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Sierra Monitor Corporation 1991 Tarob Court Milpitas, CA 95035 USA (408) 262-6611 (800) 727-4377 Fax: (408) 262-9042
The Model 4400 In-Stream Hydrogen Sulfide Analyzer
is used to continuously verify the H
2
S content of a natu-
ral gas sample for the presence of 0-100 ppm levels of
Hydrogen Sulfide. This system is used to insure that
H
2
S levels in natural gas collection lines remains at ac-
ceptable levels to help guard against the corrosive ef-
fects of H
2
S on compressors, pipelines and process
equipment. It is intended for continuous monitoring prior
to the addition of odorants to the gas.
The 4400-10 receives a low pressure natural gas slip-
stream sample. A flow controller in the system delivers
a constant flow to the gas sensor and allows for easy
calibration and maintenance. An in-line coalescing fil-
ter protects the system from sample contaminants.
A 4-20 mA linear signal proportional to sample concen-
tration is provided from the sensor assembly. This sig-
nal can interface with a Sierra Monitor Model 4107-99
Transmitter/Display, a single channel controller, the
Sentry multi-channel controller or most industry stan-
dard controllers or PLCs.
The Model 4107-99 Transmitter/Display option can ac-
cept the 4-20 mA signal from the Model 4400-10 and
provide digital display of the H
2
S concentration, dual
concentration alarm contacts, 4-20 mA output and se-
rial MODBUS communication. The Model 4107-99 can
be mounted directly to the Model 4400 H
2
S Analyzer of
at a remote location. The Model 4107-99 is in an ex-
plosion proof enclosure.
Model 4400
In-Stream Hydrogen Sulfide Analyzer
The Sierra Monitor Model 4400 provides the user with
a low-cost, easy-to-use solution to effective monitoring
of natural gas streams. This system accurately mea-
sures H
2
S concentration in the 0-100 ppm range. Fast
response of 90% of step change within 30 seconds
enables the user to respond quickly to changes in natural
gas supply conditions to prevent product contamina-
tion.
There is minimal maintenance with the Model 4400 with
no tapes to replace, no conditioning solutions, no me-
chanical stream blenders to calibrate. Calibration is
easy with external application of span gas and simple
one person adjustments. Calibration and swapping of
the gas sensor is a quick and simple operation per-
formed every two weeks.
Features Benefits
n No tapes to replace or conditioning solutions Minimal maintenance, no hazardous material to
dispose
n Fast response Prevention of product contamination
n Simple one-person adjustments Easy calibration, minimal service time