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 model name

Radius dendrometer Type DR1 and DR1W (hermetically sealed)Diameter Dendrometer Small Types DD-S2 and DD-S2W (hermetically sealed)

Scope of application

Slow/average growth ratesSlow/average growth rates

Suitable for diameter

0 to 5 cm

0 to 5 cm

Special features/limitations

Fixation with a standard mounting frame

Fixation with quick-mount frame, much easier and faster installation, DD-S2W: sealed to withstand with a wide range operational conditions; see below.

Measurements range

11 mm linear

25,4 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: 0.01 μm

Dendrometer logger DL 18: 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)
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)

Analogue, 0V bis 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

Linearity

< 1%

< 1%

Operational conditions

All Models:

normal outdoor field conditions, -25 to–70 °C, 0 to–100% relative air humidity

All Models:
normal outdoor field conditions,-25 –70 °C, 0 to 100% relative air humidity;

Hermetically Sealed Model DR1W: even under extreme environmental conditions (underwater, below snow cover, under exposure to strongly corrosive substances e.g. saltwater, ash, aggressive agricultural chemicals)

Weight (sensor without cable)

13 g

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

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

Material

Stainless steel and aluminiumStainless steel and aluminium

Sensor cable length

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

Video Guide DD-S1
Video Guide DD-S2

Special information for integrators & developers

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You would like to gain an insight into our worldwide customer base or some of our interesting projects? You are interested in our certificates and awards or in some selected scientific publications?

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

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.

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.

General information on order processing

Thank you for your interest in our products and services! Here you will find important information about the ordering process:

To our international customers: Please note, we ship worldwide! If we do not currently have a listed distributor in your country (a list can be found here) , please feel free to contact us directly.

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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Are you already familiar with our products and know exactly what you need?

Perfect, then just write us an email! In your order, please state the diameter of your measuring objects in addition to the required cable lengths.

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...