High-Frequency Infrared Carbon Sulfur Analyzer – QT-CSA-3500
Carbon Sulfur Analyzer QT-CSA-3500 is designed with advanced high-frequency heating and infrared detection, combined with modern combustion and full-range detection technology.
This analyzer is widely used in industries such as steel, powder metallurgy, non-ferrous metals, magnetic materials, new energy, third-party testing, and research institutes. It enables fast and simultaneous determination of carbon and sulfur in steel, alloys, non-ferrous metals, powder metallurgy, rare earths, NdFeB, ores, and other solid materials.
With reliable stability and efficient high-frequency power, the system ensures complete combustion of samples while delivering strong resistance to high-frequency interference.
Dual Combustion Furnace Infrared Carbon Sulfur Analyzer – QT-CSA-3500G
Dual Combustion Furnace Infrared Carbon Sulfur Analyzer QT-CSA-3500G is a high-performance system built with advanced infrared technology. To support a wide range of samples and analytical requirements, it is equipped with two sample pretreatment units: a high-frequency induction furnace and a tubular resistance furnace.
Both furnaces operate with the same infrared detection system to measure the composition of output gases, and switching between them is quick and straightforward.
The QT-CSA-3500G offers exceptional versatility for carbon and sulfur analysis across a broad spectrum of materials, including steel, cast iron, alloys, metal ores, ceramics, cement, lime, rubber, coal, coke, refractory materials, carbides, graphite, oil, catalysts, soil, and other solid samples.
Instrument Principle:
The Dual Combustion Furnace Infrared Carbon Sulfur Analyzer QT-CSA-3500G is designed to meet specific specimen testing needs, allowing users to select either a resistance furnace or an induction furnace as the treatment unit.
During analysis, purified carrier gas (oxygen) is introduced into the combustion furnace, where the specimen undergoes high-temperature oxidation into CO₂, CO, and SO₂. After dust removal and dehydration, the oxidation products are directed by oxygen into the sulfur detection cell for precise sulfur measurement.
The gas mixture then passes into a heated catalytic furnace, where catalytic oxidation converts CO into CO₂ and SO₂ into SO₃. After sulfur removal, oxygen carries the gas sequentially into the high-carbon and low-carbon detection cells for accurate carbon analysis. The remaining gas is discharged safely.
Results for carbon and sulfur content are displayed as %C and %S within the analyzer’s software, which also stores data automatically. The software can generate detailed analysis reports that can be printed via an external printer.
The QT-CSA-3500G delivers fast, precise, and reliable detection of carbon and sulfur in a wide range of materials. It is intuitive to operate, efficient, and simple to maintain, making it an excellent solution for laboratory and industrial applications.
Features of The High-Frequency Infrared Carbon Sulfur Analyzer – QT-CSA-3500:
Modular Setup of the QT-CSA-3500G Dual Combustion Furnace Infrared Carbon Sulfur Analyzer
- Infrared Detection Unit
- Supports up to four independent infrared channels, with a high-sulfur channel available upon request.
- Uses advanced pyroelectric solid-state infrared detectors for accurate measurements.
- Motor
- Swiss synchronous motor ensures continuous, reliable operation.
- Light Source
- Durable infrared light source with stable optical performance and resistance to oxidation.
- Temperature Control
- Maintains consistent IR cell temperature for precise measurement results.
- Copper Oxide Catalysis Furnace (Optional)
- Converts trace CO into CO₂ for complete carbon detection.
- Converts SO₂ to SO₃, absorbed by cotton for environmentally safe operation.
Instrument Self-Check Functions
- Stable and sensitive flow control: High-precision electronic pressure-difference flow technology.
- Gas-saving mode: Automatically stops oxygen flow after each analysis to reduce consumption.
User-Friendly Analysis Software
- English interface compatible with Windows 10/11.
- Free lifetime updates.
Flexible Data Input Options
- Automatic reading
- Manual reading
- Manual data entry
- Automatic crucible tare
Automated Features
- Automatic range switching: Switches between high and low ranges for carbon and sulfur analysis.
- Flux blank deduction: Automatically removes flux blank values from results.
Comprehensive Data & Monitoring
- Release curve storage and comparison
- Statistical data reporting
- Quick search functionality
- Maintenance reminders
- Real-time instrument parameter monitoring
Additional System Checks
- Solenoid Valve Check: Independent display and control of each valve.
- Signal Acquisition Check: Continuous monitoring of all system signals.
- High-Frequency Status Check: Countdown preheating for accurate performance.
- Baseline Check: Real-time baseline monitoring for each channel.
