AGRETO PFM II
© AGRETO electronics GmbH
page:14
8
Factors influencing measurements
8.1
Bale density
Hay and straw bales are of different density. In practice, the bale density can
usually not be determined. In addition, the density within a bale can be very
different, intentionally or unintentionally.
The calibration of the AGRETO PFM II is designed for an average bale density.
In bales with higher density, a higher humidity level will tend to appear. At lower
density bales rather a lower value. This fact is advantageous in practice, in
many cases, as with more compressed bales increased sensitivity is advisable
with respect to quality and storability.
8.2
Material
A hay or straw bale consists of different plant parts, which dry unevenly. Also,
the material in the bale is not always stored uniformly. The leaf / stem ratio is not
always the same throughout the bales.
Accordingly, the moisture within the bale is different. Bales with higher humidity
typically have at higher moisture differences within the bale. With increasing
drying, the differences are less.
The AGRETO PFM II measures the moisture only in the area of the material that
sweeps directly in the area of the sensor plate.
