ProTech903™ Tape-Based H2S/Total Sulfur Analyzer
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.
As an authorized supplier of Galvanic instrumentation, Seven Star LLC proudly 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.
As an authorized supplier of Galvanic instrumentation, 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 |
Call To Action
To submit a formal Request for Quote (RFQ), check regional stock availability, or arrange technical consultation for the ProTech903™ Tape-Based H2S/Total Sulfur Analyzer, please contact the official instrumentation division at Seven Star LLC today. As an authorized supplier of Galvanic instrumentation in Oman and the GCC, our engineers are ready to assist with rapid sourcing for your H2S and total sulfur monitoring projects.
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