Constant temperature and high humidity levels are needed to slow the metabolic activity and decomposition of fruit in storage to keep fruit fresh throughout the year. Precise monitoring and control of humidity, temperature, oxygen, and carbon dioxide levels plays a key role. The EE33 sensor accurately measures humidity and temperature even in high humidity environments like fruit storage warehouses, while the EE82 and EE871 sensors monitor and maintain the optimal carbon dioxide levels.

1. YOUR PARTNER IN SENSOR TECHNOLOGY
R
Ges.m.b.H.
CLIMATE CONTROL FOR FRUIT STORAGE
It's well known that you can't compare apples with oranges. This also
applies to the storage of various kinds of fruit. Very stringent require-ments
are placed on storage in order to ensure that fresh fruit is avail-able
throughout the year.
For the correct storage of fruit it is important that the metabolic activity of the fruit
and the decomposition of valuable constituents is greatly slowed down by low tem-peratures.
A constantly high humidity prevents the fruit from drying out.
The precise measurement and control of humidity and temperature plays a central
role in both traditional cold storage as well as in modern CA (Controlled Atmos-phere)
• Application conditions
Measurement range: 0...100 %rel. hum.. / -40...60°C / 0...10.000 ppm
Output: 4 – 20 mA or 0 - 10 V
Conditions of use: Temperature -2...+6 °C
Humidity: constant > 92 % rel. hum.
CO2: up to 10,000 ppm
• E+E Products
EE33 Model J or K
High accuracy measurement of relative humidity, dewpoint
and temperature close to the condensation point.
dioxide content is also monitored and
maintained at the required level with the
very latest measurement technology.
CA fruit storage
Humidity and temperature measure-ment:
The EE33 is ideal for the precise meas-urement
of temperature and humidity.
Because of the constantly high humidity,
model "J" or "K" is used. Double sensor
heating (where both the sensor tube and
the humidity sensor are heated) reliably
prevents condensation and ensures
stable measurement results over long
periods.
CO2 measurement:
CO2 monitoring is performed with the
CO2 measuring transducers EE82 or
EE871. The patented auto-calibrate
function compensates for any aging ef-fects
(even if there is no fresh air supply)
and ensures excellent long-term stability.
EE82 and EE871
CO2 measuring devices for sophisticated applications.
warehouses.
In cold storage, the temperature is kept constant at between -1 °C to +6 °C depend-ing
on the type of fruit. Additional humidifying systems ensure a stable humidity of
between 92 and 98% relative humidity.
In addition to humidity and temperature, in a CA warehouse the oxygen and carbon
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