Natural gas analyzer 933

hydrogen sulfidemonitoringautomatic

Overview
The 933 is an ultraviolet (UV) photometric analyzer system designed for low-level measurement of hydrogen sulfide (H2S) in natural gas. Optional configurations allow measurement of carbonyl sulfide (COS) and methyl mercaptan (CH3SH). The instrument integrates analyzer and sample handling for extended unattended operation and provides fast response to changes in sulfur-species concentrations.

Technology and Operation
The 933 combines a proprietary frontal elution chromatography sampling technique with a high-resolution, multi-wavelength 900 Series UV optical bench. It uses non-dispersive, dual-beam hollow cathode UV photometric detection for H2S (and optionally COS and CH3SH). Two self-regenerating columns alternate conditioning and regeneration to maintain continuous operation and automatic recovery after high-concentration events.

Key Features

• Fully integrated analyzer and sample system for unattended use
• Two self-regenerating columns for automatic recovery after high H2S events
• Fast response to increasing or decreasing sulfur concentrations
• Optional measurement of COS and CH3SH
• Proprietary frontal elution chromatography for separation from interferents
• High-resolution, multi-wavelength 900 Series UV optical bench
• Non-dispersive, dual-beam hollow cathode UV photometric detection
• Accuracy better than ±2% of full scale on standard ranges

Typical Applications

• Hydrocarbon processing
• Natural gas quality monitoring
• Petrochemical industry monitoring

Technical specifications

• Analytes: Hydrogen sulfide (H2S); optional carbonyl sulfide (COS) and methyl mercaptan (CH3SH)
• Detection method: Non-dispersive, dual-beam hollow cathode UV photometry
• Sampling technique: Proprietary frontal elution chromatography
• Optical bench: 900 Series, high-resolution multi-wavelength UV
• Self-recovery: Two self-regenerating columns (one conditions sample while the other regenerates)
• Accuracy: Better than ±2% of full scale on standard ranges
• Operation: Fully integrated analyzer and sample system, capable of unattended extended operation