Applied Analytics OMA-300 H2S Analyzer

Overview

The Applied Analytics OMA-300 H2S Analyzer is a continuous hydrogen sulfide monitor built on the proven OMA-300 diode-array spectroscopy platform, purpose-configured for the demanding job of tracking H2S concentration in sulfur recovery unit (SRU) tail gas, amine scrubber outlets, and other H2S-bearing process streams. Rather than relying on wet-chemistry methods or electrochemical cells that drift and require frequent reagent replacement, the OMA-300 H2S Analyzer uses UV-Vis absorbance spectroscopy to give plant operators a continuous, real-time H2S reading with none of the consumable dependency that limits older technologies.

Working closely with plant engineers in the region, Seven Star LLC supplies the OMA-300 H2S Analyzer to refineries and gas processing facilities across Oman and the wider GCC, with manufacturer documentation and technical support with selection. Sulfur recovery and gas sweetening units operating in the Sultanate of Oman can specify this analyzer with the assurance of regional technical support rather than depending solely on overseas manufacturer contact.

Operating Principle

The Applied Analytics OMA-300 H2S Analyzer measures hydrogen sulfide by directing pulsed xenon light through the sample stream and capturing the resulting absorbance spectrum with a nova II diode-array spectrophotometer. H2S exhibits a distinctive absorbance signature in the ultraviolet region, and chemometric de-convolution algorithms isolate that signature from the total spectrum even in the presence of other sulfur species and hydrocarbon background, delivering an accurate H2S reading once every 1-5 seconds. Because the entire spectrum is captured in a single optical pass rather than through a slower sequential scan, the analyzer can track fast upset conditions in an SRU tail gas stream that a slower or reagent-based technology would miss entirely.

This spectroscopic approach eliminates the reagent consumption, cell fouling, and drift correction routines that plague lead-acetate tape or electrochemical H2S analyzers in continuous SRU service. With zero moving parts in the optical path and zero drift held to within ±0.1% after a one-hour warm-up, the OMA-300 H2S Analyzer sustains long unattended run periods between maintenance interventions, which is exactly the duty cycle sulfur recovery operators need from a tail-gas monitoring instrument that directly informs Claus unit efficiency and environmental emissions reporting.

Engineering Design of the Applied Analytics OMA-300 H2S Analyzer

The Applied Analytics OMA-300 H2S Analyzer shares its core enclosure architecture with the base OMA-300 platform: a wall-mounted indoor/outdoor housing rated for ATEX and Class I Division 1/2 hazardous areas, with purged (Eexp) or cast-aluminum flameproof (Eexd) explosion-proof variants available for SRU and Claus unit environments where hydrogen sulfide and flammable gas hazards coexist. A 19-inch rackmount version is also available for analyzer-shelter installations serving multiple sample points around a sulfur plant.

Power requirements are universal 85-264 VAC at 47-63 Hz, drawing only 45 watts, and the analyzer communicates via one galvanically isolated 4-20 mA output per measured species with optional Modbus TCP/IP, RS-232, RS-485, Fieldbus, Profibus, or HART protocols for direct wiring into the unit’s DCS. The onboard ECLIPSE touch-screen interface gives SRU operators immediate access to live H2S trend data, diagnostic status, and calibration history at the analyzer itself, which is particularly valuable in remote or outdoor sulfur plant locations.

Key Features

The Applied Analytics OMA-300 H2S Analyzer platform is engineered specifically around the reliability demands of continuous sulfur recovery monitoring, and its key features include the following:

• Continuous, reagent-free hydrogen sulfide measurement using UV-Vis diode-array absorbance spectroscopy, eliminating consumable dependency.
• Response time of 1-5 seconds, fast enough to capture upset conditions in SRU tail gas before they escalate.
• Zero drift held to within ±0.1% after warm-up, supporting long unattended operation between recalibrations.
• A pulsed xenon light source with an average five-year service life, minimizing lamp-change downtime on sulfur units.
• ATEX and Class I Division 1/2 certified enclosures, including purged and flameproof explosion-proof variants for hazardous SRU environments.
• Isolated 4-20 mA analog outputs plus optional Modbus, HART, Profibus, and Fieldbus connectivity for direct DCS integration.
• A totally solid-state optical path with no moving parts, reducing the mechanical maintenance burden common to wet-chemistry H2S analyzers.
• Onboard ECLIPSE touch-screen software for live spectral review and diagnostics without a separate engineering workstation.

Industrial Applications

The Applied Analytics OMA-300 H2S Analyzer is deployed primarily on sulfur recovery unit tail gas, Claus unit process streams, amine scrubber outlets, and gas sweetening trains where continuous hydrogen sulfide monitoring drives both process efficiency and environmental compliance. Refineries and gas processing plants across Oman and the GCC rely on this class of instrument to hold Claus conversion efficiency within target, protect downstream catalyst beds, and generate the continuous emissions data increasingly required by regional environmental authorities.

With fast quotation turnaround and technical support, Seven Star LLC distributes the OMA-300 H2S Analyzer to refining and gas processing operators throughout Oman and the GCC, including facilities in the Sohar and Salalah industrial and economic zones where sulfur recovery and gas sweetening capacity continues to expand. Regional customers gain access to genuine Applied Analytics hardware together with local commissioning support, calibration services, and spare-parts stock, rather than relying on a purely overseas supply chain for a critical safety and process instrument.

Technical Specifications

The table below summarizes the core specifications of the Applied Analytics OMA-300 H2S Analyzer, and this configuration of the Applied Analytics OMA-300 H2S Analyzer is the standard specification supplied for SRU tail-gas duty.

Also available: Applied Analytics OMA BTX Analyzer

Request a Quote for Applied Analytics OMA-300 H2S Analyzer

Refinery and gas plant engineers across Oman and the GCC can request a formal quotation for the Applied Analytics OMA-300 H2S Analyzer directly from Seven Star LLC, and can confirm current Applied Analytics OMA-300 H2S Analyzer availability and lead time, with full technical datasheets on request and configuration guidance from our instrumentation division for SRU-specific installations. With engineering support in Muscat, Seven Star LLC supplies the OMA-300 H2S Analyzer with manufacturer documentation and local technical support, so contact our team today to specify the right sulfur recovery monitoring solution for your unit.