Carbon & Sulfur Analyzer – QualiCSA™ 3
Available Carbon & Sulfur Analyzer Models
Carbon & Sulfur Analyzer – QualiCSA™ 3 Applications
High-Frequency Infrared Carbon & Sulfur Analyzer – QualiCSA™ 3
The QualiCSA™ 3 Carbon & Sulfur Analyzer is designed for rapid carbon and sulfur analysis using high-frequency induction heating, infrared detection, advanced combustion technology, and full-range detection capabilities. The system provides simultaneous measurement of carbon and sulfur concentrations in a broad range of solid materials.
The QualiCSA™ 3 is suitable for laboratories and testing applications across steel, powder metallurgy, non-ferrous metals, magnetic materials, new energy materials, third-party testing, research institutes, and other industrial sectors. It can analyze carbon and sulfur in steel and alloys, non-ferrous metals, powder metallurgy materials, rare earth materials, NdFeB, ores, and other solid samples.
A stable, high-efficiency high-frequency power system supports complete sample combustion for reliable analysis. The analyzer also incorporates effective shielding against high-frequency interference to support consistent analytical performance and measurement stability.
Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer – QualiCSA™ 3G
The QualiCSA™ 3G Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer combines high-frequency induction heating and tubular resistance furnace technology to accommodate a wider range of sample types and analytical requirements.
The instrument features two sample pretreatment and combustion systems: a high-frequency induction furnace and a tubular resistance furnace. Both furnace systems use the same infrared detection system to measure the carbon- and sulfur-containing gases generated during combustion. Switching between the two furnace systems is straightforward, allowing the analyzer to support different testing methods and sample characteristics.
The QualiCSA™ 3G is suitable for carbon and sulfur analysis across a diverse range of solid materials, including steel, cast iron, alloys, metal ores, ceramics, cement, lime, rubber, coal, coke, refractory materials, carbide, graphite, oil, catalysts, soil, and other materials.
With dual furnace capabilities and a shared infrared detection platform, the QualiCSA™ 3G Carbon & Sulfur Analyzer provides a flexible solution for laboratories requiring carbon and sulfur analysis across varied sample types and testing applications.
Features of the High-Frequency Infrared Carbon & Sulfur Analyzer – QualiCSA™ 3
Modular Instrument Configuration
-
Infrared Detection Unit: Supports up to four independent infrared detection channels, with a high-sulfur channel available according to application requirements. The system uses pyroelectric solid-state infrared detectors.
-
Motor: A synchronous motor supports continuous analyzer operation with dependable performance.
-
Infrared Light Source: The infrared source provides stable optical performance and resistance to oxidation.
-
Temperature Control: The IR cell temperature is continuously maintained at a stable level to support measurement accuracy.
-
Copper Oxide Catalysis Furnace (Optional): Converts trace CO to CO₂ for complete carbon detection. It also converts SO₂ to SO₃, which is absorbed by cotton to help reduce emissions.
Instrument Self-Check and Gas Management
-
Stable Flow Control: High-precision differential-pressure electronic flow control technology provides consistent analysis gas flow.
-
Gas-Saving Mode: Oxygen flow automatically stops when an analysis cycle is complete, helping reduce oxygen consumption.
User-Friendly Analysis Software
The QualiCSA™ 3 includes English-language operating software compatible with Windows 10 and Windows 11. The software is designed for straightforward operation and supports free software updates.
Flexible Sample Weight Input
The system provides multiple options for entering or obtaining specimen weight values:
-
Automatic weight reading
-
Manual weight reading
-
Manual weight entry
-
Automatic crucible tare
Automatic Range Switching
The analyzer automatically switches between high and low carbon and sulfur measurement ranges according to the concentration detected.
Automatic Flux Blank Deduction
The software automatically deducts the flux blank value during analysis to support accurate measurement results.
Comprehensive Data and System Display
The software provides access to:
-
Release curve comparison and storage
-
Analytical result statistics
-
Quick data searches
-
Maintenance reminders
-
Monitoring of key instrument parameters
Additional Diagnostic Checks
Solenoid Valve Check:
Displays the operating status of individual solenoid valves and allows each valve to be operated independently.
Signal Acquisition Check:
Monitors the acquisition signals throughout the analyzer system.
High-Frequency Status Check:
Provides high-frequency furnace preheating countdown information.
Baseline Check:
Provides real-time monitoring of the baseline for each infrared detection channel.
Automatic Zero Check:
Software-controlled automatic baseline zeroing helps maintain stable detection conditions.
