MIL-HDBK-1005/16
Table 19 (Continued)
Advantages and Disadvantages of Manual and
Automatic Sampling
Type
Advantages
Disadvantages
Minimal labor requirement Inflexibility
for sampling
Has capability to collect
Sample contamination
multiple bottle samples
potential
for visual estimate of
Subject to damage by
variability and analysis
vandals
of individual bottles
There are usually five interrelated subsystems in the
design of an automatic sampler. These subsystems and the
criteria for selecting them are described briefly below.
11.6.2.1 Sample Intake Subsystem. The success of an automatic
sampler in gathering a representative sample depends on sampling
site conditions and the design of the sample intake subsystem.
The reliability of a sample intake subsystem is measured in terms
of the following factors:
a)
Freedom from plugging or clogging
b)
Nonvulnerability to physical damage
c)
Minimum obstruction to flow
d)
Capability to draw a representative sample
e)
Multiple intakes
f)
Rigid intake tubing or facility to secure or
anchor the intake tubing; avoidance of sharp bends, twists, or
kinks to prevent clogging of intake line
g)
Compatible materials
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