The Thermal Desorption Unit (TDU) from GERSTEL is a flexible solution for thermal desorption and thermal extraction. Several techniques are supported by the TDU:
- SBSE using the GERSTEL Twister®.
- Dynamic Headspace (DHS) with analyte concentration based on standard headspace vials.
- Air sampling onto adsorbent tubes.
- Direct thermal extraction of liquids or solids placed in µ-vials.

The TDU can be operated manually or can be automated using the GERSTEL MultiPurpose Sampler (MPS). Up to 196 samples can be analyzed in one automated sequence. The MAESTRO software controls the complete process from sample introduction through thermal desorption to GC/MS analysis with one method and one sequence table ensuring efficient and error-free operation.