Features of the Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer – QualiCSA™ 3G
The QualiCSA™ 3G Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer combines high-frequency induction combustion and tubular resistance furnace technology with infrared gas detection for carbon and sulfur analysis across a broad range of solid materials.
Key Features
-
Germany-produced solid-state infrared detector components
-
Flexible heating power control
-
Full manual operating mode
-
Advanced infrared thermostatic technology
-
High-precision gas flow control
-
Dedicated computer operating software
-
Advanced linear signal processing
-
High analytical precision
-
Reliable electronic circuit components
-
Comprehensive self-diagnostic functions
-
Multiple circuit protection systems
-
Fully enclosed gas channel design with zero dead volume
Infrared absorption following high-frequency combustion or tubular furnace combustion enables rapid analysis of carbon and sulfur concentrations in solid inorganic materials.
Software Functions
The QualiCSA™ 3G software provides comprehensive instrument control and data management functions, including:
-
Monitoring solenoid valve movement throughout the gas channels
-
Detection and adjustment of infrared signals
-
Rapid display of analytical results and release curves
-
Automatic storage of analytical results
-
Generation and storage of dynamic release curves
-
Automatic specimen weight reading
-
Manual specimen weight entry when required
-
Automatic switching between high-carbon, low-carbon, and sulfur detection channels
Data Processing and Analysis
The software supports multiple approaches for reviewing and processing analytical data:
-
Data retrieval by date or specimen ID
-
Data screening and filtering
-
Statistical processing, including mean, standard deviation, and relative deviation
-
Comparison of analytical signals with stored release curves
High-Precision Flow Control
The analyzer uses high-precision electronic flow control technology with an Anti-Overshoot System to provide precise control of the analysis gas flow during measurement.
Catalytic Oxidation in the Copper Furnace
Before entering the carbon detection cell, the analysis gas passes through the copper furnace for catalytic oxidation. This process converts CO into CO₂, supporting detection of the carbon-containing gases generated during combustion.
The copper furnace also converts analyzed SO₂ into SO₃, which is subsequently absorbed to help reduce air emissions.
Automatic Dust Filtration
A specialized dust filter made from powder metallurgy materials removes particulate matter from the analysis gas. The filter is automatically cleaned twice during each analysis cycle.
Automatic Self-Check and Diagnostics
The QualiCSA™ 3G provides comprehensive self-checking functions to monitor key operating conditions, including:
-
Overall oxygen pressure at the furnace inlet
-
Analysis pressure at the rear of the furnace
-
Dynamic gas pressure
-
High-frequency furnace on/off status
-
Cleaning device reset status within the high-frequency furnace
-
Infrared signal monitoring and adjustment
-
Solenoid valve movement throughout the gas channels
The software provides step-by-step diagnostic functions, allowing individual components and systems to be checked as needed.
Electronic Specimen Weighing
An electronic balance can be connected directly to the computer for accurate specimen weighing. The measured weight is automatically transferred to the analysis software. Manual specimen weight entry is also available when required.
Typical Analysis Time
Crucible and Combustion Vessel
High-Frequency Induction Furnace:
-
Ceramic crucible
-
Diameter: 25 mm
-
Height: 27 mm
Tubular Resistance Furnace:
Combustion Furnace Specifications
High-Frequency Induction Furnace:
-
Frequency: 18 MHz
-
Maximum power: 2.7 kVA
Tubular Resistance Furnace:
-
Maximum temperature: 1550°C
-
Maximum power: 4.4 kW
-
Carborundum heating elements
-
Controlled heating power to support extended element life
-
Furnace case reaches operating temperature in approximately 20 minutes
Crucible Pre-Treatment
The ceramic crucible used with the high-frequency induction furnace can be pre-treated in the tubular resistance furnace. This dual-purpose configuration improves workflow efficiency while supporting consistent and reliable carbon and sulfur analysis.
Theory and Method
Instrument Principle – QualiCSA™ 3G Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer
The QualiCSA™ 3G Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer uses infrared absorption analysis following high-temperature combustion. Depending on the specimen and testing requirements, users can select either the tubular resistance furnace or high-frequency induction furnace as the specimen treatment and combustion unit.
After gas purification, oxygen is introduced into the selected combustion furnace as the carrier gas. The specimen undergoes high-temperature oxidation, generating CO₂, CO, and SO₂. The combustion gases then pass through dust removal and dehydration stages before entering the sulfur detection system.
The oxygen and resulting gas mixture subsequently pass through a heated catalytic furnace. During catalytic oxidation, CO is converted to CO₂, while SO₂ is converted to SO₃. After sulfur removal, the gas mixture is directed sequentially through the high-carbon detection cell and low-carbon detection cell for carbon measurement.
