THE BROWN-DUVEL MOISTURE TESTER 
Pvbber stopper 
of three 6-compartment machines, can readily make 200 or more 
tests in a day of eight hours, an average of less than two and one- 
half minutes for each test. The rapidity with which moisture 
determinations can be made by this method makes it especially 
valuable for testing many substances other than grain which have 
a large percentage of 
water, are difficult to MOISTURE: TESTER 
grind, or contain such 
large quantities of vola- 
tile oils that determi- 
nations based upon dif- 
ferences in weight dur- 
ing drying are unre- 
liable. In addition, 
this method obviates 
the necessity of grind- 
ing samples, thus elimi- 
nating the loss of water 
which always accom- 
panies the grinding of 
material of relatively 
high moisture content. 
DESCRIPTION OF THE 
APPARATUS 
The apparatus con- 
sists of a heating 
chamber divided into 
compartments so that a 
number of samples can 
be tested at the same 
time, a tank for cold 
water through which 
the condenser tubes 
pass, and a suitable 
stand for supporting 
the heating chamber 
and cold-water tank, 
together with numer- 
ous accessories, includ- 
ing thermometers, dis 
tillation flasks, and 
graduated measuring 
cylinders. 
Figure 1 shows an 
external view of a 
standard 6-compart- 
ment moisture tester set up ready for use. Figure 2 is a cross section 
through one of the compartments of the tester, showing the position 
of the flask and the flask support within the compartment, the ad- 
justment of the thermometer, and the proper connections of the vari- 
ous parts. 
Sectional view of the officio/ moisture tester, _ 
showing the various parts proper/if connected for i/se. 
Fig. 2. — Cross section of Brown-Duvel moisture tester, 
snowing the various parts properly connected for 
use 
