GESHINE UV-DOAS Process Chlorine Analyzer
UV-DOAS chlorine analyzer for continuous process monitoring in chlor-alkali and chemical plants
- Principle
- UV-DOAS (differential optical absorption)
- Range
- Configured per application (datasheet pending)
- Accuracy
- Configured per application (datasheet pending)
- Output
- 4-20mA, Modbus, HART
Overview
Gas-phase Cl2 measurement belongs to GESHINE’s unnumbered UV-DOAS platform in the brochure. The page is retained as a UV-DOAS chlorine configuration, without assigning a fabricated numeric ZS model. It uses UV differential optical absorption spectroscopy for continuous gas-phase Cl₂ measurement in chlor-alkali production, water treatment, and chemical safety applications.
- UV-DOAS optical cell architecture
- Humidity and temperature compensation in the optical model
- Automatic reference spectrum compensation
- Corrosion-resistant wetted parts (project-configured for chlorine and acid-gas duty)
- Extractive sample conditioning selected for wet-stack or acid-gas duty
- Gas-phase Cl2 configuration of the unnumbered UV-DOAS platform
Full Technical Specifications
Key Performance
| Metric | Value | Status |
|---|---|---|
| Measurement Principle | UV-DOAS (differential optical absorption spectroscopy) | confirmed |
| Range | Configured per application (datasheet pending) | datasheet pending |
| Accuracy | Configured per application (datasheet pending) | datasheet pending |
| Response | Configured per application (datasheet pending) | datasheet pending |
| Output | 4-20mA, Modbus, HART | confirmed |
Specifications
| Specification | Value |
|---|---|
| Measurement Principle | UV-DOAS (differential optical absorption spectroscopy) |
| Target Component | Gas-phase Cl₂ |
| Range | Configured per application (datasheet pending) |
| Accuracy | Configured per application (datasheet pending) |
| Response | Configured per application (datasheet pending) |
| Wetted Materials | Configured per application (datasheet pending) |
| Output | 4-20mA, Modbus, HART |
Deployment Environments
Common process environments where this model is evaluated.
Certification Scope
No certificate list is published for this unnumbered UV-DOAS configuration. Applicable standards, enclosure, area, and safety case are project-configured and confirmed during engineering review.
| Standard | Scope | Variant | Status | Document |
|---|---|---|---|---|
| Hazardous-area / functional safety | No certificate scope is published for this unnumbered configuration; applicable approvals are project-configured and confirmed during engineering review | Project variant | datasheet pending | On request |
Request Documentation
Request technical datasheets, user manuals, certificates, and application notes for this model.
Evidence Notes
Gas-phase UV-DOAS chlorine architecture
The application set covers chlor-alkali, chemical storage, pulp and paper, and gas-phase water-treatment dosing contexts. This gas analyzer path uses UV-DOAS, corrosion-resistant project-configured wetted parts, reference-spectrum compensation, and extractive sample conditioning where wet or acid-gas matrices are present.
Technical & Engineering Details
Secondary engineering detail — expand each topic for the full measurement, envelope, sample-system, and maintenance information.
01 Measurement Principle and Limits
How the measurement is bounded
UV-DOAS measures gas-phase Cl2 absorption with differential spectral processing for continuous process monitoring.
Requires
- Corrosion-resistant wetted parts (project-configured) for chlorine and acid-gas contact
- Reference-spectrum compensation for changing UV background
- Extractive sample conditioning selected for wet-stack or acid-gas duty
Interferents and Limits
- SO2, HCl, and HF spectral overlap can require matrix-specific compensation
- Aerosols or condensation in a wet-stack sample path can change the optical basis
- Aqueous free or total chlorine residual measurement is a separate aqueous water-domain path, not this gas-phase analyzer
- Wet-stack gas without heated or corrosion-resistant sample conditioning
- High SO2, HCl, or HF background without UV-DOAS matrix review
02 Operating Envelope
Use these limits as selection inputs, then confirm sample condition, ambient exposure, and materials before quotation.
- Cl2
- SO2/HCl/HF spectral-overlap matrix review
- Aqueous chlorine residual analysis
- Wet-stack or condensing duty without suitable heated sample conditioning
- Matrix with strong UV-absorbing acid gases without application review
03 Sample System Boundary
Sampling mode, conditioning components, and exclusions define where the analyzer responsibility ends and the sample system begins.
- UV-DOAS optical cell
- reference spectrum compensation
- corrosion-resistant wetted path (project-configured)
- extractive sample conditioning
- Aqueous sample panels are outside this gas-phase analyzer boundary
04 Maintenance & Spares site-specific
Tasks, consumables, and access items are shown only when structured maintenance data is available.
- Inspect UV optical path and corrosion-resistant wetted components for acid-gas service
- Review reference-spectrum compensation when Cl2, SO2, HCl, or HF matrix changes
- Confirm heated or cool-dry sample conditioning selection before wet-stack duty
- Sample-line filters or conditioning parts when configured extractively
Frequently Asked Questions
What does this analyzer measure, and how?
This is the gas-phase Cl₂ configuration of GESHINE’s unnumbered UV-DOAS platform. It uses UV-DOAS — UV differential optical absorption spectroscopy — to measure gas-phase Cl₂ absorption with differential spectral processing for continuous process monitoring. Range, accuracy, and response are configured per application (datasheet pending); no numeric ZS model is assigned to this configuration.
How does this analyzer handle corrosive chlorine and acid-gas service?
It uses corrosion-resistant wetted parts, project-configured for chlorine and acid-gas contact (specific materials are datasheet pending). The operating envelope covers Cl₂ and an SO₂/HCl/HF spectral-overlap matrix review; matrices with strong UV-absorbing acid gases should be reviewed before application.
Which gases can interfere with the Cl₂ measurement?
SO2, HCl, and HF spectral overlap can require matrix-specific compensation. Aerosols or condensation in a wet-stack sample path can change the optical basis, and a high SO2, HCl, or HF background should get a UV-DOAS matrix review.
What sample conditioning does this analyzer require?
It runs in an extractive configuration with reference-spectrum compensation and a corrosion-resistant, project-configured wetted path; extractive sample conditioning is selected for wet-stack or acid-gas duty. The compatible conditioning systems are the ZS-SCS-600 Cool-Dry Sampling System and the ZS-SCS-800 High-Temperature Heated Sampling System. Aqueous sample panels are outside this gas-phase analyzer boundary.
Can this analyzer measure chlorine residual in water?
No. This is a gas-phase Cl₂ analyzer. Aqueous free or total chlorine residual measurement is a separate aqueous water-domain path, not this gas analyzer.
What approvals does this analyzer carry?
No certificate list is published for this unnumbered UV-DOAS configuration. Applicable approvals, hazardous-area scope, and any functional-safety rating are project-configured and confirmed against the installation and safety case during engineering review.
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