H2S & Total Sulfur

Analyzers

Tape Transport System801 and 902 analyzers use a common tape chassis unit. It is designed to handle up to350 feet of lead acetate tape. Thestepper motor advances the tapeon microprocessor command. Inthe explosion proof models, themotor is located in an explosionproof box, and connected via ashaft through an explosion proofcoupler. The shaft is fitted with auniversal coupler to reducealignment related problems. In thegeneral purpose unit, the motor ismounted inside the chassis.

GalvanicAppliedSciences Inc. Galvanic is a technologycompany who manufactureslead acetate tape and sulfurchemiluminescence analyzers.In addition we produce BTU,TCD chromatograph systemsand flow automation products.

OurCompany...provides solutions throughinnovative equipment anddesign. We are committed tocustomer satisfaction and fullfield service.

H2S and Total Sulfur

Using Lead AcetateThe lead acetate tape method for the detection of hydrogen sulfide (H

2S) in gaseous

streams is based on the established principle that H2S reacts specifically with lead acetate

to form a lead sulfide brown stain. The concentration of H2S is directly proportional to the

rate of change of staining on the lead acetate tape. This principle is the basis for a number

of ASTM methods. It is by far the most reliable and simple way to measure H2S in process.

H2S + Pb ➔ PbS + H

2O

The analyzer moves the treated paper tape one section at a time. Depending on the

sample concentration, the tape will begin to darken at a rate proportional to the

concentration of H2S in the sample stream. The analyzer exposes a fresh section of tape to

the sample inside the sample chamber every 3-4 minutes.

GASI Analyzers are designed with the following in mind:• Low maintenance• Extended tape life• Fast speed of response• Low power consumption• Optional total sulfur measurement

The lead acetate series of analyzers

are third generation systems

designed to meet

increasing demands for

low level measurement in

processes and laboratories.

Sample Chamber Assembly The Sample Chamberhas a removableaperture that can bechanged for variousgas concentrations.Typically, the higher thegas concentration to bemeasured, thesmaller the aperture.This aperture restrictsthe amount of H

2S

reacting on thetape. The photodetector is a siliconphoto diode thatconverts the darkness to anelectric signal amplified at the sensorboard to a 0 to 250 millivolt signal. This signal is scaled at themicroprocessor. The system uses a single light emitting diode(red) as a light source to illuminate the tape.

SAMPLEINSAMPLE

OUT

SENSORBLOCK

SENSOR ASSY.COMPRESSIONBLOCKS

ELECTRONICSCONNECTOR FROM801/902 ANALYZER

Sample Chamber / Sensor Block Assembly

CalibrationThe system is self zeroing at every tape advance, therefore calibration is only required every 3-4 months.The units can be calibrated manually or automatically with an optional “autocal” solenoid.

Four types of calibration procedures are available:

1. Analyzer Zero: potentiometer adjusting of the sensor balance (self adjusting on 902 series) note: the analyzer reading iszeroed every cycle (3-4 min) since the measurement is based on rate of change.

2. Manual Span Calibration: applying a known gas reference to the analyzer and manually adjusting the gain factor.

3. Manual Calibration with Auto Gain Adjustments: applying a known reference to the analyzer. The analyzer then calculatesthe gain factor internally.

4. Auto Calibration: a known gas sample is continuously connected to the calibration inlet port and measured on a userprogrammed time period. The analyzer automatically calibrates to the known sample.

H2S or COS in a N

2background provides the most stable and convenient calibration source. It is normally recommended to

calibrate the analyzer at 60-80% of scale or close to the most critical value such as the alarm limit. Disposable and refillablebottles are available from most laboratory gas suppliers.

• The Optical System is composed of asolid state light source (LED) and siliconphoto-diode detectors.

• The software performs diagnostic checkson startup and during operation.

• Simple operation allows non-technicalpersonnel to operate the 801.

• The tape drive assembly uses a digitally controlled stepper motor directlydriving the tape, eliminating complexdrive systems.

• Low power electronics can operate frombatteries or solar power.

• Automatic calibration is optional.

There are 5 models to choose from, 801XP, 801D2, 801W, 801 Lab and 801P portable. Allof these units use the same electronics platform.

The 801 series are low cost, microprocessor based H2S lead acetate tape analyzers. The

optics, mechanical system, digital electronics and software all combine to fully utilize the inherentstrengths of the lead acetate methodology.

