DESIGN FOR CORROSION RESISTANT PRESSURE SENSOR USING CONTROLLED LEAK PRINCIPLE

A device for measuring pressure of ammonia or a gas mixture comprising ammonia or another corrosive gas, the device comprising: a pressure sensor, a housing of the pressure sensor, wherein the pressure sensor comprises a membrane, the membrane separating an ammonia pressure space from a non-pressure space and having a side directly exposed to ammonia and being able to exhibit a physical response to ammonia pressure, and a transducer located in the non-pressure space and capable of converting the physical response of the membrane to ammonia pressure into a transmittable pressure signal, wherein a double sealing structure is provided between the ammonia pressure space and the non-pressure space having first and second sealings, wherein an intermediate space between the first and second sealings is in communication with outside the housing by means of an outlet.