The patented Sniffer interface was developed by Thermo Cahn to satisfy three objectives. First, the interface must sample the evolved gases before they are allowed to diffuse through the entire volume of the TGA reaction cell. Second, the interface must connect to both mass spectrometers and FTIR spectrometers. Third, each spectrometer must receive the optimum flow from the TGA without compromising the performance of the TGA, FTIR or MS.