• Selective to H2S only without interferences of any kind

• Sensitive to parts per billion (ppb) or parts per million (ppm)

The 801 was designed for high reliability, low maintenance operation.

801 SeriesH

2S

Analyzers

Measurements• Natural gas• LPGs• Refinery gas• Chemical feedstock• Emission monitoring

Applications• Refinery• Gas processing facilities• Fertilizer plants

Features• 30 to 60 day tape life• Simplified tape drive• Low power consumption

Benefits• High reliability• Low maintenance

operation• Low cost

Model 801XP

Model 801D2

Model801W H

2S

Analyzer

Measurements• Natural gas• Fuel gas• Sewage

Features• 300 foot tape• Nema / wall mount

The 801W is a wall mounted unit in a Nema 4X enclosure suitable for DIV 2 areas.It has a front mounted tape drive assembly.

It is a low cost, microprocessor based H2S analyzer using the principle of lead acetate

tape. This time proven method is superior to other technologies for ppm level H2S

measurement in natural gas or LPG. The optics, mechanical system, digital electronics andsoftware all combine to fully utilize the inherent strengths of the lead acetate methodology.

• Selective to H2S only without interferences of any kind

• Sensitive to parts per billion (ppb) or parts per million (ppm)

The 801W was designed for high reliability, low maintenance operation.

• The optical system is composed of asolid state light source (LED) and siliconphoto-diode detectors.

• The software performs diagnosticchecks on startup and during operation.

• The tape drive assembly uses a digitallycontrolled stepper motor directly drivingthe tape, eliminating complex drivesystems.

• Automatic compensation eliminateszero drift.

• Simple operation allows non-technicalpersonnel to operate the 801W.

• Low power electronics can operatefrom batteries or solar power.

Handheld keypad for operator input such as calibration, configuration,

or system monitoring.

Model801PPortable H

2S

Analyzer

• The Optical System is composed of asolid state light source (LED) and siliconphoto-diode detectors.

• The software performs diagnosticchecks on startup and duringoperation.

• The tape drive assembly uses adigitally controlled stepper motordirectly driving the tape, eliminating theneed for complex drive systems.

• Simple operation allows non-technicalpersonnel to operate the 801Pportable.

• Spill proof humidifier allows for easytransportation without draining aceticacid.

• Rugged construction allows the 801P portable to operate in the field.

• Low power electronics can operatefrom the internal batteries, 12–32 VDCpower or AC adapter.

• Ideal for spot checks on productionfacilities.

The 801P portable is a low cost microprocessor based H2S Analyzer using the principle of

lead acetate tape. The 801P portable is designed for temporary service. It has a 100 foottape and internal batteries; 12-32 VDC power or AC adapter.

• Selective to H2S only without interferences of any kind

• Sensitive to parts per billion (ppb) or parts per million (ppm)

The 801P portable was designed for high reliability, low maintenance operation.

Measurements• Natural gas• LPGs• Refinery gas• Chemical feedstock• Emission monitoring

Applications• Refinery• Gas processing facilities• Fertilizer plants

Features• Durable construction• Spill proof humidifier• A solid state light source

and silicon photo-diodedetectors

Benefits• Low cost• Reliable• Accurate

The 801 Lab is a microprocessor based H

2S analyzer

based on the principle of lead acetate tape. This time proven method is superior to other technologies for ppm level H

2S

measurement in natural gas or LPGs. The optics, mechanical system, digital electronics and software all combine to fully utilize the inherent strengths of lead acetate methodology.

• Selective to H2S only without interferences of any kind

• Sensitive to parts per billion (ppb) or parts per million (ppm)

The 801Lab was designed for high reliability, low maintenance operation.

Total Sulfur OptionThe Optional Total Sulfur System measures totalsulfur by hydrogenation, allowing a standardGalvanic Applied Sciences Model 801Lab H

2S

Analyzer to measure Total Sulfur concentration.

The sample is mixed with a hydrogen stream. The sample and hydrogen are heatedtogether at approximately 900°C. At this temperature in the presence of hydrogen all sulfurcompounds will be converted to H

2S. Also, hydrocarbons heavier than methane will be

cracked to methane.

