Dry module for a sensor designed to measure a pressure (p) to be measured as a relative pressure (p R) in relation to a reference pressure (p ref) present in the environment of the sensor, - wherein said module has a reference pressure supply, inside a housing of the sensor, leading from a relative pressure sensor to an opening in a wall of the housing, and - wherein said module has a connection element, whose interior area is connected via the opening to the reference pressure supply extending through the sensor, wherein said dry module comprises - a module housing which has an interior area in which a drying agent, particularly a moisture-absorbing material, is located and - a reference pressure supply extending through the module housing, -- whose first end can be subject to the reference pressure (p ref) via an opening in the module housing, -- whose second end can be connected to the reference pressure supply of the sensor by means of a connection element of the dry module which can be connected to the connection element of the sensor in such a way that the dry module arranged outside the sensor is mounted upstream from the reference pressure supply of the sensor arranged inside the sensor, and -- whose interior area in the module housing is connected to the interior area containing the drying agent in a manner that is permeable to moisture, - wherein the reference pressure supply extending through the module housing comprises a line in the form of a capillary line with a wall that is impermeable to moisture, - wherein the connection, which is permeable to moisture, of the interior area of the reference pressure supply with the interior containing the drying agent is implemented via an open end of the line facing towards the connection element which can be connected to the connection element of the sensor, and - wherein a cavity is provided which is adjacent to the open end of the line and which enters into an interior area of the module housing which surrounds the outside of the line. - wherein said module has a reference pressure supply, inside a housing of the sensor, leading from a relative pressure sensor to an opening in a wall of the housing, and - wherein said module has a connection element, whose interior area is connected via the opening to the reference pressure supply extending through the sensor, - a module housing which has an interior area in which a drying agent, particularly a moisture-absorbing material, is located and - a reference pressure supply extending through the module housing, -- whose first end can be subject to the reference pressure (p ref) via an opening in the module housing, -- whose second end can be connected to the reference pressure supply of the sensor by means of a connection element of the dry module which can be connected to the connection element of the sensor in such a way that the dry module arranged outside the sensor is mounted upstream from the reference pressure supply of the sensor arranged inside the sensor, and -- whose interior area in the module housing is connected to the interior area containing the drying agent in a manner that is permeable to moisture, - wherein the reference pressure supply extending through the module housing comprises a line in the form of a capillary line with a wall that is impermeable to moisture, - wherein the connection, which is permeable to moisture, of the interior area of the reference pressure supply with the interior containing the drying agent is implemented via an open end of the line facing towards the connection element which can be connected to the connection element of the sensor, and - wherein a cavity is provided which is adjacent to the open end of the line and which enters into an interior area of the module housing which surrounds the outside of the line.