Aabspec has developed the #CXS, a new version of their #CXX transmission FT-IR cell. The #CXS keeps the features of the #CXX including ultra-low internal volume, a flow path ensuring that the reactive gases first strike the catalyst where it is exposed to the optical beam, temperatures to 800 °C etc. External surfaces are water cooled. The mounting system supplied by Aabspec with the #CXS is spectrometer specific. Temperature control is provided by the programmable Aabspec #STP-6 offering multi-ramps, multi program memory etc.