Examples of the sulfur reaction are:

COS + 4H2

➔ H2S + C

1H

4+ H

2O

900°C

Carbonyl Sulfide(C

2H

5)

2S + 4H

2➔ H

2S + 4C1H4

900°C

Ethyl Sulfide(CH

3)

2S + 2H

2➔ H

2S + 2C

1H

4900°C

Methyl Sulfide: Example of Cracking

C4H

10+ 2H

2➔ 4C

1H

4900°C

Model801 LabH

2S / Total

Sulfur

Measurements• Natural gas• LPGs• Refinery gas• Chemical feedstock• Emission monitoring

Applications• Refinery• Gas processing facilities• Fertilizer plants

Features• 30 to 60 day tape life• Simplified tape drive• Low power consumption

Benefits• High reliability• Low maintenance

operation• Low cost

• The Optical System is composed of a solidstate light source (LED) and silicon photo-diode detectors.

• The software performs diagnostic checkson startup and during operation.

• The tape drive assembly uses a digitallycontrolled stepper motor directly driving thetape, eliminating the need for complexdrive systems.

• Automatic compensation eliminates zerodrift.

• Simple operation allows non-technicalpersonnel to operate the 801.

• Low power electronics can operate fromthe internal batteries, 12–32 VDC poweror AC adapter.

• Ideal for spot checks on productionfacilities.

The 902 is the most advanced tape analyzer on the market offering:• Windows based GUI software for configuration/monitoring

• Modem connection option

• Modbus Communication RS232 and RS432

• 8 stream capability with dual mode (H2S & Total Sulfur)

• Dual range with automatic switchover

• Up to 16 analog outputs available with optional serial card

• Automatic calibration feature

• Automatic reference gas feature

• Extended memory for event, maximum, and hourly, daily average archives

The model 902 H2S Analyzer

from Galvanic Applied SciencesInc. is designed to measure H

2S

in gaseous streams. The 902detection system is based on thelead acetate tape method. Withthe optional total sulfur furnace,the unit can measure alternatereadings between H

2S and total

sulfur. The 902 is capable ofmeasuring up to eight streams.

The 902 is designed forsimplicity of operation, withadvanced features. Dual 4-20milliamp outputs are standard.An optional Modbuscommunications cardis available.

Calibration is automatic* andcan be initiated remotely, at thekeypad or at timed intervals. Theunit, when fitted with the TotalSulfur option, allows Total Sulfurand H

2S to be measured with

one analyzer. The system can becalibrated with a bottledstandard containing H

2S in N

2.

*Galvanic Applied Sciences can add a solenoid to automatically calibrate the 902analyzer at a specified interval

Model902H

2S / Total

SulfurAnalyzer

Measurements• Natural gas• LPGs• Refinery gas• Chemical feedstock• Chemical manufacturing • Emission monitoring

Applications• Refinery• Gas processing facilities• Fertilizer plants

Features• Solid state photo diode

detector and light source• Automatic sensor balance• Simplified direct tape drive

Benefits• Simple operation /

low maintenance• Fast response• Low cost• Accuracy

Pr. Relief

Ven

t

Sample In

Cal In

H2 In

Total Sulfur

SoftwareA Windows based GUIcomplete with help files isstandard with our 902analyzer. This allows thefull use of datamanipulation and reportgeneration functions viathe modbus port.

The package provideseasy configuration vialaptop and downloadingcapability, as well as realtime monitoring.

The system can beaccessed via an RS232 modem.

Total SulfurOptionThe addition of a hydrogenation reactionfurnace allows a standard Galvanic AppliedSciences Model 902 H

2S Analyzer to measure

Total Sulfur concentration.

The sample is mixed with a hydrogen streamand heated to approximately 900°C. At thistemperature in the presence of hydrogen allsulfur compounds will be converted to H

2S. Also,

any hydrocarbon heavier than methane will becracked to form methane.

Examples of the sulfur reaction are:

COS + 4H2

➔ H2S + C

1H

4+ H

2O

900°C

Carbonyl Sulfide(C

2H

5)

2S + 4H

2➔ H

2S + 4C1H4

900°C

Ethyl Sulfide(CH

3)

2S + 2H

2➔ H

2S + 2C

1H

4900°C

Methyl Sulfide: Example of Cracking

C4H

10+ 2H

2➔ 4C

1H

4900°C

RangeExtensionSystems

Our lead acetate tape analyzers are usually limited to a maximum 50 ppm H2S

concentration at around 100 cc/min sample flow. Galvanic Applied Sciences Inc.offers three types of sample dilution schemes to allow analyzers to measure higherconcentrations up to 100% H

2S. These dilution systems can be mounted at the

analyzer or near the sample point to avoid bringing high concentration H2S or

other sulfurs near the analyzer.

