Versatile CHN Analyzer for Environmental Applications

The Model 440 Elemental Analyzer from Exeter Analytical is capable of precisely analyzing the widest range of environmental sample types for percentage levels of carbon, hydrogen and nitrogen - quickly, easily and reliably.

Its unique horizontal furnace design, allowing for removal of residues between runs, prevents cross contamination and enables in excess of 1000 samples to be run between combustion tube changes. Effectively eliminating troublesome residue build-up the gas flow characteristics of the Model 440 analyzer are superior to other elemental analysers thereby also providing longer-term calibration stability as well as enhanced accuracy and precision for measured sample data.

Beneficially the Model 440 provides the capacity to process air and water monitoring filters up to 50mm in diameter in one analytical cycle.  By comparison other elemental analysers, employing vertical furnace designs, require larger filters to be sub sampled several times and then corrective calculations made to enable analysis.

As the Model 440 provides complete control over combustion parameters it is able to reproducibly achieve 100% combustion with the widest range of sediment samples. For sediment samples with low levels of Nitrogen in the 0.1-0.2% range, proprietary Nitrogen analysis software uniquely enables accurate measurement at these levels with a high degree of accuracy.

Traditional methodologies for determining CHN content of soil, plant and insect samples typically use macro-CHN or Kjehldahl Nitrogen analysis. While both these techniques are proven to generate useful data, both have drawbacks. Macro-CHN analysers are relatively expensive to purchase and run compared to micro-CHN systems and Kjehldahl requires use of highly corrosive and toxic chemicals. Using a Model 440 elemental analyzer several leading crop research institutes are routinely able to accurately and precisely determine the CHN content of a wide range of soil, plant and insect materials using samples sizes of typically 2 - 20mg.

Low gas and reagent consumption combined with high reduction tube life allows the Model 440 to deliver some of the lowest operating costs of any CHN elemental analyzer available. Intuitive Windows based operating software reduces human errors through incorporation of extensive automation, comprehensive customer help and diagnostic facilities.  Most parts on the Model 440 are user replaceable further reducing operating costs and downtime.

As a company dedicated to elemental microanalysis, Exeter Analytical's 25+ years of involvement with instruments, consumables and supplies has allowed them to better understand the whole problem facing microanalysts.  As a consequence whether you are a regular or an occasional purchaser - experienced and knowledgeable staff are always available to provide free informed advice.

For further information on environmental analysis using the Model 440 CHN Elemental Analyzer please contact Exeter Analytical on +44-2476-323223 (Europe / Asia), +1-978-251-1411 (North America / ROW) or email info@exeteranalytical.co.uk.