consumption, Ecomatik dendrometers are ideal for battery-powered solutions, e.g., in IoT applications.

    The DV dendrometer is designed to continuously measure vertical changes (not growth) of trees. Tree stems and their respective sections vary in length and curvature, according to water status (short- to mid-term), wind direction and wind speed (short-term to permanent), snow and fruit load (mid-term to permanent), and unbalanced growth or loss of crown parts (long-term to permanent). Transcription of vertical changes, along with their directional information, provides valuable information to assess water status and static properties of a tree (stress-strain relationship, mechanical load/stability, etc.). Parallel measurements with three vertical dendrometers (each oriented in three different cardinal directions) are necessary for a complete overview of vertical changes.


    • Stress-strain relationship computation
    • Maximum stability against wind, snow, falling branches and fruit
    • Ideal for long-term measurements


    • Installation (drilling and screwing in the anchoring screws) damages the tree trunk (which could be minimized with wound closure resin).
    • Only suitable for diameters > 8 cm



    Suitable for diameter

    Measurement range

    DV> 8 cm11 mm

    Technical data

    Sensor model name

    Vertical Dendrometer

    Type DV

    Scope of application

    Stems or branches

    Suitable for diameter

    5 – 32 cm

    Special features/limitations

    2x trunk screws for mounting

    Measurement range

    11 mm linear


    Data logger dependent e.g.:

    CR300 series: 0.01 µm

    Dendrometer logger DL18: 0.2 µm


    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

    Temperature coefficient of the stem embracing cable wire

    < 1.4 ×10-6/K


    < 1%

    Operational conditions

    Normal outdoor field conditions, -25 to 70 ° C, 0 to 100% relative air humidity; unsuitable underwater and below snow cover

    Weight (sensor without cable)

    13 g

    Power supply

    Vex (! stabilized !) 0.5 to 10 VDC,

    Power consumption max. 0.28 µWh per measurement


    Stainless steel and aluminium


    Technical data sheets

    Special information for integrators & developers

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    Accessories & Compatible Products

    Data loggers

    From small and compact to an extensive measuring network, Ecomatik offers complete system solutions for sensor data acquisition in any desired size:


    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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    Your contact details and Assessment of your needs

    Like so many things, everything started with an idea ...

    In the case of the plant scientist and founder of ECOMATIK, Dr. Liu, it was the idea that modern measurement technology should enable crucial plant physiological parameters to be measured directly, precisely and with high temporal resolution on the plant itself. It was obvious to him that there is an information potential of immense value in the detailed understanding of immediate reactions of plants to their environment...