Stop mechanism for a diaphragm pressure transducer

A pressure transducer for measuring the pressure of a fluid under pressure, comprising:

• a liquid
• a housing having a cavity therein;
• a diaphragm capable of displacement mounted within said cavity, dividing said cavity into a first and a second chamber, said first chamber adapted to receive said fluid, said second chamber containing said liquid;
• means for measuring the pressure of said fluid in relation to the displacement of said diaphragm;
• sealing means for sealing said second chamber to contain said liquid;
• and
• a volume of vapor contained in said second chamber wherein said volume of vapor condenses into said liquid when said diaphragm is displaced a first distance, said liquid and said vapor being of sufficient quantity to prevent said diaphragm from displacing beyond a second distance greater than said first distance.

A pressure transducer for measuring the pressure of a fluid under pressure, comprising:

• a first liquid;
• a second liquid;
• a housing having a cavity therein;
• a first diaphragm capable of displacement mounted within said first cavity, dividing said cavity into a first and a second chamber, said first chamber adapted to receive said fluid, said second chamber containing said first liquid;
• a second diaphragm capable of displacement mounted within said second chamber, dividing said second chamber into a second and a third chamber, said third chamber containing said second liquid;
• means for measuring the pressure of said fluid in relation to the displacement of said second diaphragm;
• sealing means for sealing said first and said second chambers, respectively, to contain said first and said second liquids;
• and
• a volume of vapor contained in said second chamber wherein said volume of vapor condenses into said liquid when said diaphragm is displaced a first distance, said liquid and said vapor being of sufficient quantity to prevent said diaphragm from displacing beyond a second distance greater than said first distance.