Pressure sensing device

A pressure sensing device adapted to measure pressure of a fluid, including

• a body member made of an inert material that does not react chemically with the fluid,
• said body member having an inlet into which the fluid is introduced and a first thin wall diaphragm section integral with the body member, said first thin wall diaphragm section having an exterior surface and an interior surface,
• a sensor device that provides a signal proportionate to the pressure of the fluid within body member,
• said sensor device having an exterior surface with a bridge resistor circuit mounted thereon and an interior surface with an annular groove therein,
• said first thin wall diaphragm section having an annular raised portion that fits snug within the annular groove in the interior surface of the sensor device,
• a header member that overlies the sensor device and has an interior surface that bears against the exterior surface of the sensor device, said interior surface of the header member and the exterior surface of the sensor device having elements therein that mate with each other, and
• a liner member made of an inert material that does not react chemically with the fluid and that fits within the body member adjacent the first thin wall diaphragm section and includes a second thin wall diaphragm section integral with the liner member,
• said second thin wall diaphragm section having an exterior surface of a shape that conforms to the interior surface of the first thin wall diaphragm section and abuts and covers substantially the entire interior surface of the first thin wall diaphragm.

A pressure sensing device adapted to measure pressure of a fluid, including

• a body member having an exterior and made of an inert material that does not react chemically with the fluid,
• a liner member made of an inert material that does not react chemically with the fluid and seated within the body member,
• said body member and said liner member each having an inlet into which the fluid is introduced and a thin wall diaphragm section, said thin wall diaphragm section of the body member being integral therewith and said thin wall diaphragm section of the liner member being integral therewith, and said thin wall diaphragm sections of the body member and liner member being nested snugly together, and
• a sensor device that provides a signal proportionate to the pressure of the fluid within body member and is mounted to the exterior of the body member adjacent the thin wall diaphragm section of the body member in a manner that causes the sensor device to change shape as the thin wall diaphragm section changes shape in response to changes in the pressure of the fluid within the housing.

A pressure sensing device adapted to measure the pressure of a corrosive fluid and including a dual containment system, said device comprising

• a pressure sensor,
• a chamber having an inlet into which the fluid is introduced and an internal surface in contact with the fluid that is made of a material that does not react with the fluid,
• said chamber having a thin wall in contact with the sensor which is mounted outside to the chamber and next to the thin wall, said sensor and wall having mating surfaces, and said thin wall acting as a secondary fluid containment barrier, and
• a primary containment barrier within the chamber made of a material that does not react with the fluid, said thin wall and primary containment barrier having mating surfaces,
• all said mating surfaces being in vacuum contact.

A pressure sensing device adapted to measure pressure of a fluid, including

• a body member made of an inert material that does not react chemically with the fluid,
• said body member having a thin wall diaphragm section integral with the body member, said thin wall section having an exterior surface and an interior surface,
• a sensor device that provides a signal proportionate to the pressure of the fluid within the body member,
• said sensor device having exterior surface with a bridge resistor circuit mounted thereon and an interior surface,
• said interior surface of the sensor device and the interior surface of the thin wall diaphragm section being in intimate contact with each other.

A pressure sensing device adapted to measure pressure of a fluid, including

• a body member made of an inert material that does not react chemically with the fluid,
• said body member having an inlet into which the fluid is introduced and a thin wall diaphragm section integral with the body member, said thin wall section having an exterior surface and an interior surface,
• a sensor device that provides a signal proportionate to the pressure of the fluid within the body member,
• said sensor device having exterior surface with a bridge resistor circuit mounted thereon and an interior surface with a predetermined profile, and
• said thin wall diaphragm section having a predetermined profile that is substantially the same as the predetermined profile of the interior surface of the sensor device,
• said interior surface of the sensor device and the interior surface of the thin wall diaphragm section being in intimate contact with each other.

A pressure sensing device adapted to measure pressure of a fluid, including

• a body member made of an inert material that does not react chemically with the fluid,
• said body member including a thin wall diaphragm section integral with the body member, said thin wall diaphragm section having a n exterior surface and an interior surface, and
• a sensor device that provides a signal proportionate to the pressure of the fluid within the body member,
• said sensor device including a substantially disk shaped support member having an exterior surface and an interior surface, said interior surface of the disk shaped support member having a mating element that interlocks with a counterpart mating element on said body member, and the exterior surface of the disk shaped support member having a bridge resistor circuit mounted thereon,
• said interior surface of the disk shaped support member and the interior surface of the thin wall diaphragm section each having substantially the same predetermined profile and being nested snugly together in intimate contact with each other.

A pressure sensing device adapted to measure pressure of a fluid, including

• a body member made of an inert material that does not react chemically with the fluid,
• said body member having a thin wall diaphragm section integral with the body member, said thin wall section having an exterior surface and an interior surface, and
• a sensor device that provides a signal proportionate to the pressure of the fluid within the body member,
• said sensor device having exterior surface with a bridge resistor circuit mounted thereon and an interior surface, and
• said interior surface of the sensor device and the interior surface of the thin wall diaphragm section being in intimate contact with each other through the application of a vacuum.