H68.0.03.6C-01
Operating Manual GMK 100
page 9 of 12
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10
Additional Information to Moisture Measurement
10.1 Moisture u
The displayed material moisture is the most common measuring unit for material moisture
measuring (relating to oven-dry mass)
Water content w is normally used for combustibles (i.e. wood briquette).
Moisture u (relating to oven-dry mass)
The unit is %u (also common: % atro, weight percent).
mass
wet
:
mass of the sample (= total mass = mass
water
+ mass
dry
)
mass
water
: mass of the water contained in the sample
mass
dry
:
mass of the oven-dried sample after (water has been evaporated)
Example: 1kg wet wood that contains 500g water has a moisture u of 100%.
In rare cases Water content w is used
Example:
1kg wet wood that
contains 500g water has
a water content of 50%.
moisture u[%] = ( (mass
wet
- mass
dry
) / mass
dry
) *100
or:
moisture u[%] = (mass
water
/ mass
dry
) *100
water content [%] = ( (mass
wet
- mass
dry
) / mass
wet
) *100
or:
water content [%] = (mass
water
/ mass
wet
) *100
