The DEFOR is an extractive UV gas analyzer for simultaneous measurement of up to three components. It is a specialist for extremely selective NO-measurements of small ranges. It is a generalist for many UV-active gases like SO2, NO2, Cl2, NH3, CS2, H2S and COS. It shows no cross-sensitivities to CO2 and H2O due to the used spectral range. The innovative signal processing as well as the highly stable detectors provide an outstandingly longterm stability and allow the compensation of drifts and other effects. The state-of-the-art electronics and software provide the required interfaces for remote control via networks and integration into process control systems.

• Cl2-measurement, also in combination with O2
• Measurement of sulfur compound in process gases
• NO, NO2 and NH3 measurement in nitric acid synthesis
• H2S and SO2 measurement in sulfur recovery plants
• Measurement of high H2S concentrations in reactive and acidic gases
• Measurement of H2 in Cl2 or vice versa