In a diagnosis method of a control valve, position data representing a position of a control valve, and pressure data representing a pressure difference over a valve actuator, and optionally travel direction of the control valve, is measured during online operation of the control valve. The position data and the pressure difference data are processed to contain data around starting points of a plurality of individual travel movements of the control valve during normal online operation of the control valve. Finally, a valve signature graph of the control valve is determined based on the processed position and pressure difference data, collected at a plurality of points along the travel range of the control valve during online operation of the control valve.

In a diagnosis method of a control valve, position data representing a position of a control valve, and pressure data representing a pressure difference over a valve actuator, and optionally travel direction of the control valve, is measured during online operation of the control valve. The position data and the pressure difference data are processed to contain data around starting points of a plurality of individual travel movements of the control valve during normal online operation of the control valve. Finally, a valve signature graph of the control valve is determined based on the processed position and pressure difference data, collected at a plurality of points along the travel range of the control valve during online operation of the control valve.

A pneumatic detection system and a method of forming the pneumatic detection system are described. The system includes a sealed tube, a refrigerant disposed within the sealed tube, and a switch configured to be activated based on a specified pressure being reached within the sealed tube.

A pneumatic detection system and a method of forming the pneumatic detection system are described. The system includes a sealed tube, a refrigerant disposed within the sealed tube, and a switch configured to be activated based on a specified pressure being reached within the sealed tube.

An apparatus and a method for measuring and monitoring the properties of a fluid, for example, pressure, temperature, and chemical properties, within a sample holder for an electron microscope. The apparatus includes at least one fiber optic sensor used for measuring temperature and/or pressure and/or pH positioned in proximity of the sample.

A smartphone-operated air pressure meter and system includes an air pressure meter having a pair of input channels that are each connected to a pressure chamber and pressure sensor. A control unit is included with the pressure meter for receiving air pressure data and for transmitting the same. The system also includes an airflow balancing application that generates one or more application icons, and calculates airflow information. The airflow information can include the received pressure data alone, or pressure data that has been applied to a mathematical algorithm, along with environmental data.

A smartphone-operated air pressure meter and system includes an air pressure meter having a pair of input channels that are each connected to a pressure chamber and pressure sensor. A control unit is included with the pressure meter for receiving air pressure data and for transmitting the same. The system also includes an airflow balancing application that generates one or more application icons, and calculates airflow information. The airflow information can include the received pressure data alone, or pressure data that has been applied to a mathematical algorithm, along with environmental data.

Dive computers in accordance with embodiments of the invention are disclosed that store information concerning a dive site. The stored information can be accessed during the dive to provide information concerning such things as points of interest and/or hazards. One embodiment of the invention includes a processor, memory connected to the processor, a pressure transducer connected to the processor and configured to measure depth, and a display connected to the processor. In addition, the memory contains factual information concerning a dive site, and the processor is configured to display at least a portion of the stored factual information concerning the dive site via the display.

Dive computers in accordance with embodiments of the invention are disclosed that store information concerning a dive site. The stored information can be accessed during the dive to provide information concerning such things as points of interest and/or hazards. One embodiment of the invention includes a processor, memory connected to the processor, a pressure transducer connected to the processor and configured to measure depth, and a display connected to the processor. In addition, the memory contains factual information concerning a dive site, and the processor is configured to display at least a portion of the stored factual information concerning the dive site via the display.

A polymer layer system pressure sensor device includes a first polymer substrate having a first cavity and a first polymer membrane stretched over the first cavity. The first polymer membrane is configured to be deflected dependent on a pressure in the first cavity. The device further includes a first membrane metallization layer applied to the first polymer membrane above the first cavity. The first membrane metallization layer is configured to be deflected together with the first polymer membrane dependent on the pressure in the first cavity. The device further includes a second polymer substrate, arranged over the first polymer membrane, a second cavity, arranged over the first cavity, and a second polymer membrane, stretched over the second cavity. The device further includes a second membrane metallization layer applied to the second polymer membrane within the second cavity and includes a third polymer substrate arranged over the second polymer membrane.