Permeable Membrane DilutionA permeation dilution device (PDD) consists of two chambers formed within a cylindricalhousing by a permeable membrane. The membrane blocks particulates and mist droplets,while allowing only gas or volatile components to transfer into a clean dry carrier gas orliquid sweeping the opposite side of themembrane. Compounds such as H

2S permeate

the membrane at a known rate, proportional toconcentration over a given area. The size of themembrane can be designed to provide a ratiobetween the input and output concentration aslow as 10:1 and up to 10,000:1. These systemshave proven to be very reliable and stable overtime with very little temperature dependency.

Injection Valve DilutionThe injection valve dilution GASI uses employs a chromatograph valve to inject a smallamount of sample at preset intervals into a clean dry carrier gas. The unit is a pure volumedevice and the dilution ratio can be adjusted over a wide range by changing acombination of injection time and injection volume. Inorder to provide a smooth reading, the injection timeshould be 30-60 sec. The injection volumes can varyfrom .5 microliter to .5 cc. The dilution factor is acalculation of volume of injection multiplied by thenumber per minute divided by the dilutant flow(typically 150 cc/minute).

This dilution method can be used in front of the total sulfur analyzer for H2S. Permeable

membrane devices must be installed after the total sulfur oven to function properly andindependently.

Flow Meter DilutionFlow meter dilution uses the combinedflow from two flow meters for sampleand carrier to the analyzer. A dilutionratio is proportional to the flow in eachmeter. A dilution ratio greater than10:1 is not recommended.

Custom SystemsGASI can supply custom designs and field commissioning for their systems. Completeanalyzer shelters, data acquisition, and sample conditioning panels are part of a totalsolution integration to the user.

Vent

Actuation

To Analyzer

DeenergizedEnergized

Sample In

Carrier Gas

PL

PL

Dilution Gas N2

Sample

Calibration

BV

F

FM

Vent

Purge

DIL

ED

902Analyzer

PR

PR

PI

PI

3V

NV

Legend:3V - 3-Way ValveBV - Block ValveDIL - Dilution CellED - EductorF- FilterFM- Flow MeterNV- Needle ValvePI- Pressure IndicatorPR- Pressure Regulator

Instr Air

F

HeadlineFilter/RegSet @ 25 psig

Flow Meter0-3080cc/min

Flow Meter0-51cc/min

Typical801 or 902Analyzer

Optional

Vent

Optional0-2400cc/min

GO PR-10-25 psig Sample In

LeadAcetateTape

Our controlled plant environment ensures top quality in our lead acetatetapes.

Our automated process and constant quality checks ensure consistentproduct. All our tapes are cleaned after treatment to minimize problemscaused by paper dust. We can customize our tapes up to threehundred and fifty feet. Analyzers run cleaner and smoother with ourtape.

• No interferences • Colourless reactants • Sensitivity to ppb • Linear response

Standard lengths are Part #100 ft (standard core) CO0081100 ft (801P small core) CO1704250 ft CO1460300 ft CO0329350 ft CO1693• H

2S specific

• No interferences• Colourless reactants• Sensitivity in ppb• Linear response

• Quality control• Low cost• Customized length

Specifications

(1) Note: Require range extension sample system *Canadian Standards Association

902 801

Range 0-100 ppb to 0-50 ppm 0-100 ppb to 0-50 ppm50 pm to 100% (1) 50 pm to 100% (1)

Streams 1 Standard Plus Calibration 1 Standard Plus CalibrationUp to 8 Optional

Total Sulfur Optional Optional

Electrical Class 1, Div II, Standard Class 1, Div IINote: All systems are CSA* Group B,C,D, Optional: Group B,C,Dcertified or special accepted Class I, Div I, Group. C&D Standard

Optional Class 1, Div I, Group C,DClass 1, Div I, Group B Optional

Linearity ±2% of full scale ±2% of full scale

Repeatability ±2% of full scale ±2% of full scale

Ambient 40-120°F 40-120°F

Zero Drift None None

Response Time 3 minutes to 90% 3 minutes to 90%10 second response to 10 second response toover range over range

Tape Life 4-8 weeks depending 4-8 weeks dependingon application on application

Power Consumption 10 Watts @ 24 VDC or 120 VAC 60 Hz 3 Watts

Outputs 2 isolated 4–20 ma scaled 4-20 milliamp linearto range High-High alarm relay6 relay contact (SPDT High alarm relay5 amps, 250 VAC max) Trouble relay1 Solenoid driver (120 VAC Solenoid drivermax @ 2 amps) CalibrationOptional: 1 Modbus RS232 communication card

