DD-S Diameter Dendrometer small

    The DD-S 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-S dendrometers are specially designed for small trees and branches as well as agricultural plants (diameter < 5 cm). The optimized device mounting enables stable installation without exerting excessive pressure on the measuring point. DD-S dendrometers thus deliver stable readings even on very small and herbaceous plants. DD-S dendrometers are available in three versions:

    1. DD-S1: with standard mounting frame

    2. DD-S2: with quick-mount frame

    3. DD-S2W: with a quick-mounting frame and hermetically sealed to withstand extreme environmental conditions (under snow cover, underwater, elevated exposure to dust and corrosive agents)

    Advantages of the DD-series

    • Suitable for small trees and branches as well as agricultural plants with a diameter < 5 cm-Lightweight sensor
    • Plants do not have to bear the weight of the sensor (requiresa separate supportaccessory for very small and sensitive plants)
    • Injury-free installation, minimal pressure on the plant
    • Stability against wind, snow, falling branches and fruits

    Specific to the DD-S2 & DD-S2W models

    • Quick mounting frame for fast, easy and tool
    • free installation ofthe measuring object

    Specific to the DD-S2W 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-S series

    • Not suitable for diameters > 5 cm (see type DD-L)

    Specific for the DD-S1 & DD-S2 models

    • Not suitable for operation under extreme environmental conditions: e.g. high humidity, underwater, below snow cover, near the ground surface, elevatedexposure to dust or corrosive agents (e.g. coastal sands, volcanic ash), etc.(seemodel DD-S2W)

    Models

    ModelsSuitable for diametersMeasurement range
    DD-S10 – 5 cm11 mm
    DD-S2 (quick-mount frame)0 – 5 cm11 mm
    DD-S2W (quick-mount-frame, hermetically sealed)0 – 5 cm11 mm

    Technical data

    Sensor designation

    Small diameter dendrometer
    Type DD-S1

    Small diameter dendrometer
    Type DD-S2 and DD-S2W (encapsulated)

    Application range

    		slow/normal growingslow/normal growing

    Suitable for

    Diameter: 0 to 5 cm

    Diameter: 0 to 5 cm

    Special feature / limitation

    Non-invasive mounting

    Mounted with standard clamping frame

    Non-invasive mounting

    Mounted with quick clamping frame, significantly easier and faster installation; DD-S2W: encapsulated with extended application range, see operating conditions below.

    Measurement range

    11 mm linear

    11 mm linear

    Resolution

    Depends on data logger, e.g.:
    CR300 series: 0.01 µm
    Dendrometer Logger DL18: 0.2 µm

    Depends on data logger, e.g.:
    CR300 series: 0.01 µm
    Dendrometer Logger DL18: 0.2 µm

    Accuracy

    Depends on dendrometer: max. ± 4.5% of measured value (stable offset)
    Depends on logger, e.g.
    CR300 series: ± (0.04% of measured value +0.3 µm)
    Dendrometer Logger DL18: ±(0.1% of measured value +0.45 µm)

    Depends on dendrometer: max. ± 4.5% of measured value (stable offset)
    Depends on logger, e.g.
    CR300 series: ± (0.04% of measured value +0.3 µm)
    Dendrometer Logger DL18: ±(0.1% of measured value +0.45 µm)

    Output signal

    Analog: 0 V to Vex (supply voltage)

    Digital, SDI-12: Output in µm

    Analog: 0 V to Vex (supply voltage)

    Digital, SDI-12: Output in µm

    Data logging

    Flexible options for data logging & transmission:

    1. Data logger, manual readout (analog or SDI-12, e.g. DL18 or CR350)
    2. LoRaWAN, wireless data transmission (analog, e.g. IoP-S-LA)
    3. NB-IoT (analog, e.g. IoP-S-NA, IoP-S-LTEMA)

    Flexible options for data logging & transmission:

    1. Data logger, manual readout (analog or SDI-12, e.g. DL18 or CR350)
    2. LoRaWAN, wireless data transmission (analog, e.g. IoP-S-LA)
    3. NB-IoT (analog, e.g. IoP-S-NA, IoP-S-LTEMA)

    Sensor temperature coefficient

    <0.2 µm/°C over the entire measurement range

    <0.2 µm/°C over the entire measurement range

    Linearity

    <1%

    <1%

    Operating conditions

    All models:

    Normal outdoor conditions, -25 to 70 °C, 0 to 100% relative humidity

    All models:

    Normal outdoor conditions, -25 to 70 °C, 0 to 100% relative humidity;

    Encapsulated model DD-S2W:

    Also under extreme environmental conditions (underwater, below snow cover, highly corrosive substances such as salt water, ash, aggressive agricultural chemicals)

    Sensor weight (without cable)

    13 g

    15 g (DD-S2), 25 g (DD-S2W)

    Power supply

    Vex (! regulated !) 0.5 to 10 VDC,
    Power consumption max. 0.28 µWh per measurement

    Vex (! regulated !) 0.5 to 10 VDC,
    Power consumption max. 0.28 µWh per measurement

    Material

    Stainless steel and aluminium

    Stainless steel and aluminium

    Sensor cable length

    5 m, extendable to max. 100 m

    5 m, extendable to max. 100 m

    Manuals

    DD-S1

    DD-S1(264.6 kB)

    DD-S2

    DD-S2(231.7 kB)

    Technical data sheets

    DD-S1, DD-S2 & DD-S2W

    DD-S1 & DD-S2(227.4 kB)

    Video installation guides

    Video Guide DD-S1
    Video Guide DD-S2

    Special information for integrators & developers

    Dendrometer to datalogger

    Dendrometer to datalogger(94.8 kB)

    Dendrometer cable wire assignment

    Dendrometer cable wire assignment(123.1 kB)

    Dendrometer temperature sensitivity test

    Dendrometer temperature sensitivity test(540.4 kB)

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    Accessories & Compatible Products

    Data logging

    From small and compact solutions to fully developed measurement networks, Ecomatik offers turnkey system solutions for sensor data acquisition in any required size:

    • IoP systems (Internet of Plants) for wireless sensor data acquisition at freely positionable measurement points. Customer-specific preconfigured plug-and-play systems with online data visualization and data transmission via NB-IoT/LTE-M or LoRaWAN.
       
    • Mini systems with compact 4-channel data logger (DL18 and DL18-BLE) for flexible long-term measurements under field conditions. Compact and robust systems for connecting various sensors and decentralized measurement points.
       
    • Maxi systems for customer-specific system integration and individual measurement installations. From planning to implementation of complex measurement networks including sensors, power supply, and data transmission.
       
    • SDI-12 converter for analog signals for converting analog sensor signals into digital SDI-12 data. Enables the integration of ECOMATIK sensors into measurement systems without suitable analog inputs.

    Note

    The output signal of all Ecomatik dendrometers is an analog DC voltage. In addition, digital SDI-12 interfaces are available depending on the sensor model. Our dendrometers are therefore compatible with almost all common data loggers and microcontrollers with analog voltage input channels (e.g. Arduino) and can also be integrated into digital measurement systems via SDI-12. If you are unsure about the compatibility of an existing data logger or measurement system, please feel free to contact us at any time.

    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...