TR Turoni 53502 Durometer Non-Destructive Fruit Ripeness Testers for Cherries

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  • Instrument that, by means of its absorbency properties, allows to measure the chlorophyll's content in a fruit. Specific version for cherries
  • The DA-Meter - developed by Prof. Costa's team from the University of Bologna - is an instrument that, by means of its absorbency properties, allows to measure the chlorophyll's content in a fruit. The content in chlorophyll in a fruit is a precise index of a fruit's ripening state. Thus, the DA-Meter allows to know the ripeness state, and the way it works does not depend on the season’s weather conditions, a factor which influences other kinds of measurement such as the brix index.


Range0 to 3 DA
Working Temperature0 to 70°C
Memory2 giga bytes
Download DataUSB port
Batteries3 1.5V AAA
Weight320 grams
Dimensions165 x 80 x 50mm
  • £4990.00

The Shore durometer is a device for measuring the hardness of a material, typically of polymers, elastomers, and rubbers. Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Lower numbers indicate less resistance and softer materials

In fruit and vegetables, establishing the optimal harvest time is a crucial issue, since fruit shelf-life potential and quality are closely related to the ripening stage at the harvest. In cold store it is very important to establish maturity changes as well.

The DA index, measured with the DA-Meter, is useful at many stages in the production and consumption's cycle of fruit. As a matter of fact, it can be used:

  1. by the farmer, in order to optimize the trees pruning, to obtain a very homogeneous product and, as a result, to reduce the number of picking stages;
  2. by the farmer, during the harvest-time, in order to identify the best moment for the picking;
  3. in the cold rooms, in order to know the maturation state of the stored fruit;
  4. in the packing-house, the DA-Meter has been used to select the correct fruit for different marketing destinations (less ripe fruit for distant markets, riper fruit for local market). 
  5.  at the retailer, in order to buy products at the intended maturation level and in order to select the most ripened product for selling.

The DA-Meter is a very promising tool both for practical and scientific applications, since it allows to monitor on-tree fruit ripening (as well on the same fruit):

  • as a matter of fact, decreasing index ranges correspond to increasingly advanced stages of the ripening process, as showed by the differences in ethylene
  • emissions, and by the quality traits of fruit with different DA values.
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  • Manufacturer
    T.R. Turoni Srl