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Brand: Galvanic
ProTech903™ Tape-Based H2S/Total Sulfur Analyzer
Description
Overview
The ProTech903™ is Galvanic’s long-established leader in tape-based H2S and Total Sulfur analyzers, continuing to innovate with cost-effective systems that optimize performance in the harshest monitoring environments. Galvanic’s ProTech903™ gas analyzers deliver fast, extremely sensitive, and accurate analysis of H2S and total sulfur, arsine, phosphine, or phosgene, depending on which analyzer configuration is selected.
With engineering support in Muscat, Seven Star LLC offers the ProTech903™ to natural gas sweetening plants, custody transfer stations, and flare-gas monitoring programs across the Sultanate of Oman, Muscat, and the wider GCC. The ProTech903™ family of tape-based analyzers can improve both quality and economics, with low detection limits that outperform other analytical methods in the critical 0 to 15 ppmv application range.
Measurement Principle
The ProTech903™ uses the proven lead-acetate tape method, in which the tape begins 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 approximately every 3-4 minutes, with the system self-zeroing at every tape advance so that calibration is required only every 3-4 months.
A sensor block measures the intensity of light reflected off the lead-acetate tape: a light-emitting diode emits a beam of red light that passes through the rear window and aperture strip, reflects off the tape, and returns to a photodiode detector. As the stain on the tape darkens with H2S exposure, the reduction in reflected light intensity is directly proportional to the H2S concentration in the sample. The analyzer achieves accuracy and repeatability of ±2% F.S. for ranges of 1 to 50 ppm, with a response time of 30 seconds to alarm.
Engineering Design of the ProTech903™
The ProTech903™ is available in H2S-only and Total Sulfur (TS) configurations, with the Total Sulfur option using a 3-way solenoid valve to direct gas either into a total sulfur conversion furnace or bypass it, allowing the analyzer to alternately measure H2S and total sulfur in different ranges. A hand-held keypad provides user interface for system operation, while a PC-based graphical user interface (GUI) offers an alternative for viewing and configuring the analyzer remotely.
The analyzer is available in Weatherproof (W), Division 1 (D1), and Division 2 (D2) enclosure configurations, with dimensions and weight varying by option—H2S-only units range from 20.4 kg (Div 2) to 27.2 kg (Div 1), while Total Sulfur units range from 29.4 kg (Div 2) to 36.3 kg (Div 1). Communication includes Modbus RS232, RS485, optional TCP/IP, Ethernet, and USB, with 6 SPDT relays and 6 analog outputs available for control system integration.
Key Features
The ProTech903™ combines proven lead-acetate tape technology with configurable multi-analyte capability. Core capabilities include:
- Fast, extremely sensitive, and accurate analysis of H2S, Total Sulfur, arsine, phosphine, or phosgene.
- Low detection limits outperforming other analytical methods in the 0-15 ppmv application range.
- Self-zeroing at every tape advance, requiring calibration only every 3-4 months.
- Interference-free and not matrix dependent measurement.
- Easy remote-access capability via PC-based GUI or hand-held keypad.
- Multi-stream capability with solar power option (H2S/TS analyzer, excluding Total Sulfur configuration).
- Low total cost of ownership among tape-based analyzers on the market.
- CSA Class 1 Division 1 & 2, Groups B, C, D, T3 certification, with China and Russia pattern approvals available.
Industrial Applications
The ProTech903™ is well suited to natural gas sweetening plants, custody transfer stations (inlet/outlet), and petrochemical flare gas monitoring applications across Oman. Its proven, low-maintenance lead-acetate tape technology gives facilities the reliable H2S and total sulfur data needed to monitor critical parameter levels for product quality, pipeline and equipment safety, and regulatory and contractual compliance.
Backed by manufacturer datasheet documentation, Seven Star LLC supports natural gas processing plants, refineries, and custody transfer operators throughout the Sohar and Salalah economic zones and the broader GCC region with the ProTech903™’s proven, field-tested sulfur measurement capability.
Technical Specifications
Full technical parameters for the ProTech903™ tape-based H2S/Total Sulfur analyzer:
| Parameter | Specification |
|---|---|
| Model | ProTech903™ (H2S / Total Sulfur / Arsine / Phosphine) |
| Measurement Principle | Lead-Acetate Tape (Colorimetric) |
| Accuracy / Repeatability | ±2% F.S. (1-50 ppm); ±2.5% F.S. (>50 ppm); ±5% F.S. (<0.5 ppm) |
| Response Time | 30 Seconds to Alarm |
| Calibration Interval | Every 3-4 Months (Self-Zeroing Each Cycle) |
| Ambient Temperature | 0°C to 50°C (32°F to 122°F) |
| Communication | Modbus RS232/RS485, Optional TCP/IP, Ethernet, USB |
| Relays / Analog Outputs | 6 x SPDT Relays; 6 x 4-20mA Outputs |
| Enclosure Options | Weatherproof (W), Division 1 (D1), Division 2 (D2) |
| Certification | CSA Class 1 Div 1 & 2, Groups BCD, T3; ATEX/IECEx; China & Russia Pattern Approval |
Tape Cartridge and Global Certification
The ProTech903™ tape cartridge is engineered for extended field service, with a typical operating lifetime of 5 to 14 weeks depending on the application and configuration selected, reducing the maintenance burden on remote monitoring sites compared with consumable-intensive alternatives. Beyond CSA Class 1 Division 1 & 2 approval, the analyzer carries ATEX and IECEx certification for use in classified hazardous areas outside North America, along with India CCOE and China pattern approvals, giving Seven Star LLC the flexibility to supply a single proven platform across the differing hazardous-area regimes found on projects throughout Oman and the wider GCC.
