DD-L Diameter Dendrometer Large

    The DD-L series dendrometers are used for high-precision and continuous measurement of stem diameter changes. These devices are suitable for long-term application in outdoor conditions. Due to their extremely low power consumption, Ecomatik dendrometers are ideal for battery-powered solutions, e.g., in IoT applications.

    DD-L dendrometers are specially designed for small- to medium-sized stems and branches (with diameters ranging from 3 to 30 cm; DD-L1W, max. 20 cm diameter). DD-L dendrometers are fixed to the measuring object with two UV-resistant elastic bands. This simple and very stable mounting method fixes the sensor at the desired measuring point without exerting excessive pressure on the trunk surface. DD-L dendrometers are available in four versions:

    1. DD-L1: with a measuring range of 11 mm for species with slow and average growth rates.
    2. DD-L2: larger measuring range of 25 mm for fast-growing species.
    3. DD-L3: larger measuring range of 50 mm for very fast-growing species.DD-L1W (previously DDW): hermetically sealed to withstand extreme environmental conditions, e.g. high humidity, underwater, below snow cover, near the ground surface, elevated exposure to dust or corrosive agents (e.g. coastal sands, volcanic ash), etc. The DD-L1W is (suitable for trunk diameters between 3 and 20 cm)

    Advantages

    • Suitable for small to medium stems and branches with diameters between 3 and 30 cm (DD-L1W, 3 – 20 cm)
    • Lightweight sensor
    • Injury-free installation, minimal pressure on the plant
    • Maximum stability against wind, snow, falling branches and fruit
    • Diameter-specific frame size available for diameters ranging from 3 – 30 cm

    Specific to the DD-L2 & DD-L3 models

    • Extended measuring range; reduced maintenance effort (i.e. longer time interval between readjustment of the dendrometer frame) for fast-growing species

    Specific to the DD-L1W model

    • Hermetically sealed to withstand extreme environmental conditions: e.g. high humidity, underwater, below snow cover, near the ground surface, elevated exposure to dust or corrosive agents (e.g. coastal sands and salt, volcanic ash), etc.

    Limits of the DD-L series

    • Not suitable for diameters > 30 cm (or > 20 cm DD-L1W), (see types DC and DR for diameters > 30 cm)

    Specific to the DD-L1, DD-L2 & DD-L3 models

    • Not suitable for operation under extreme environmental conditions: e.g. high humidity, underwater, below snow cover, near the ground surface, elevated exposure to dust or corrosive agents (e.g. coastal sands, volcanic ash), etc. (see model DD-L1W)

    Models

    ModelsSuitable fordiameterMeasurement range
    DD-L13 - 30 cm11 mm
    DD-L23 - 30 cm25 mm
    DD-L33 - 20 cm50 mm
    DD-L1W (hermetically sealed)3 - 20 cm11 mm

    Technical data

    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-LW: 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;

    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)

    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

    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

    Manuals

    Technical data sheets

    Video installation guides

    DD-L
    DD-L1W

    Special information for integrators & developers

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    Accessories & Compatible Products

    Data loggers

    Von klein und kompakt bis hin zum ausgebauten Messnetzwerk, Ecomatik bietet fertige Systemlösungen zur Sensordatenerfassung in jeder gewünschten Größe:
    Mini-Systeme (z.B. DL18)
    Maxi-Systeme (z.B. Campbell Datenlogger)

    Note

    Das Ausgangssignal aller Ecomatik Dendrometermodelle ist eine analoge Gleichspannung. Unsere Dendrometer sind daher kompatibel mit nahezu allen gängigen Datenloggern, und Microcontrollern mit analogen Spannungs-Eingangskanälen (z.B. auch Arduino). Bei Unsicherheiten bezüglich der Kompatibilität eines vorhandenen Datenloggers, können Sie gerne jederzeit mit uns Kontakt aufnehmen.

    Contact

    You need a quotation, have questions about a product, or need extensive technical advice in the context of your project planning. Starting with an initial determination of your needs, through the detailed planning of the required measurement equipment and data transmission technology, up to professional implementation on site, we are at your disposal at any time with advice and action.

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    Assessment of your needs

    With your consideration and input, we determine which of our products best meet your needs. We are also happy to design fully-integrated measuring stations (plant, climate, soil sensors), including an independent power supply and mobile data transmission, depending on your requirements.

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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...