After the detection process is complete, the remaining gas is discharged from the analyzer.
The measured carbon and sulfur concentrations are displayed by the analysis software as % C and % S. Analytical results are automatically stored in the system database for convenient future retrieval.
The software can also generate customized analysis reports when required. Reports can be printed through an external printer, supporting laboratory documentation and record keeping.
With its dual combustion furnace configuration, infrared detection technology, automated data processing, and straightforward operation, the QualiCSA™ 3G Carbon & Sulfur Analyzer provides rapid carbon and sulfur analysis for a wide range of solid materials while simplifying routine operation and maintenance.
High-Frequency Infrared Carbon & Sulfur Analyzer – QualiCSA™ 3
Flexible Analytical Parameter Settings
The QualiCSA™ 3 High-Frequency Infrared Carbon & Sulfur Analyzer allows analytical parameters to be adjusted according to the characteristics and requirements of different specimens.
Calibration Methods and Parameters
Calibration methods and analytical parameters can be established and stored separately for different specimen types. The software supports an unlimited number of analytical methods, allowing laboratories to configure testing procedures for a wide range of materials.
Advanced Data Management
The QualiCSA™ 3 includes comprehensive data management functions designed to simplify analytical record keeping, data retrieval, reporting, and laboratory connectivity.
-
Database Storage: Analytical results are stored in a database for flexible data searches and statistical analysis.
-
Customizable Printing: Report and printing columns can be configured according to specific user requirements.
-
Excel Data Export: Current analytical data can be exported directly to Excel from the analysis interface.
-
LIMS Connectivity: Network-based data transmission supports integration with a Laboratory Information Management System (LIMS) for streamlined laboratory data management.
Automatic Cleaning of the High-Frequency Furnace
The QualiCSA™ 3 High-Frequency Infrared Carbon & Sulfur Analyzer features an integrated metal dust filtration system designed for convenient cleaning and efficient furnace operation.
-
Tool-Free Dust Filter Cleaning: The dedicated metal dust filter can be removed and cleaned without specialized tools, simplifying routine maintenance and reducing cleaning time.
-
Automatic Combustion Chamber Cleaning: The combustion chamber is automatically cleaned twice during the analysis process, with dust removed after each analysis cycle.
-
Automatic Filter Back-Blow: The dust filter is automatically back-blown to reduce dust accumulation and maintain effective filtration and adsorption performance.
-
Reduced Maintenance: Automated dust removal helps maintain stable combustion conditions and supports consistent carbon and sulfur analysis over repeated testing cycles.
Infrared Detection Unit
The QualiCSA™ 3 High-Frequency Infrared Carbon & Sulfur Analyzer features a non-dispersive infrared detection system with highly sensitive pyroelectric solid-state infrared detectors for carbon and sulfur analysis. The computer automatically calibrates the infrared cell zero point to support stable and accurate measurement.
-
Non-Dispersive Infrared Detection: High-sensitivity pyroelectric solid-state detectors provide reliable infrared signal measurement for carbon and sulfur analysis.
-
Automatic Zero Calibration: The software automatically calibrates the infrared cell zero point, helping maintain stable baseline conditions during analysis.
-
Three Independent Infrared Channels: The standard QualiCSA™ 3 configuration includes three independent infrared detection channels.
-
Expandable Detection Capacity: The system can be expanded to four independent infrared channels based on application requirements, supporting full-range carbon and sulfur detection.
Automatic Switching Between High and Low Ranges
The CS3500 Carbon & Sulfur Analyzer features advanced electronic flow control technology designed for rapid response and stable analysis gas flow. High-precision electronic flow regulation continuously supports controlled gas flow conditions, helping maintain measurement consistency and analytical accuracy.
The system's responsive flow control contributes to reliable switching and measurement across high and low detection ranges, supporting precise carbon and sulfur analysis across different concentration levels.
Carbon Sulfur Analyzer - QualiCSA™ 3 Working principle:
Structure of the Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer – QualiCSA™ 3G
The QualiCSA™ 3G Dual Combustion Furnace Infrared Carbon & Sulfur Analyzer features a modular instrument design that integrates the major components required for carbon and sulfur analysis. The system configuration includes an electronic balance, computer, printer, high-frequency induction combustion unit, tubular resistance furnace unit, vacuum cleaner, and other supporting modules.
This modular configuration provides a practical setup for laboratories performing carbon and sulfur analysis across different solid sample types.