- Automatic Zero Check: Software-controlled auto-zeroing of baselines.
Features of The Dual Combustion Furnace Infrared Carbon Sulfur Analyzer – QT-CSA-3500G:
- Solid-State Infrared Detector Components (Germany-produced): Delivers high precision and stability.
- Flexible Heating Control: Adjustable heating power with support for full manual mode.
- Infrared Thermostatic Technology: Ensures stable measurements with advanced temperature control.
- High-Precision Flow Control: Anti-Overshoot System for precise regulation of analysis gas flow.
- Reliable Circuit Design: Multiple protections, high-quality components, and advanced self-diagnostics.
- Zero Dead Volume Gas Channel: Full close-down design prevents measurement errors.
- Efficient Combustion Analysis: Infrared absorption following high-frequency or tubular furnace combustion enables fast and accurate carbon and sulfur detection in solid inorganics.
Software Functions
- Monitors solenoid valve movements within gas channels.
- Detects and adjusts infrared signals.
- Displays analytical results and curves in real-time.
- Automatically stores results and dynamic release curves.
- Supports automatic or manual specimen weight entry from the electronic balance.
- Automatic channel switching among high-carbon, low-carbon, and sulfur channels.
Data Processing Capabilities
- Multiple data retrieval options (by date, specimen ID, etc.).
- Data screening and statistical analysis (mean, standard deviation, relative deviation).
- Curve comparison for detailed signal evaluation.
Gas Flow & Catalytic Oxidation
- High-precision electronic flow control for stable analysis.
- Copper catalytic furnace ensures:
- Conversion of CO into CO₂ for complete carbon detection.
- Conversion of SO₂ into SO₃, absorbed to prevent air pollution.
Dust Filtration
- Specialized powder metallurgy dust filter.
- Automatic self-cleaning twice during each analysis cycle.
Self-Checking & Diagnostics
- Automatic monitoring of oxygen pressure, rear furnace analysis pressure, and dynamic pressure.
- Real-time monitoring of the high-frequency furnace status and cleaning device reset.
- Step-by-step self-checking with software-assisted valve and signal monitoring.
- Independent part-by-part inspection via software interface.
Weighing & Integration
- Electronic balance directly connected to the computer.
- Automatic transfer of weight data into the software, with manual entry available if required.
Analysis Speed
- High-frequency induction furnace: 40–60 seconds per analysis.
- Tubular resistance furnace: 150–300 seconds per analysis.
Crucibles & Furnaces
- High-Frequency Induction Furnace:
- Crucible: Ceramic, 25 mm diameter × 27 mm height.
- Operating frequency: 18 MHz, max 2.7 KVA.
- Tubular Resistance Furnace:
- Crucible: Porcelain combustion boat, 87 × 12 × 10 mm.
- Max temperature: 1550℃, max 4.4 KW.
- Carborundum heating elements with controlled power for extended service life.
- Reaches working temperature in approx. 20 minutes.
Crucible Pre-Treatment
- Ceramic crucibles for the high-frequency induction furnace can be pretreated in the tubular resistance furnace.
- Dual-use of the resistance furnace improves efficiency and ensures reliable analysis results.
High-Frequency Infrared Carbon Sulfur Analyzer – QT-CSA-3500:
Reasonable Parameter Settings
- Flexible adjustment of analytical parameters tailored to specific sample requirements.
- Calibration methods and parameters can be established and stored independently for different sample types.
- Unlimited number of analytical methods supported for versatile applications.
Powerful Data Management
- Robust database storage with flexible query and statistical functions.
- Customizable printing columns to match user preferences.
- Direct export of analysis data to Excel from the interface.
- Built-in data transmission function for smooth integration with LIMS through network connectivity.
Automatic Cleaning of High-Frequency Furnace
The QT-CSA-3500 Dual Combustion Furnace Infrared Carbon Sulfur Analyzer is equipped with an advanced metal dust filtration system designed for long-term reliability. The dedicated filter can be disassembled and cleaned without the need for tools, ensuring simple and efficient maintenance.
The combustion chamber is automatically cleaned twice during operation, with dust removed after each analysis cycle. To further improve performance, the dust filter features an automatic back-blowing function that prevents dust buildup and enhances adsorption efficiency.
Infrared Detection Unit
The QT-CSA-3500 Infrared Carbon Sulfur Analyzer is equipped with a non-dispersive infrared pool detection system featuring highly sensitive pyroelectric solid-state detectors. The system includes automatic zero-point calibration, managed directly by the computer for consistent accuracy.
