Model 9330 pages

WESTERN RESEARCH

®

PROCESS INSTRUMENTS

Model 933 H2S Analyzer
Introduction
The measurement of hydrogen sulfide (H2S) is a critical
quality control parameter in natural gas and other process
industries. Conventional detection principles, such as
lead acetate tape devices, require frequent maintenance
intervention and disposal of potentially hazardous
materials (used cassette tapes). Additional problems
associated with lead acetate paper tape analyzers are:
the inherent difficulty handling H2S overload conditions
during process or pipeline upsets, sensitivity to changes in
ambient conditions and slow response speed.

The Solution
The AMETEK Western Research® Model 933 is a unique
UV-based photometric analyzer system for H2S analysis
when present in concentrations below 100 ppm in
natural gas and other applications. The Model 933 uses
AMETEK Western Research’s proprietary auto carrier
chromatography sampling technique, combined with the
exceptionally high resolution, multi-wavelength AMETEK
900 Series UV optical bench to provide an accurate,
interference free measurement of H2S. The result is a
unique low level H2S analyzer that is designed to operate
unattended for six to nine months, or longer.

Class I, Div 1 and ATEX Zone 1 Version

Benefits
►t t xtended, unattended operation for 6 – 9 months or longer
E
►t t elf-recovery after high concentration H2S events
S
►t t ast response time to increasing or decreasing H2S concentrations
F
►t t oncentration measurements of COS and methyl mercaptan (MeSH) optionally available
C
►t t o consumables, reagents, or disposables other than zero gas
N

Applications
►t t as sweetening
G
►t t ipeline quality / custody transfer
P
►t t ynthetic natural gas (SNG)
S
►t t lending stations
B
►t CO2 purity
►t Biogas

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