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Excellent tasty fruit
 
To obtain the maximum potential life it is important that fruit is cooled down as soon as possible after harvest. Delay in cooling allows the ripening process to continue, and for some short-life fruit, like apricots, the fruit may quickly become too mature.
 
The problem
The lower temperature limit for all fresh produce is its freezing point. Once the freezing point is reached, water from the cells is frozen in the spaces between the cells, and the cells themselves are damaged.
 
The challenge
To maintain the correct temperature and humidity levels in the refrigeration places to:
  • To prolong the life of fruit
  • Secure product quality
  • Prevent spoiling of food and cost.
What to check
Recommended air storage temperature and humidity conditions of various fruits and the impact on their storage life are given in the below table for some fruits.
Fruit
Apples
Apricots
Bananas
Pineapples
Freezing temp. °C
 -1,5
 -1
 -0,8
-1,1
Best storage temp. °C
0
0
12,5
15-20
Best storage humidity
% RH
95
95
90
90
Approx.
storage life
Weeks
12
2
2-3
1-4
 
Solution
Installing these verification systems used to be very costly since much cabling was required. WiSensys uses wireless technology in combination with advanced measurement capabilities making real time monitoring of temperature and humidity possible in cold storage places with a minimum of installation cost.
         
The WiSensys system is also used to directly inform the responsible quality manager in case temperature or humidity level is above or below a predefined level, to prevent cold storage problems. This can be done via an alarm on mobile phones or email.
 
Fruit storage customer
Below a fruit customer who has 6 cold storage rooms and uses a combination of temperature and humidity measurements.
The base station and sensor positions are shown in the figure below.
 
Figure 1: Sensor and base station position
 
Customer feedback
Before problems arise we are informed and can take preventive actions, saving cost.
We can demonstrate that the fruit has been stored under the right conditions in our storage facility.
The WiSensys installation went very easy and quickly.

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