DC Circumference Dendrometer

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

Changes in stem circumference are recorded by a metal cable that wraps around the stem. This cable is comprised of a special alloy with the lowest possible coefficient of thermal expansion. Friction and pressure between the cable and the stem surface are minimized by special slide rings.

The simplest model in the DC series, the DC1, is attached to the measuring object by the tension of the spring-loaded cable. The tension force is imparted tangentially, and the circumferential signal is recorded directly via the metal cable.

DC3 and DC4 are improved versions of the DC series. The tension force exerted by the sensor spring is transmitted to the measuring wire in radial, and not tangential (cf. DC1), direction. This patented, special design of the DC3 and DC4 dendrometers significantly improves the comparability of the measurement data from objects of different diameters. Additionally, this design ensures a consistently stable installation on objects with both small and very large diameters (more information: difference between the various circumferential dendrometers).


  • Maximum stability against wind, snow, falling branches and fruits
  • Easy and injury-free installation

Specific to the DC3 & DC4 models

  • Suitable for all stem diameters (> 5 cm)
  • Improved data comparability between measurements on tree diameters
  • Exact measurements (even with very large trees)


  • Not suitable for measurements underwater nor under snow cover
  • Specific to the DC1 model

  • Measurement data between trees with very different diameters are usually not comparable.
  • Measurement values on trees with increasing diameter may be problematic due to the decreasing contact pressure between cable and trunk surface.
  • Specific to the DC3 & DC4 models

  • Raw measurement data must be converted to circumference in mm (Excel program available)
  • The cross-section of the measurement object should be approximately circular


Model nameSuitable for diametersMeasurement range
DC15 – 32 cm11 mm
DC3> 5 cm25.4 mm
DC4> 5 cm50.8 mm


Technical data sheets

Additional information

Special information for integrators & developers

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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.

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.

Do you require our assistance before placing an order?

We’re happy to help! So that we can provide you with accurate and helpful advice, please first fill out the above online form with your request and send it our way. We will then immediately review your details and contact you.

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...