The invention relates to a dry module (1, 39) for a relative pressure measurement recorder (3), which relative pressure measurement recorder has a reference pressure feed (17) leading, in the interior of a housing (5) of the measurement recorder (3), from a relative pressure sensor (7) to an opening (15) in a housing wall of the housing (5) and has a connection element (19), the interior of which is connected by means of the opening (15) to the reference pressure feed (17) extending in the measurement recorder (3), the dry module comprising a module housing (23), which has an interior, in which a desiccant (31) is located, and comprising a reference pressure feed (25, 41) extending through a module housing (23), to a first end of which reference pressure feed the reference pressure (p
ref ) can be applied through an opening (27) in the module housing (23), a second end of which reference pressure feed can be connected to the reference pressure feed (17) of the measurement recorder (3) by means of a connection element (21) of the dry module (1, 39) that can be connected to the connection element (19) of the measurement recorder (3), and the interior of which reference pressure feed is in moisture-permeable connection, in the module housing (23), with the interior containing the desiccant (31).