By default, the analyzer is configured with three independent infrared channels and can be expanded to four channels as required, providing full-range detection capabilities to meet diverse analytical needs.
Infrared Detection Unit
The QT-CSA-3500 Infrared Carbon Sulfur Analyzer is equipped with a non-dispersive infrared pool detection system featuring highly sensitive pyroelectric solid-state detectors. The system includes automatic zero-point calibration, managed directly by the computer for consistent accuracy.
By default, the analyzer is configured with three independent infrared channels and can be expanded to four channels as required, providing full-range detection capabilities to meet diverse analytical needs.
Carbon Sulfur Analyzer – QT-CSA-3500 Working principle:
Dual Combustion Furnace Infrared Carbon Sulfur Analyzer – QT-CSA-3500G:
Structure of the Analyzer
The QT-CSA-3500G Dual Combustion Furnace Infrared Carbon Sulfur Analyzer is built with a modular design for flexible operation and easy maintenance. Key modules include:
- Electronic balance
- Computer
- Printer
- High-frequency induction combustion unit
- Tubular resistance furnace unit
- Vacuum cleaner
- Additional modular components as required
This modular configuration ensures stable performance, adaptability to diverse applications, and convenient servicing.
Infrared Detection System
- Infrared Absorption Cells: Standard configuration includes three independent absorption cells (two carbon channels and one sulfur channel). As an option, the system can be upgraded to four independent channels (two carbon and two sulfur) for extended detection capabilities.
- Detector: German-manufactured pyroelectric solid-state infrared detector for high sensitivity and long-term stability.
- Dynamo: Swiss-made synchronous dynamo for consistent and reliable performance.
- Light Source: US-manufactured infrared source with anti-oxidation properties for stable optical output.
- Constant Temperature Control: Thermostatic chamber ensures consistent detection accuracy.
- Shielding Gas System: Oxygen is used to protect and purify both the infrared light source and detector, isolating them from ambient atmosphere. This enhances analytical stability and improves accuracy.
The analyzer is equipped with a high-precision infrared detection system designed for reliable carbon and sulfur analysis.
Typical Data (tube furnace):
| Name of the Specimen and Content of Carbon and Sulfur: C61.46; S4.34 | ||
| Specimen ID | Carbon Mass Fraction | Sulfur Mass Fraction |
| 1 | 61.486 | 4.410 |
| 2 | 61.286 | 4.385 |
| 3 | 61.506 | 4.435 |
| 4 | 61.518 | 4.293 |
| 5 | 61.471 | 4.354 |
Software Interface:
|
Model |
QT-CSA-3500 |
QT-CSA-3500G |
|
Analysis Range |
High-frequency induction furnace (500mg sample):
Note: Changing the sample size can extend the analysis range up to 100%
High sulfur absorption pools channel can be customized according to customer needs |
High Frequency Induction Furnace(500mg Sample):
Tubular Resistance Furnace(500mg Sample):
Note: The measurement range can be changed by changing the measurement quantity.
The number of detection cells and sizes can be determined in accordance with the content of carbon and sulfur in specimens of users |
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Analysis Accuracy |
High-frequency induction furnace:
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High-Frequency Induction Furnace:
Tubular Resistance Furnace:
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| Sensitivity |
0.01ppm |
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Analysis Time |
40 ~ 60 seconds |
High-Frequency Induction Furnace:
Tubular Resistance Furnace:
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| Sample Quality |
Recommended sample weight:
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High-Frequency Induction Furnace:
Tubular Resistance Furnace:
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Combustion Furnace |
High-frequency induction furnace:
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High-Frequency Induction Furnace:
Tubular Resistance Furnace:
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Dust cleaning |
The dust in the combustion tube of the high frequency induction furnace is wiped off automatically |
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| Detector | Solid-state pyroelectric detector | |
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Carrier Gas |
Oxygen purity: ≥ 99.5%; 0.2-0.4Mpa
|
Oxygen 99.5%, 3L/min |
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Power Gas |
Nitrogen (industrial grade) |
Nitrogen or Compressed Air |
| Power Supply |
Power Supply of the Analyzer:
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Power Supply of the Analyzer:
Power Supply of the Resistance Furnace:
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Weight |
Approximately 100kg |
High-Frequency Induction Furnace:
Tubular Resistance Furnace:
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| Dimensions (width × depth × height) |
55 × 76 × 77 (cm) |
The Analyzer:
Resistance Furnace:
Resolution of the Electronic Balance:
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| Chemical Reagent | Magnesium perchlorate,CO2 absorbent | |
