One implantable medical device is described. In an example, implantable medical device includes the electromechanical substrate and sensor for being set to substrate, such as a pressure sensor. At least part sensor encapsulates packed via a liquid. Encapsulation includes the flexible outer membrane for surrounding an at least part of forming for sensor. Encapsulation further include be configured at pressure sensor and flexible outer membrane at least partly between hydrophobic liquid. Implantable medical device can be a part of a medical system for monitoring the medical operating of medical conditions or execution based on implantable medical device. In addition, manufacturing method description is for encapsulating sensor in liquid encapsulation.