Request a Quote for ProTech903™ Tape-Based H2S/Total Sulfur Analyzer
To submit a formal Request for Quote (RFQ), check current availability and lead time, or arrange technical consultation for the ProTech903™ Tape-Based H2S/Total Sulfur Analyzer, please contact Seven Star LLC today. Working closely with plant engineers in the region, our engineers are ready to assist with rapid sourcing for your H2S and total sulfur monitoring projects.
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Datasheets & Documents
- Datasheet Galvanic ProTech903 H2S Analyzer Brochure Download
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About brand
Galvanic Applied Sciences is the Canadian maker of process analysers for natural gas, refining and water: lead acetate tape and laser-based H2S and total sulfur analysers, tail gas analysers, UV photometers and turbidity monitors. The company is based in Calgary, Alberta, and began as a distributor of hydrogen sulfide analysers in Western Canada before moving into designing and manufacturing its own analysers.
Seven Star LLC sources and supplies Galvanic process analyzers for gas and liquid streams, together with their consumables and spare parts, for operators in Oman, working from the analyzer model, serial number and application data.
Galvanic company profile
| Headquarters | Calgary, Alberta, Canada |
|---|---|
| Origins | Started as a distributor of H2S analysers in Western Canada, then moved into manufacturing |
| Certification | IECEx certification for the ProTech903 analyser obtained in 2017 |
| Product families | ProTech903 and 801 series lead acetate tape H2S and total sulfur analysers, AccuLase laser H2S analysers, 943-TGX tail gas analysers, FPA UV photometers, MONITEK turbidity and colour monitors |
Galvanic analyzer families listed here
Galvanic analyzers on this page fall into three groups:
- Sulfur and gas quality: ProTech903 and ProTech 1000 Z2 tape-based H2S and total sulfur analyzers, the AccuLase-GPA tunable diode laser analyzer for H2S, CO2 and H2O, and AccuChrome gas chromatographs for heating value and composition
- Sulfur recovery: Brimstone analyzer systems and the 943-TGX tail gas analyzer
- Liquids and photometry: Monitek turbidity, suspended solids and color monitors, Monitek Ultrasonic oil-in-water monitors, the AccuSeries-LPA wet chemistry analyzer, the Viscosite in-line viscometer and FPA 4100 UV photometers
GasMicro and GasMicro NG electronic volume correctors complete the list.
Where Galvanic analyzers are used
The manufacturer names natural gas processing, pipelines and distribution, refining and oil production, chemical and petrochemical production, power and biogas, water and wastewater, and food and beverage as its markets. In the GCC the common duties are H2S and total sulfur at sales gas and custody transfer points, tail gas control on Claus sulfur recovery units, heating value measurement, and oil-in-water monitoring of produced water.
Galvanic products we list
Ordering Galvanic analyzers and parts: what we need
For a new Galvanic H2S analyzer or chromatograph, send the stream composition, the component and range to be measured, sample pressure and temperature, the number of streams, area classification, power supply and the outputs required. For consumables and spares such as sensing tape, lamps, columns or pump parts, send the analyzer model and serial number and the part number from the manual. Manuals differ by generation, so a nameplate photo helps us check the item against the manufacturer's documentation.
Facts checked against Galvanic Applied Sciences' published company information, October 2026.
Browse Galvanic products by category: Gas Analyzer Systems, Liquid Analytical Systems, Flow Computers.
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Frequently Asked Questions
What gases can the ProTech903 measure?
The ProTech903 measures H2S and Total Sulfur, and can also be configured for arsine, phosphine, or phosgene detection depending on the analyzer configuration selected.
How often does the ProTech903 need calibration?
The ProTech903 self-zeros at every tape advance, so calibration is typically required only every 3-4 months.
How does the lead-acetate tape measurement work?
A fresh section of tape is exposed to the sample every 3-4 minutes and darkens at a rate proportional to H2S concentration; a sensor measures the change in reflected light intensity to determine the reading.
What enclosure options are available for the ProTech903?
The ProTech903 is available in Weatherproof (W), Division 1 (D1), and Division 2 (D2) enclosure configurations to match different hazardous area requirements.
Is Seven Star LLC a trusted supplier for Galvanic products?
Yes. Seven Star LLC is an experienced supplier of Galvanic Applied Sciences instrumentation in Oman and the GCC, providing genuine products with full support.
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