GS8300-H2S Process H₂S Analyzer
UV fluorescence analyzer for ppb to ppm H₂S in process gas
- Range
- 0-100 ppm (to %vol optional)
- Detection
- 15 ppb
- Response
- <10s T90
- Certification
- ATEX II 2G
Overview
Continuous process analyzer for hydrogen sulfide measurement using pulsed UV fluorescence technology. Designed for natural gas processing, refinery gas treatment, and biogas applications.
- ppb-level detection limit
- Lead-acetate tape not required; optical source and filters remain service items
- ATEX Zone 1 certified
- Automatic background compensation
Full Technical Specifications
Key Performance
| Metric | Value | Status |
|---|---|---|
| Range | 0-100 ppm; extended to %vol optional | confirmed |
| Detection | 15ppb | confirmed |
| Accuracy | ±1% of reading or ±0.5 ppm | confirmed |
| Response | <10 s T90 | confirmed |
| Certification | ATEX II 2G | confirmed |
Measurement
| Specification | Value |
|---|---|
| Measuring Principle | Pulsed UV Fluorescence |
| Measurement Range | 0–100 ppm (extended to %vol optional) |
| Detection Limit | 15 ppb |
| Accuracy | ±1% of reading or ±0.5 ppm |
| Response Time (T90) | <10 s |
Physical
| Specification | Value |
|---|---|
| Dimensions (W×H×D) | 483 × 177 × 420 mm (19″ rack) |
| Weight | 15.8 kg |
| Housing Material | Powder-coated aluminum, SS316L/Hastelloy wetted parts |
| Mounting | 19″ rack (4U) / wall-mount / field enclosure |
Electrical
| Specification | Value |
|---|---|
| Power Supply | 100–240 VAC, 50/60 Hz, 75 W |
| Analog Output | 2 × 4–20 mA (isolated) |
| Digital Output | Modbus RTU/TCP, HART 7 |
| Relay Outputs | 4 × SPDT |
| Display | 5″ color TFT touchscreen |
Environmental
| Specification | Value |
|---|---|
| Operating Temperature | -20 °C to +50 °C |
| Sample Temperature | Up to 60 °C (higher with cooler) |
| Humidity | 0–95 % RH (non-condensing) |
| Sample Pressure | -50 to +500 mbar |
Certifications
| Specification | Value |
|---|---|
| Hazardous Area | ATEX II 2G Ex d IIB+H2 T4 |
| EMC | EN 61326-1 |
| Safety | EN 61010-1 |
| Quality | ISO 9001:2015 |
Where This Analyzer Fits
This model is mapped to the following industry applications and process duties.
Deployment Environments
Common process environments where this model is evaluated.
Certification Scope
Standards are listed with scope and status so engineering review can verify the applicable enclosure, area, and safety case.
| Standard | Scope | Variant | Status | Document |
|---|---|---|---|---|
| ATEX II 2G Ex d IIB+H2 T4 | Zone 1 hazardous-area installation | Project variant | approved | On request |
| IECEx / CSA / UKCA | International hazardous-area approvals | Project variant | approved | On request |
| EN 61010-1 / EN 61326-1 | Safety and EMC standards | Project variant | approved | On request |
| IP66 | Ingress protection rating | Project variant | approved | On request |
Request Documentation
Request technical datasheets, user manuals, certificates, and application notes for this model.
Evidence Notes
Process H₂S measurement architecture for amine-unit outlet control
Application note based on the existing natural-gas processing scenario: pulsed UV fluorescence supports continuous H₂S tracking at amine-unit outlets while avoiding the lead-acetate tape measurement path. Control-loop behavior depends on sample conditioning, reference-gas practice, and plant control setup.
Technical & Engineering Details
Secondary engineering detail — expand each topic for the full measurement, envelope, sample-system, calibration, integration, maintenance and application evidence.
01 Measurement Principle and Limits
How the measurement is bounded
Pulsed UV fluorescence measures H₂S continuously for process gas applications.
