DAVINCI Probe
As it descends through the atmosphere, the DAVINCI probe will collect gas samples from the atmosphere at different altitudes. A gas inlet located on the probe's exterior will suck up the gases and, through a series of pipes and valves, make its way to the VTLS for data transmission back to Earth.
VTLS
The Venus Tunable Laser Spectrometer (VTLS) is a device within the DAVINCI probe. The VTLS will study the chemical reactions in the upper atmospher and the near-surface environment. Additionally, the VTLS will detect key gas species containing Hydrogen, Sulfur, Carbon and Oxygen, as well as high precision measurements of the Deuterium to Hydrogen ratios at various altitudes.