Gases & Instrumentation - March/April 2008

FEATURES

Considerations in the Selection of
Vapor Delivery Sub-Systems
THOMAS A. KARLICEK & DAVID H. LEE
This article examines the three most common types of vapor delivery sub-systems
and explains their basic theory of operation and typical hardware configuration..

Monitoring Methane in Landfills
TOM PROBST
As methane is generated from a landfill to power five engine-driven generators from
generate electricity, “electronic canaries” monitor the engines and control room.

Miniature Proportional Solenoid Valves: A “Hot” Topic
RICHARD PARKER
An overview of valve choices regarding orifice sizes and flow capability, how to
evaluate and determine valve flow, and design features that promote consistent flow

TDL Technology Promises Improved Process Control

in Gas Plants
SAM MILLER
Ultra-fast and highly accurate, a new Tunable Diode Laser analyzer technology is
replacing conventional sensors at refineries and gas processors, saving on mainte-
nance while providing enhanced control over process integrity

Executive Views: Vacuum Pumps and Their Application An exclusive interview with James Pumfrey in a discussion of the wide array of vacuum pump technology and their application

DEPARTMENTS

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On the Cover: Cover photo courtesy Sensor Electronics:

A sensitive sensor stands guard in the blower/filter cooler room processing methane vacuumed from landfill wells a block away.

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