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With
its patented Vanishing Chamber® collection head, the Welker
Composite Gas Sampler, is an extremely accurate sampling device
for determining the quality of a flowing stream. It purges itself
100% prior to sample collection and samples are taken at full
pipeline pressure. The sampler interfaces with any metering
system, is self-contained, intrinsically safe and battery powered,
yet sells for only one-fourth the cost of an on-line analyzer.
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