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Instrava provided the uv gas analyzer based on advanced DOAS (Differential Optical Absorption Spectroscopy) technology delivers highly accurate, real-time measurement of multiple gases in complex industrial environments.
Designed for continuous emission monitoring systems (CEMS) and industrial process control, this analyzer supports simultaneous detection of SO₂, NO, NO₂, NH₃, CO, CO₂, O₂, H₂S, Cl₂, O₃, HCl and more, making it an ideal solution for power plants, coal chemical industries, and environmental compliance projects.
With fast response (<10s), no warm-up required, and low operational cost, it enables engineers and environmental managers to make fast, reliable decisions while ensuring regulatory compliance and process optimization.
Optical Analysis Description
Multi-Gas Monitoring Capability for Complex Industrial Applications
This industrial UV gas analyzer integrates DOAS + PLS chemometric algorithms, ensuring high selectivity and accurate measurement even in cross-interference gas environments.
Simultaneous detection of multiple flue gases and toxic gases
Flexible configuration for custom gas measurement ranges
High stability with low drift and excellent repeatability
Ideal for continuous stack emission monitoring and process gas analysis
Environmental monitoring (pollution source emission monitoring)
Coal-fired power plants & boiler flue gas analysis
Coal chemical and petrochemical processes
Industrial combustion optimization
This makes it a reliable UV DOAS gas analyzer for emission monitoring systems in demanding industrial environments.


Reliable Performance & System Integration Advantages
Engineered for industrial integration, this online UV gas analyzer system offers stable long-term operation and flexible connectivity for automation systems.
High accuracy: Linear error ≤ ±1.5% F.S
Fast response time: T90 < 10 seconds
No preheating required: Immediate operation for faster deployment
Low drift design: Ensures long-term measurement stability
Multiple outputs: 4–20mA, RS485, RS232, GPRS
Supports PLC / DCS / SCADA integration
Multi-channel I/O: relay outputs & analog inputs
Optimized for continuous industrial monitoring systems
Wide humidity tolerance up to 95% RH
Stable operation in variable process environments
Low maintenance and reduced lifecycle cost
Optical Analysis Parameter
| Parameter | Specification |
|---|---|
| Measurement Technology | UV DOAS |
| Measured Gases | SO₂, NO, NO₂, O₂, NH₃, CO, CO₂, Cl₂, O₃, H₂S, HCl, CH₃I (expandable) |
| Measurement Range | Customizable |
| Linear Error | ≤ ±1.5% F.S |
| Repeatability | ≤ 0.5% |
| Zero Drift | ≤ ±2% F.S / 7 days |
| Span Drift | ≤ ±2% F.S / 7 days |
| Response Time | < 10s (T90) |
| Warm-up Time | None |
| Flow Rate | 0.7 – 1.2 L/min |
| Inlet Pressure | 2 – 50 kPa |
| Analog Output | 5 × 4–20mA |
| Analog Input | 3 × 4–20mA |
| Digital Communication | RS485 / RS232 / GPRS |
| Relay Output | 14 channels |
| Digital Input | 6 channels |
| Protection Rating | IP42 |
| Operating Temperature | -10°C ~ +40°C |
| Humidity | 0–95% RH |
Instrava OEM/ODM
Reliable Instruments. Solutions That Fit Your Application.
Instrava is focused on delivering reliable industrial solutions through carefully curated products, application-driven optimization, and flexible customization. We select proven instruments from trusted manufacturers to ensure consistent quality, optimize solutions based on real working conditions to solve practical challenges, and provide tailored configurations to meet specific application needs.
By combining selection expertise with application understanding, Instrava helps customers reduce risk, improve efficiency, and achieve dependable results in complex industrial environments.

What is a UV gas analyzer and how does DOAS technology work?
A uv gas analyzer uses Differential Optical Absorption Spectroscopy (DOAS) to measure gas concentrations by analyzing UV light absorption characteristics. It provides high selectivity and accuracy for gases like SO₂, NOx, and NH₃ in industrial emissions.
What gases can a UV DOAS gas analyzer measure?
It can measure SO₂, NO, NO₂, NH₃, CO, CO₂, O₃, H₂S, Cl₂, HCl, and other gases, making it suitable for multi-gas emission monitoring systems in industrial plants.
Is a UV gas analyzer suitable for continuous emission monitoring systems (CEMS)?
Is a UV gas analyzer suitable for continuous emission monitoring systems (CEMS)?
What are the advantages of UV gas analyzers over infrared analyzers?
Compared to infrared systems, UV gas analyzers offer better detection of NOx, SO₂, and reactive gases, with higher sensitivity in low concentration ranges and reduced cross-interference.
Can the UV gas analyzer operate in harsh industrial environments?
Yes. It is designed for high humidity, variable pressure, and complex gas mixtures, ensuring stable performance in power plants, chemical plants, and flue gas monitoring applications.
How is a UV gas analyzer integrated into industrial control systems?
How is a UV gas analyzer integrated into industrial control systems?
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We specialize in industrial analysis and detection, with a clear understanding of real-world operating environments and requirements.
Every instrument is evaluated based on performance, stability, and application suitability—not just specifications or pricing.
We work with trusted manufacturers to ensure stable supply, consistent quality, and dependable delivery.
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