LECO S144DR Carbon Sulfur Analyzer and Tungsten Granule

Tungsten granule is considered as flux of LECO S144DR carbon sulfur analyzer which plays an important role in enhancing liquid flow, controlling the temperature of combustion oxidation while analyzing carbon and sulfur. Generally, its shape is fine stuff with a size of 0.4-0.8μm. Tungsten granule accelerates the combustion reaction of inorganic material which has the function in light the fire, combustion-supporting. It can also melt of the oxidizing material of the sample’s surface to make flux have a good fluidity, which is conducive to oxidize the carbon and sulfur of the sample in a short time. Compared to CS230, the greatest different is that S144DR is a tube furnace which belongs to external heating, its sample is burned in a high-temperature tube furnace. CS230 is a high-frequency heating furnace, high-frequency furnace using a metal sample to generate eddy current in a high frequency producing CO₂ and SO₂ in oxygen.

LECO S144DR carbon sulfur analyzer mainly uses a size 0.7-1.2μm of magnesium perchlorate as a desiccant, and glass wool is used for filtering dust. Purity of oxygen should reach above 99.5% whose outlet pressure is 0.26MPa. Its basic structure consists of a tube furnace, infrared absorption system, purification system, constant-temperature system, gas system, steady flow systems, and data processing and control system. Melting and combustion of the sample is mainly carried out in a tube furnace. Infrared absorption system is used for measuring SO₂, the purification system is used for purifying carrier gas and the reaction gas to remove its dust, impurities and moisture. Thermostat system allows temperature of measured gas and the detector cell keep constant. The reaction gas is offered by the gas system. Steady flow system is mainly to control the flow of the carrier gas, the main data processing and control system is to control of the instrument and calculate sulfur content.

Operational principle of this type of analyzer is first to weighing a certain quality of the sample into the flow of oxygen, combusting in a high-temperature furnace, sulfur is converted to sulfur dioxide, flowing with oxygen through the infrared absorption cell, and detect the sulfur.

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