Carbon / Water Analyzer CW‑800

Determination of released carbon dioxide and water is a special requirement for quality control in the cement and lime industry. ELTRA’s CW-800 analyzer is designed for the precise, simultaneous determination of carbon dioxide and water in lime, gypsum and cement from trace level up to 100 % (depending on sample weight). Other sample materials include ores, soil and minerals.

The CW-800 is equipped with a resistance furnace with quartz tube for sample oxidation and can provide temperatures up to 1000 °C. The temperature of the CW-800 can be set up in steps of 1 °C and the temperature is fixed during measurement. As common carrier gas in the CW-800 nitrogen is used.

The detection system of ELTRA’s CW-800 is very sensitive, reliable and guarantees a long lifetime. It can be customized according to the user’s requirements. Two infrared cells can be combined independently and allow highly precise measurement of CO2 and H2O.

Application Examples

gypsum, cement, limestone, minerals, ores, soil

Product Advantages

Simultaneous carbon dioxide and water determination with minimal sample preparation
Rapid, precise, accurate and reliable element determination
Wide range of materials can be analyzed
Resistance furnace temperature can be set up to 1000 °C in steps of 1 °C
Customized infrared cells provide wide, dynamic measuring range
Due to gold IR path, increased cell life time for analysis of halogen or acid containing samples
Powerful software (multilingual, customized display, export of results)
Single and multipoint calibration
No halogen trap required
Electronic gas flow control
Low maintenance
Robust design allows usage in production control and laboratory

Carbon / Water Analyzer CW-800 Technical Data

Measured elements	carbon dioxide, water
Furnace alignment	horizontal
Sample carrier	quartz boats
Field of application	construction materials, environment / recycling, geology / mining
Furnace	resistance furnace with quartz tube, adjustable up to 1000 °C
Process of measurement	fixed temperature, fixed carrier gas, no changing during measurement
Detection method	solid state infrared absorption
Number of IR cells	1 - 2
Material of IR path	gold
Typical analysis time	2 - 3 min
Chemicals required	magnesium perchlorate, sodium hydroxide
Gas required	nitrogen 99.995 % pure (2 - 4 bar / 30 - 60 psi)
Power requirements	230 V, 50/60 Hz, max. 10 A, 2300 W
Dimensions (W x H x D)	55 x 80 x 60 cm
Weight	~ 65 kg
Required equipment	PC, monitor, balance (resolution 0.0001g)
Optional accessories	voltage stabilizer 5 KVA

Functional Principle

Operation of the CW-800 analyzer is simple and convenient. The temperature of the CW-800 is set up to defined temperature up to 1000°C. After weighing the sample in a quartz boat, it is placed on the loading mechanism of the furnace. In the following, the analysis can be started and the boat is introduced into the furnace by the user. Depending on the applied temperature, residual or crystallization water and CO₂ (from CaCO₃) is released from the sample and determined by the infrared cells.

All data processing, control of the combustion process and calculating of the result is done by an external PC. The simultaneous determination of carbon dioxide and water only takes about 2 to 3 minutes.

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