Bruker Optics research FT-IR spectrometers are well known for their high flexibility and usability in connection with external measurement devices. Although a large variety of external measurement modules is available (see table I) many R&D spectroscopists require specific external measurement chambers with dedicated optics layouts in order to fulfil their high demands for extremely flexible, variable and/or large size set-up. In figure 1 the Bruker Optics external chamber in its vacuum version A514/V is shown which was designed for such purposes. Typical applied accessories and measurement techniques are listed in table II. Such types of external measurement chambers have a significant additional general value: the instrument´s sample compartment is kept free for quick standard measurements without the need to remove difficult to handle or large and heavy accessories like low temperature cryostats.