Carbon/Sulfur Analyzer ELEMENTRAC CS-i

The new carbon/sulfur analyzer ELEMENTRAC CS-i has been developed for the safe and accurate analysis of carbon and sulfur in inorganic samples. The analyzer is available with a powerful induction furnace for sample combustion.

Up to four highly sensitive infrared (IR) cells allow the analyzer to determine both low and high carbon and sulfur concentrations in just one measurement run. The measuring range of every single cell may be adapted to the user's particular requirements in order to ensure optimum measuring conditions for all applications.

The analyzer is available with the new comprehensive and convenient ELEMENTS software, which features groupings, reports, statistics, diagnosis tools and a number of additional functions for ELEMENTRAC analyzers.

Application Examples

Carbides, cast iron, cement, alloys, ceramics, copper, glass, iron, ores, refractory metals, sand, steel, minerals, titanium, ...

Product Advantages

  • Simultaneous carbon and sulfur determination with minimal sample preparation
  • Extensive range of inorganic materials can be examined
  • Freely selectable configuration of each IR cell
  • Optional gold IR path for analysis of acid or halogen containing samples
  • Control of induction performance offers more precise analysis of samples with low melting temperature
  • Powerful (2.2 kW) induction furnace for temperatures above 2,000 °C
  • NEW: automatic vacuum cleaning system guarantees higher measurement precision and stability
  • Heated and effortlessly accessible dust trap permits improved sulfur detection
  • Optimized catalyst reactor permits more accurate carbon detection
  • NEW: ELEMENTS software with comprehensive analysis and diagnosis tools (supporting data and application export, comment fields, and many more)
  • Multipoint and single calibration
  • Low maintenance
  • Robust design permits usage in production control and laboratory


Measured elements carbon, sulfur
Samples inorganic
Furnace alignment vertical
Sample carrier ceramic crucibles
Field of application construction materials, engineering / electronics, geology / mining, glass / ceramics, steel / metallurgy
Furnace induction furnace, above 2,000 °C
Detection method solid state infrared absorption
Number of IR cells 1 - 4
Material of IR path aluminum (optional gold)
Typical analysis time 40 seconds (nominal)
Chemicals required magnesium perchlorate, platinum-based catalyst, sodium hydroxide
Gas required compressed air (4 bar/ 60 psi)
oxygen 99.5% pure (2 - 4 bar / 30 - 60 psi)
Power requirements 230 V, 50/60 Hz, max. 15 A, 3450 W
Dimensions (W x H x D) 52 x 84 x 75 cm
Weight ~ 150 kg
Required equipment balance (resolution 0.0001 g), monitor, PC
Optional accessories Autoloader (for 36 or 130 crucibles), carrier gas purification, halogen trap, HTF-540 pre-heating furnace, voltage stabilizer 5 KVA

Function Principle

Carbon / Sulfur Analyzer CS-i: Operation

Operating the CS-i is safe and simple. After the sample is weighed in a ceramic crucible, the weight is then transferred from the interfaced balance to the PC. If needed, sample weights can also be manually entered. Then an accelerator (such as tungsten or iron) is added and, after having placed the crucible on the pedestal, the analysis begins. The analysis time is 40 to 50 seconds.

The instrument parameters and detector signals are displayed during analysis. Evaluation of the signals and display of the results are performed automatically; it is possible to transfer the data to a laboratory information management system (LIMS). The CS-i needs minimum maintenance. The particle chemicals and filters which need to be maintained are effortlessly accessible.

Carbon/Sulfur Analyzer CS-i: Measuring Principle

In the induction furnace, the sample is melted in a pure oxygen atmosphere, and this causes sulfur to react to sulfur dioxide (SO2) and carbon to a mixture of carbon dioxide (CO2) and carbon monoxide (CO). The combustion gases pass through a moisture absorber and dust filter for purification. In the next step, the sulfur dioxide is identified in infrared cells. In the CS-i, infrared cells with varied sensitivities (high/low) can be adapted based on the user’s requirements.

Oxidation of both, sulfur dioxide to sulfur trioxide and carbon monoxide to carbon dioxide follow the sulfur measurement. The SO3 gas is removed with the help of cellulose wool; the carbon content is then detected by infrared cells which can be separately customized. The ELTRA CS-i analyzer can be provided with up to four separate infrared cells.

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