Electronic Hardware 87 C530 Microprocessor @ 24 MHz 16 Bit A/D complete with low pass and 16 bit A/D slew rate filters128 KB RAM 64K Eprom64K ROM 32K, 8 KB E2PROM RAM16 Bit Analog Out 1-12 Bit Analog Out (4-20)(4-20 ma) Electronic calibration every cycleHandheld keypad interface Handheld keypad interface

Contact Inputs Remote initiation of Remote initiation ofcalibration • Over fail calibration • Over failLow pressure • Low tape Low pressure • Low tape

Dimensions 28”Hx16”Wx16”D 28”Hx16”Wx16”D

Weight 40 pounds (XP version 80 lbs) 30 lbs pounds (XP version 40 lbs)

(1) Note: Require range extension sample system *Canadian Standards Association

Specifications801Lab 801P 801W

0-100 ppb to 0-50 ppm 0-100 ppb to 0-50 ppm 0-100 ppb to 0-50 ppm Range50 pm to 100% (1) 50 pm to 100% (1) 50 pm to 100% (1)

1 Standard Plus Calibration 1 Standard Plus Calibration 1 Standard Plus Calibration Streams

Optional N/A N/A Total Sulfur

General Purpose General Purpose Class 1, Div II ElectricalGroup B, C,D Note: All systems are CSA*

certified or special accepted

±2% of full scale ±2% of full scale ±2% of full scale Linearity

±2% of full scale ±2% of full scale ±2% of full scale Repeatability

40-120°F 40-120°F 40-120°F Ambient

None None None Zero Drift

3 minutes to 90% 3 minutes to 90% 3 minutes to 90% Response Time10 second response to 10 second response to 10 second response toover range over range over range

4-8 weeks depending 2 weeks depending 4-8 weeks depending Tape Lifeon application on application on application

3 Watts 3 Watts 3 Watts Power Consumption

4-20 milliamp linear 4-20 milliamp linear 4-20 milliamp linear OutputsHigh-High alarm relay High-High alarm relay High-High alarm relayHigh alarm relay High alarm relay High alarm relayTrouble relay Trouble relay Trouble relaySolenoid driver Solenoid driver Solenoid driverCalibration Calibration Calibration

64K Eprom 64K Eprom 64K Eprom Electronic Hardware32K, 8 KB E2PROM RAM 32K, 8 KB E2PROM RAM 32K, 8 KB E2PROM RAM1-12 Bit Analog Out (4-20) 1-12 Bit Analog Out (4-20) 1-12 Bit Analog Out (4-20)

Remote initiation of Remote initiation of Remote initiation of Contact Inputscalibration • Over fail calibration • Over fail calibration • Over failLow pressure • Low tape Low pressure • Low tape Low pressure • Low tape

20.5”Wx12”Hx10.5”D 16”Hx16”Wx8”D 16”Hx16”Wx8”D Dimensions

20 pounds 16 pounds 15 pounds Weight

24.7"

12.4" 6.3"

7.0"24.7"

23.9"

12.4" 11.2"

23.9"

801XP

801GP801W

12.5"

14.0"

10.5" 6.0"

12.5"

1.3"

801P

11.2"

11.8"

20.5" 12.6"

FILL TO LINE WITH 5 PERCENT

BUBBLER HUMIDIFIER

ACETIC ACID & DIST. WATER

801Lab

16.0"

18.5"

8.4" 12.5"

16.0"

18.5"

Sample In

Vent

33.0"

36.0"

40.0"

27.0"30.0"

9.0" 6.0"

15.0"

36.0"

46.7"

PI.

PR.

Vent

H2 In

PressureRelief

Cal In

Sample In

12.0"

12.4"

9.8"

32.4"

12.4" 13.7"

902GP 902XP

902TS

Head Office: Bay 6, 6325 - 12th Street S.E.

Calgary, Alberta, Canada T2H 2K1

Telephone: 403-252-8470

Fax: 403-255-6287

Houston Office: 13211K Windfern Boulevard

Houston, Texas, U.S.A. 77064

Telephone: 281 477-9002

Fax: 281-477-9004

www:galvanic.ab.ca

Email: info@galvanic.ab.ca

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