Sierra Monitor Corporation 4400 User Manual

In-Stream Hydrogen Sulfide Analyzer

The Model 4400 In-Stream Hydrogen Sulfide Analyzer
is used to continuously verify the H2S content of a natu­ral gas sample for the presence of 0-100 ppm levels of
Hydrogen Sulfide. This system is used to insure that
H2S levels in natural gas collection lines remains at ac­ceptable levels to help guard against the corrosive ef­fects of H2S 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 slip­stream 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 fil­ter protects the system from sample contaminants.

A 4-20 mA linear signal proportional to sample concen­tration is provided from the sensor assembly. This sig­nal can interface with a Sierra Monitor Model 4107-99
Transmitter/Display, a single channel controller, the
Sentry multi-channel controller or most industry stan­dard controllers or PLCs.

Model 4400

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 mea­sures H2S 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 contamina­tion.

The Model 4107-99 Transmitter/Display option can ac­cept the 4-20 mA signal from the Model 4400-10 and
provide digital display of the H2S concentration, dual
concentration alarm contacts, 4-20 mA output and se­rial MODBUS communication. The Model 4107-99 can
be mounted directly to the Model 4400 H2S Analyzer of
at a remote location. The Model 4107-99 is in an ex­plosion proof enclosure.

There is minimal maintenance with the Model 4400 with
no tapes to replace, no conditioning solutions, no me­chanical 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 per­formed 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

Sierra Monitor Corporation 1991 Tarob Court Milpitas, CA 95035 USA [phone] [phone] Fax: [phone]

Specifications:

Model 4400

In-Stream Hydrogen Sulfide Analyzer

4400 In-Stream Analyzer

Power: 24VDC
Output: 4-20 mA = 0-100 ppm H

Environmental:

Temperature Range

Operating:: -20 to 50
Storage: -40 to 50oC (-40 to 122oF)

Humidity: 0-95% RH (non-condensing)

Sensor:

Range: 0-100 ppm Hydrogen Sulfide
Type: Electrochemical
Life: Approximately 1 year in cycled

service

Response: <30 seconds to 90% FS

Mechanical:

Area Classification: Div 1, Class 1, Groups B,C,D
Enclosure: NEMA-1 with removable cover panel
Mounting: installs on 9” x 7” “H” Frame
Connections: 3 position terminal strip with

separate conduit

Dimensions (WxHxD): 9.0 x 11.0 x 4.0 inches

(22.9 x 27.9 x 10.2 cm)

Weight: 5 lbs (2.2 Kg)

Warranty: 2 years as non non-consumable items

o

C (-4 to 122oF)

S

2

4107-99 Transmitter/Display

Power: 24VDC

Operating
Temperature Range: 14 to 140

Display: 2-line, 32 character alphanumeric

backlit LCD

Alarms: Dual level alarms plus fault alarm
Alarm Contacts: Dry contacts from each alarm rated to

switch at least 1 amp @ 30 volts or

0.5 amp @ 125 volts for resistive
loads

Serial Output: Bi-directional RS-232 and RS-485

MODBUS

Mechanical:

Housing: Explosion proof (NEMA 7/NEMA 4X)

(Div. 1, Class 1, Groups B,C,D

Class 2, Groups E,F,G)
Mounting: 3/4" NPT
Dimensions( WxHxD): 5.3 x 5.7 x 5.7 inches

(13.5 x 14.5 x 14.5 cm)
Weight: 6.0 lbs (3.2 Kg)

o

C (-10 to 60oF)



protocol

Ordering Information:

4400-10 In-Stream Hydrogen Sulfide Monitor
4107-99 Single Point Explosion Proof Transmitter/Display
SPM27064 Maintenance Kit (consists of 1 spare sensor assembly & 2 flow harnesses)

Model 4400-10 with 4107-99 Transmitter/Display

Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 [phone] 800-727-4377 FAX: [phone]

Visit our Web site at: www.sierramonitor.com E-Mail: [e-mail]

© 1997 by Sierra Monitor Corporation