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Optical Analysis
Home » Products » Optical Analysis » Industrial Gas Analyzer for Explosion-Proof NDIR Gas Analyzer

The industrial gas analyzer from Instrava is designed for accurate and continuous monitoring of industrial process gases using advanced NDIR (Non-Dispersive Infrared) technology. This technology provides reliable gas concentration measurement with high sensitivity, strong anti-interference capability, and long-term stability.
The analyzer supports measurement of multiple gases including CO, CO₂, CH₄, NH₃, hydrocarbons (CnHm), sulfur hexafluoride (SF₆), and sulfur dioxide (SO₂). With high accuracy (≤±2% F.S.) and resolution up to 0.01%, the system is suitable for industrial applications that require precise gas composition monitoring and emission control.
Equipped with an explosion-proof housing (ExdIICT6 / ExtDA21 IP65), the analyzer can operate safely in hazardous industrial environments, providing stable performance even in demanding process conditions.
Optical Analysis Description
Industrial Gas Analysis for Process Control and Emission Monitoring
This explosion-proof industrial gas analyzer is widely used in industrial sectors where accurate gas composition monitoring is essential for process control, environmental protection, and safety management.
Typical applications include:
Petrochemical and chemical processing plants
Industrial combustion and process gas monitoring
Flue gas emission monitoring systems
Waste treatment plants and environmental monitoring projects
Landfill gas and biogas monitoring systems
Industrial gas safety monitoring in hazardous areas
The analyzer enables continuous real-time gas analysis, helping engineers optimize industrial processes, improve combustion efficiency, and ensure regulatory compliance for environmental emissions.
With wall-mounted installation and robust metal construction, the system is suitable for long-term industrial operation in harsh environments.


Explosion-Proof NDIR Gas Detection with Intelligent Monitoring
The Instrava industrial gas analyzer integrates advanced NDIR sensing technology with intelligent data processing and industrial communication interfaces to ensure accurate and reliable monitoring.
Key system advantages include:
High-precision NDIR infrared detection for stable gas analysis
Fast response time (T90 ≤ 15 seconds) for real-time monitoring
Large data storage capacity (up to 65,536 records) with configurable intervals
TFT true-color display with full English menu interface for easy operation
Infrared remote control and parameter configuration
The analyzer supports multiple industrial communication options including 4–20 mA analog output, RS485/RS232 digital communication, and relay outputs, allowing easy integration with PLC, DCS, or SCADA systems.
Its advanced constant-flow gas path system ensures stable sampling and continuous measurement, making the analyzer suitable for long-term industrial gas monitoring applications.
Optical Analysis Parameter
| Parameter | Specification |
|---|---|
| Product Type | Industrial Gas Analyzer |
| Measurement Principle | NDIR (Non-Dispersive Infrared) |
| Measured Gases | CO, CO₂, CH₄, NH₃, CnHm, SF₆, SO₂ |
| Measurement Range | CO: 0–1% / CO₂: 0–1000 ppm / CH₄: 0–2% / NH₃: 0–1% / SF₆: 0–100 ppm / CnHm: 0–1% / SO₂: 0–5% |
| Accuracy | ≤ ±2% F.S |
| Resolution | 0.01% |
| Repeatability | ≤ ±1% F.S |
| Stability | ≤ ±1% F.S / 7 days |
| Response Time | T90 ≤ 15 s |
| Explosion-Proof Rating | ExdIICT6 / ExtDA21 IP65 T80℃ |
| Storage Capacity | 65,536 records |
| Storage Interval | 1 s – 99 min adjustable |
| Analog Output | 4–20 mA (optional 0–10 V) |
| Digital Output | RS485 / RS232 |
| Relay Output | Dual relay output |
| Power Supply | 220 VAC / 24 VDC |
| Power Consumption | ≤ 25 W |
| Operating Temperature | -25°C to +55°C |
| Humidity | ≤ 90% RH |
| Sample Gas Flow | 400 ± 50 ml/min |
| Sample Gas Pressure | 0.05 – 0.25 MPa |
| Sample Gas Requirements | Dust-free, moisture-free, oil-free |
| Installation | Wall-mounted |
| Dimensions | 260 × 260 × 206 mm |
| Weight | ~15 kg |
| Service Life | > 6 years |
Instrava OEM/ODM
At Instrava, our instruments are developed with a strong focus on real industrial applications. Each product is designed to operate as a reliable component within measurement, control, and automation systems, rather than as a standalone device.
Our engineering team supports customers during product selection by evaluating process conditions, operating environments, and system requirements, ensuring stable and long-term performance in actual use.
In addition to standard configurations, Instrava offers flexible customization options, including measurement range, materials, output signals, communication interfaces, and installation methods. All custom solutions are engineered to meet industrial standards and application-specific demands.
We also support OEM projects and system integration, providing consistent product design, technical documentation, and long-term supply to ensure smooth integration and reliable operation throughout the project lifecycle.

Related Product Recommendations
An industrial gas analyzer is used to measure gas concentrations in industrial processes and emissions. It helps monitor gases such as CO, CO₂, CH₄, NH₃, and SO₂ to ensure process efficiency, safety, and environmental compliance.
An NDIR industrial gas analyzer measures gas concentration by detecting the infrared absorption characteristics of specific gases. This method offers high accuracy, strong selectivity, and minimal interference from other gases.
Explosion-proof gas analyzers are designed for hazardous environments where flammable gases may be present. Their certified enclosure prevents sparks or heat from igniting explosive atmospheres, ensuring safe operation in petrochemical or industrial plants.
Industrial gas analyzers are widely used in:
Petrochemical plants
Chemical manufacturing
Power generation facilities
Environmental monitoring systems
Waste treatment plants
Industrial gas processing industries
Depending on configuration, industrial gas analyzers can detect gases such as CO, CO₂, CH₄, NH₃, hydrocarbons, SF₆, and SO₂, allowing multi-gas monitoring in industrial processes.
Yes. Most industrial gas analyzers support 4–20 mA analog output, RS485/RS232 communication, and relay signals, allowing integration with PLC, DCS, or SCADA systems for automated monitoring and process control.
By choosing Instrava, you gain a partner with a deep understanding of industrial applications and the expertise to meet today’s operational challenges.
Our role extends beyond products—we support your success through dependable solutions and long-term commitment.
Innovation at Instrava is guided by real industrial requirements. We continuously refine our technologies to address evolving operational challenges, ensuring practical and reliable performance in demanding environments.
We provide engineering-level customization to match specific process conditions. From measurement range and materials to output signals and installation options, our solutions are configured to fit real applications.
Quality and reliability are fundamental to every Instrava product. Manufactured under strict quality control and thoroughly tested, our instruments deliver accurate, stable, and long-term performance.
Instrava combines global engineering expertise with responsive local support, ensuring our partners benefit from internationally aligned technology and timely regional service.
Our broad portfolio of measurement and control instruments enables us to address a wide range of industrial needs, providing integrated solutions from a single, reliable source.
We work closely with our partners from technical consultation to after-sales support. Our focus is on delivering solutions that create lasting value and support long-term operational success.
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