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SKIPPER 5 MOISTURE METER USER GUIDE
Relationship between Relative Humidity and
Moisture Content
The table below shows the approximate relationship
between the relative humidity and the equilibrium
moisture content of some woods. (These figures are ap-
proximate values at a temperature of 70°F (21°C) and
may vary for different species.).
Relative Humidity / Wood Moisture Content Relationship
Notes on Specific Gravity (S.G.)
The S.G. of Hardwood used in boat building varies be-
tween species and this has an effect on moisture meter
readings. The Skipper 5 calibration is based on Wood
having an SG of 0.60.
Relative Humidity
Wood MC %
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
3 to 5
5 to 6
6 to 8
8 to 9
9 to 11
11 to 13
13 to 15
16 to 19
20 to 22
25+
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