Carbon/Sulfur Analyzer (Tubular Electric Resistance Heating Furnace Model)

The EMIA-Step Carbon/Sulfur Analyzer, which uses a tubular electric resistance heating furnace, offers highly accurate and sensitive analysis. Its variable heating temperature (up to 1450°C)  function allows for quantitative analysis by separating it by temperature or humidity as well as whole quantity analysis.

* For samples which is difficult to burn (e.g. ceramics, Ti alloys, etc), we also offer the EMIA-Pro (Entry model) and EMIA-Expert (Flagship High-Accuracy Model).

Segment: Scientific
Manufacturing Company: HORIBA, Ltd.

Greater Accuracy

Proven NDIR Gas Detection Technology

The EMIA-Step Carbon/Sulfur Analyzer uses the infrared method to measure Carbon and Sulfur after combustion in an electric resistance furnace. With HORIBA’s renowned Non-Dispersive Infrared (NDIR) measurement capabilities, it can detect carbon ranging from 0.0003 to 6.0% (m/m) and sulfur ranging from 0.0004 to 1.0% (m/m). The analyzer is also equipped with a unique CO detector and can be used for a wide range of inorganic materials, including steel, cokes, catalysts, non-ferrous alloys like aluminum, and lithium-ion battery materials.

Please also refer the Measurement Principle page for the details.


Temperature Control Function

The combustion furnace of the analyzer utilizes a distinctive sealed system, which facilitates efficient combustion of flame-retardant samples through high-pressure oxygenation. The system offers excellent temperature stability, ensuring consistent performance across low and high temperatures. This broadens the range of applications to samples containing substances that are easily decomposed and burned at low temperatures. The decomposition combustion of organic and inorganic matter can be easily observed.

Temperature rise control from 300 °C to 900 °C


Improved Measurement and Maintenance Efficiency

New dust-filter provides easy maintenance capability

The EMIA-Step features a dust-filter mechanism that has been proven effective in high frequency induction heating models. The filter unit collects dust generated by high-temperature combustion to prevent it from adhering to the piping after the combustion furnace. This reduces the adsorption of CO2 and SO2 gases by dust and ensures highly accurate and sensitive analyses.

Schematic of tubular electric resistance heating furnace


High Throughput

The EMIA Series can complete one measurement cycle, measurement-display result-cleaning, in 70 seconds (i.e. about 50 samples/hour).


Gas Collection Mode

Our exclusive furnace features a closed structure that enables efficient combustion under high-pressure oxygen and allows for the burning of high melting point materials. This unique furnace design allows Gas Collection analysis, in which small amounts of gases are captured within the furnace and then transferred to the detector for analysis.


More Intuitive Software for Easy Operation

Advanced Operation Software

The EMIA Series features its own proprietary operating software, which has been designed with a focus on ease of use, optimizing layout, operating menus, and functions for enhanced user-friendliness.

Enhanced Operator Assistance

Additionally, the software includes a self-diagnostic monitoring feature to assess the status of connected devices, an alarm function, and three navigators to recommend the most suitable conditions for samples, troubleshoot errors, and alert users to perform maintenance. These features improve daily operation and ensure efficient analysis.

Compliance with ISO/ASTM Standards

TestMethods Title Carbon Sulfur
ISO/TR 15349-3:1998 Unalloyed steel — Determination of low carbon content — Part 3: Infrared absorption method after combustion in an electric resistance furnace (with preheating)
ASTM E 1019-18 Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques
ASTM E 1587-17 Standard Test Methods for Chemical Analysis of Refined Nickel
ASTM E 1941-10 (2016) Standard Test Method for Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion Analysis
ASTM E 1915-20 Standard Test Methods for Analysis of Metal Bearing Ores and Related Materials for Carbon, Sulfur, and Acid-Base Characteristics
ASTM E 1552-16e Standard Test Method for Sulfur in Petroleum Products by High Temperature Combustion and Infrared (IR) Detection or Thermal Conductivity Detection (TCD)
ASTM E 4239-18e1 Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion
ASTM E 5016-16 Standard Test Method for Total Sulfur in Coal and Coke Combustion Residues Using a High-Temperature Tube Furnace Combustion Method with Infrared Absorption
ASTM E 1619-16a Standard Test Methods for Carbon Black—Sulfur Content
Detection method NDIR (Non-Dispersive InfraRed)
Required sample amount 1.00 ± 0.10 g
Minimum reading 0.000001% (m/m) for both Carbon and Sulfur
Carbon Measurement range 0.0003 〜 6.0% (m/m)
Accuracy (Repeatability) σn-1 ≦ 0.00015% (m/m) or RSD ≦ 0.75%
Sulfur Measurement range 0.0004 〜 1.0%(m/m)
Accuracy (Repeatability) σn-1  ≦ 0.00020% (m/m) or RSD ≦ 2.00%
Setting temperature range 0 (room temperature) – 1450℃
Dimensions [ W x D x H ] Combustion unit: 443 × 725 × 710 mm
Measurement unit : 271 × 725 × 710 mm
Mass Combustion unit: 77 kg,  Measurement unit : 53 kg
Power 200/220/240 V, 5 kVA *Excluding peripheral devices
Carrier gas Oxygen: Purity 99.5%, Pressure: 0.30〜0.33 MPa
Operation gas Nitrogen: Purity 99.5%, Pressure: 0.35〜0.38 MPa
*Dry air excluding moisture and oil content can be used as the operation gas
only for the standard model
Data processing and operation PC with Windows® 10
User interface Touch panel/Keyboard/Mouse

* Windows is a registered trademark or trademark of Microsoft Corporation in the United States and/or
other countries.

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