Infrared Detection System
The QualiCSA™ 3G uses an infrared absorption detection system designed to provide flexible carbon and sulfur measurement according to application requirements.
-
Three-Channel Standard Configuration: The standard configuration includes three independent infrared absorption cells, providing three physical detection channels: two carbon channels and one sulfur channel.
-
Four-Channel Configuration: Based on application requirements, the QualiCSA™ 3G can be configured with four independent infrared absorption cells, providing two carbon channels and two sulfur channels for expanded detection capability.
-
Pyroelectric Infrared Detector: The analyzer uses a German-produced pyroelectric solid-state infrared detector for sensitive infrared signal detection.
-
Synchronous Motor: A Swiss-produced synchronous motor provides stable operation of the infrared detection system.
-
Infrared Light Source: A stable, oxidation-resistant infrared light source produced in the United States supports consistent optical performance.
-
Constant-Temperature Control: The entire infrared detection chamber is thermostatically controlled to maintain a stable analysis temperature, supporting measurement accuracy and detection stability.
-
Oxygen Shielding Gas: Oxygen is used to protect and purify the infrared light source and detector by isolating these components from the surrounding atmosphere. This helps improve analytical stability and detection accuracy.
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:
Main analysis Window
Method window
Carbon & Sulfur Analyzer – QualiCSA™ 3 Technical Specification
Carbon Sulfur Analyzer QualiCSA™ 3 and QualiCSA™ 3G Technical Specifications:
| Model |
QualiCSA™ 3 |
QualiCSA™ 3G |
| Analysis Range |
High-frequency induction furnace (500mg sample):
- LC: 1ppm~0.1%
- HC: 0.1%~5%
- LS: 1ppm~0.3%
- HS (150mg sample): 0.3%~30%
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):
- LC: 1ppm - 0.1%
- HC: 0.1%～5%
- LS: 1ppm - 0.3%
- HS (150mg Sample): 0.3%～ 30%
Tubular Resistance Furnace(500mg Sample):
- C: 0.01% ~20%
- S: 0.005% ~20%
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
|
| |
|
|
| |
|
| |
|
|
| Analysis Accuracy |
High-frequency induction furnace:
- LC: 1ppm or RSD ≤ 1%
- HC: RSD ≤ 0.5%
- LS: 1.5ppm or RSD ≤ 1.5%
- HS: RSD ≤ 1.5%
|
High-Frequency Induction Furnace:
- LC: 1ppm or RSD≤1%
- HC: RSD≤0.5%
- LS: 1.5ppm or RSD≤1.5%
- HS: RSD≤1.5%
Tubular Resistance Furnace:
- LC: RSD≤1%
- HC: RSD≤0.5%
- LS: RSD≤1.5%
- HS: RSD≤1.5%
|
| Sensitivity |
0.01ppm |
| Analysis Time |
40 ~ 60 seconds |
High-Frequency Induction Furnace:
- 40-60 seconds Tubular Resistance Furnace:
- 150-300 seconds
|
| Sample Quality |
Recommended sample weight:
- 0.1g to 0.5g, can be adjusted based on carbon and sulfur content
|
High-Frequency Induction Furnace:
- 0.1g-0.5g Tubular Resistance Furnace:
- 300mg/coal(typical value)
|
| Combustion Furnace |
High-frequency induction furnace:
|
High-Frequency Induction Furnace:
Tubular Resistance Furnace:
- Max.20A,Max.1550 ℃, the temperature can be adjusted continuously
|
| Dust cleaning |
The dust in the combustion tube of the high frequency induction furnace is wiped off automatically |
| Detector |
Solid-state pyroelectric detector |
| Carrier Gas |
Oxygen purity: ≥ 99.5%; 0.2-0.4Mpa |
Oxygen 99.5%, 3L/min |
| Power Gas |
Nitrogen (industrial grade) |
Nitrogen or Compressed Air |
| Voltage |
Power Supply of the Analyzer:
- 220VAC±10% 50±1Hz 16A (110V is also available)
|
Power Supply of the Analyzer:
- 220VAC ±10%,50±1Hz,16A (110V is also available)
Power Supply of the Resistance Furnace:
- 220VAC ±10%, 50±1Hz, 20A (110V is also available)
|
| Weight |
Approximately 100kg |
High-Frequency Induction Furnace:
Tubular Resistance Furnace:
|
| Dimensions (width × depth × height) |
55 × 76 × 77 cm |
The Analyzer:
Resistance Furnace:
Resolution of the Electronic Balance:
|
| Chemical Reagent |
|
Magnesium perchlorate, CO2 absorbent |
