Eltra brand was estabilished in 1980 in German, mainly focusing on research and development of elemental analyzer. It has been extended to the oxygen nitrogen hydrogen analyzer from the beginning of carbon sulfur analyzer, which is wild about research and manufacturing of analyzer. Nowadays, Eltra has become the leader on the area of elemental analyzer, which is mainly applied in steel, mining, automotive, aviation, coal, building materials, and universities and research institutes. This brand developed a resistance furnace carbon sulfur analyzer with Siemens in 1981, which was first sold in Germany in 1984. In 1988, Eltra researched and developed induction furnace carbon sulfur analyzer, expanding the international market and improving the instruments and technology for many years.

Eltra carbon sulfur analyzer can detect the content of iron, copper, alloys, ores, cement, ceramics, carbon compounds, minerals, sand, glass and other solid materials quickly and accurately. Carbon sulfur analyzer of this brand mainly consists of 16-bit microprocessor, a separate induction furnace and four Infrared detecting pools which are used to detect high and low carbon and sulfur respectively. In the detection process, this instrument can automatically switch the low range and high range of detection. The CS-800 carbon sulfur analyzer of Eltra usually adopt tungsten granule as its flux, and it has a high sensitivity, good performance, wide measurement range, and accurate analysis results, etc. There is a more special characteristic, when the detection analysis, the instrument can display its working status real time to ensure the analysis can be done simply and reliably. In addition, detection time of this type of carbon sulfur analyzer is only 40-50 seconds, which costs less time to finish the determination, and it generally use magnesium perchlorate and alkali asbestos as chemical reagent.

ELTRA is one of the world's leading manufacturers of elemental analyzers for rapid and accurate analysis of solid materials. The carbon / sulfur analyzer CS-800 is equipped with up to four independent infrared (IR) cells which allow for precise simultaneous analysis of high and low carbon and sulfur concentrations in one measurement. The sensitivity of the cells can be customized individually by selecting the length of the IR path to ensure the optimum measuring properties for each application.

Labfit brand was established in 1992, which is an Australian-owned manufacturer of commercial grade laboratory equipment in the soil testing and carbon sulphur analysis industry. Labfit carbon sulfur analyzer is a famous Australian brand, which has many excellent technical staff that has rich experiences with solid theoretical foundation in Australia, won the trust and praise of majority of users. It possesses advanced analysis, testing, testing equipment, the main application areas include petroleum, coal, materials, universities, chemical, metallurgy, environmental protection, food and agriculture and others.

Its CS1232 infrared carbon sulfur analyzer enjoys a great popularity in the world. The type of Labfit carbon sulfur analyzer uses the latest solid-state infrared absorption detection technology with high measurement accuracy. The application of vertical furnace, make the temperature can be controlled at the set value of 1%, which can reduce the chances of rupturing of a ceramic tube. Its user interface is intuitive and easy to be understood. When the analysis of the measurement, the measuring system will automatically select the appropriate sulfur measurement unit by using the 48-bit sample injector.

Width of CS1232 infrared carbon sulfur analyzer is 76 cm, its depth is 66 cm with a height of 93 cm. It weighs about 90 kg. The detection method is using a solid-state infrared absorption. Vertical resistance furnace, using a cylindrical silicon carbide to heat elements, in order to ensure uniform temperature distribution. Use two magnesium perchlorates as drying tower, and adopt a glass wool as a filter. The carrier gas is 99.5% of pure oxygen, pneumatic gas is dry and clean compressed air, the flow of oxygen should be controlled at 3l per minute. Double purification system is used to prevent gas from entering inside the combustion tube, avoiding unnecessary industrial accidents. Using a non-porous ceramic crucible, tungsten granule is the main flux. Analyzed data including time / date, name of samples, description, number of samples, weight of samples, dial number, analyzing data, analyzing curve, analyzing time, and other standard values. However, the analysis would take long time to finish the determination, which requires 60-180 seconds. It is easy to operate air filter dust collectors and centrifugal sampling tube whose material is very strong, and it can withstand daily use. It is portable equipment with a simple appearance, with a simple keyboard to input flow calibration value.