Rejects
- Lead-acetate tape measurement path
Requires
- Certified H₂S reference gas for 3-month span verification
- Instrument-grade N₂ for daily auto-zero
- Coalescing filter and pressure regulator for natural-gas streams
- Cool-dry conditioning path for wet biogas
Interferents and Limits
- High hydrocarbon background requires the built-in background-compensation path
- Moisture load in wet biogas must be removed before the analyzer inlet
02 Operating Envelope
Use these limits as selection inputs, then confirm sample condition, ambient exposure, and materials before quotation.
- Wet biogas without moisture removal
- Sample pressure outside stated process inlet range
03 Sample System Boundary
Sampling mode, conditioning components, and exclusions define where the analyzer responsibility ends and the sample system begins.
- coalescing filter
- pressure regulator
- GS-SCS-600 cool-dry path for wet biogas
- 19-inch rack / wall-mount / field enclosure analyzer
- Natural-gas or wet-biogas duty should be reviewed against filtration, pressure regulation, and moisture removal needs
04 Calibration & Validation
Calibration method, interval, and traceability are shown only when structured data is available.
Zero / Span Method
Daily auto-zero with instrument-grade N₂; 3-month span verification with certified H₂S reference gas
Interval
3-month span verification; daily auto-zero supported
Span Gas Traceability
Certified H₂S reference gas required
05 I/O & Integration
Signal outputs and communication interfaces shown from the published specification fields on this product page.
Analog Output
2 × 4–20 mA (isolated)
Digital Output
Modbus RTU/TCP, HART 7
Relay Outputs
4 × SPDT
DAHS Review Note
Confirm protocol map, channel naming, alarm states, and reporting format during project integration review.
06 Maintenance & Spares site-specific
Tasks, consumables, and access items are shown only when structured maintenance data is available.
- 3-month span verification with certified H₂S reference gas
- Daily auto-zero review using instrument-grade N₂
- Conditioning-path inspection for natural-gas or wet-biogas service
- Moisture-removal review where wet biogas is present
- Sample filters
- Certified H₂S reference gas
07 Application Evidence
Application context from complex industrial environments.
Application Context
Natural-gas processing plants running lead-acetate tape analyzers for H₂S at amine-unit outlets face two structural issues: ongoing tape-consumable supply, and a 3-minute measurement delay that prevents real-time amine-circulation control.
Architecture Response
GS8300-H2S with UV fluorescence reduces the lead-acetate tape-consumable path and provides <10 s continuous readings for amine-circulation control review against the <1 ppm H₂S spec.
Frequently Asked Questions
What advantage does UV fluorescence have over lead-acetate tape?
UV fluorescence is a continuous, real-time measurement that does not use lead-acetate tape. Lead-acetate provides intermittent readings (every 3–5 min) and generates chemical waste requiring disposal.
Can it measure H₂S in natural gas with high hydrocarbon background?
Yes, UV fluorescence is selective to H₂S within the stated natural-gas matrix, and built-in background compensation handles varying hydrocarbon compositions.
What is the ATEX classification?
ATEX II 2G Ex d IIB+H2 T4 Gb for Zone 1 installation. The flameproof enclosure is rated for hydrogen-containing atmospheres.
What sample conditioning is needed?
For natural gas streams, a simple coalescing filter and pressure regulator is sufficient. For wet biogas, use the GS-SCS-600 Cool-Dry System to remove moisture.
Does it support ppb-level measurement?
Yes, with a detection limit of 15 ppb, it is suitable for trace H₂S monitoring in treated gas, pipeline quality, and odor threshold applications.
What is the expected calibration interval?
3-month span verification with certified H₂S reference gas. Auto-zero can run daily using instrument-grade N₂.
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View ProductsCompare GS8300-H2S with adjacent options
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When this model is preferred
Select GS8300-H2S when its measurement principle, range, and form factor match the process duty and certification scope.
When to consider an alternative technology
Consider another analyzer when the gas matrix, sample temperature, hazardous-area scope, or reporting requirement falls outside the stated envelope.
Review GS8300-H2S against site conditions
Send gas range, sample temperature, pressure, moisture, and certification needs before final model selection.