Methane is a powerful greenhouse gas. Understanding its biogeochemical cycle helps to understand the mechanism of climate change. Mass spectroscopes are used to detect methane in seawater because the concentrations are very low and other instruments thus fail to detect this molecule. The literature shows that an internal heating of the membrane greatly increases the performance of the spectrometers at great depth. This master studies the feasibility of integrating a new, energy efficient heating management system in the spectrometer. In addition, it defines the structure of a regulation system by internal heating. To check if the system will work and these performances, the first step is to model the system to validate the concept and performance. The system has been divided into 4 subsystems. Each subsystem was modeled analytically. Then the analytical models were compared with FEM simulations. Finally, a prototype was built to design the sensors needed for thermal regulation and their electronics. In summary, this work shows a consistent concept for the development of a thermal management system to improve the sensitivity of marine mass spectroscopy. Key Word: mass spectrometer, heat management, 3D printing, deep water, sensor.