Pressure sensor, with - a meter body made of ceramic, - a process isolating diaphragm (3, 41) arranged on the meter body, - a pressure measurement chamber enclosed in the meter body under the process isolating diaphragm (3, 41), and - at least one metal body connected to the meter body via a pressure-tight mechanical connection (7, 37, 49), - wherein the pressure-tight mechanical connection (7, 37, 49) comprises an adaptation body (9, 19, 39, 51) arranged between the meter body and the metal body, - wherein the adaptation body (9, 19, 39, 51) has a thermal expansion coefficient which increases - along the adaptation body (9, 19, 39, 51) in the direction (z) running from the meter body to the metal body - from an expansion coefficient that corresponds to a thermal expansion coefficient (σ K) of the ceramic of the meter body to an expansion coefficient that corresponds to the thermal expansion coefficient (σ M) of the metal body, and - wherein the adaptation body (9, 19, 39, 51) is joined to the meter body by means of a first joint and to the metal body by means of a second joint, characterized in that - the adaptation body (9, 39, 51) has a height (h) in the direction running from the meter body to the metal body, and a width (d) perpendicular to this, and - a product of a ratio of the width (d) of the adaptation body (9, 39, 51) to the height (h) of the adaptation body (9, 39, 51) and the value of the difference (Δσ) of the thermal coefficients (σ K, σ M) of the ceramic of the meter body and of the metal of the metal body is less than a constant (ξ) with the dimension 1/K, wherein - the constant (ξ) is less than 0.1 %/K, particularly less than 500 ppm/K, particularly less than 250 ppm/K, particularly less than 125 ppm/K, particularly less than 60 ppm/K, and/or - the constant (ξ) is equal to a quotient of a dimensionless deformation parameter and a temperature difference (ΔT) between a maximum temperature and a minimum temperature (T max, T min) at which the pressure sensor is to be used, and the deformation parameter is less than 4 %, particularly less than 2 %, particularly less than 1 %. - a meter body made of ceramic, - a process isolating diaphragm (3, 41) arranged on the meter body, - a pressure measurement chamber enclosed in the meter body under the process isolating diaphragm (3, 41), and - at least one metal body connected to the meter body via a pressure-tight mechanical connection (7, 37, 49), - wherein the pressure-tight mechanical connection (7, 37, 49) comprises an adaptation body (9, 19, 39, 51) arranged between the meter body and the metal body, - wherein the adaptation body (9, 19, 39, 51) has a thermal expansion coefficient which increases - along the adaptation body (9, 19, 39, 51) in the direction (z) running from the meter body to the metal body - from an expansion coefficient that corresponds to a thermal expansion coefficient (σ K) of the ceramic of the meter body to an expansion coefficient that corresponds to the thermal expansion coefficient (σ M) of the metal body, and - wherein the adaptation body (9, 19, 39, 51) is joined to the meter body by means of a first joint and to the metal body by means of a second joint, characterized in that - the adaptation body (9, 39, 51) has a height (h) in the direction running from the meter body to the metal body, and a width (d) perpendicular to this, and - a product of a ratio of the width (d) of the adaptation body (9, 39, 51) to the height (h) of the adaptation body (9, 39, 51) and the value of the difference (Δσ) of the thermal coefficients (σ K, σ M) of the ceramic of the meter body and of the metal of the metal body is less than a constant (ξ) with the dimension 1/K, wherein - the constant (ξ) is less than 0.1 %/K, particularly less than 500 ppm/K, particularly less than 250 ppm/K, particularly less than 125 ppm/K, particularly less than 60 ppm/K, and/or - the constant (ξ) is equal to a quotient of a dimensionless deformation parameter and a temperature difference (ΔT) between a maximum temperature and a minimum temperature (T max, T min) at which the pressure sensor is to be used, and the deformation parameter is less than 4 %, particularly less than 2 %, particularly less than 1 %.