H2S analyser Defor

H2S analyser Defor

DEFOR is an extractive UV gas analyzer that can simultaneously measure up to three measuring components. It is a specialist for extremely selective NO measurement with small measuring ranges and an allrounder for many other UV-active gases, e.g. SO2, NO2, Cl2, NH3, CS2, H2S and COS. Cross-sensitivities to CO2 and H2O do not exist because of the spectral range used. Innovative signal processing as well as highly stable detectors provide excellent long-term stability and compensation of drifts and influencing effects. DEFOR with stateof- the-art electronics and software has the interfaces required for remote monitoring from a network as well as to the connection to process control systems.

Measuring principle The DEFOR process photometer operates according to the principle of absorption in the ultraviolet radiation range. NO-specific as well as other wideband radiation fractions are emitted from an electrode-less discharge lamp in the ultraviolet spectral range. The radiation spectrum, required for measurement and reference of the respective gas component, is generated in the filter wheel unit by one or two revolving filter wheels. For NO measurement, DEFOR uses the gas filter correlation where the radiation spectrum for measurement and reference is separated by a cyclic swiveling in of an NO gas filter. For all other gases, interference filter correlation is used.