DFFruit and Vegetable Dendrometer

The DF series dendrometers are used for high-precision and continuous measurement of fruit and vegetable growth. 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.

DF fruit and vegetable dendrometers are specially designed to measureme on fruit bodies of different sizes and shapes. This design allows for stable fixation of the fruit in the dendrometer frame without affecting fruit growth. During installation, the dendrometer frame is flexibly attached to a branch/shoot from which the fruit hangs. The dendrometer thus bears the weight of the fruit (i.e. the fruit does not bear the weight of the dendrometer). This mechanism prevents placing additional strain on the stalk and thus damage to the fruit. DF dendrometers are available in three versions:

  1. DF1: with a measuring range of 11 mm for small fruits (e.g. cherries, grapes).
  2. DF2: larger measuring range of 25 mm for medium-sized and fast-growing fruits (e.g. plums, nuts, tangerines, apricots)
  3. DF3: larger measuring range of 50 mm for large and fast-growing fruits (e.g. apple, orange, pumpkin with a large frame)


  • Suitable for diameters between 0 and 5 cm (DF1) or 0 and 13 cm (DF2, DF3, larger diameters for DF3 on request)
  • No extra weight load on the fruit
  • Records when ripening occurs in the case of soft fruit and vegetable varieties
  • Injury-free installation
  • Minimal pressure on the measuring point
  • Maximum stability against wind, snow, falling branches and fruit
  • Reliable measurement values

Specific to the DF2 & DF3 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 DF3 model

  • accomodates larger diameters up to 100 cm (e.g. pumpkin) on request


  • Not suitable for fruits that are too soft (e.g. ripe raspberries)


Model name

Suitable for diameter

Measurement range

DF1< 5 cm11 mm
DF20 bis 13 cm25 mm
DF30 bis 13 cm (> 13 on demand)50 mm


Technical data sheets

Video installation guides

Video Guide DF Dendrometer

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)


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.


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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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...