A pressure sensor is disclosed. The pressure sensor includes a pressure sensor unit provided with a pressure detecting element configured to receive a drive voltage from a control substrate and electrically send a pressure detection signal to the control substrate so as to detect a pressure of fluid, and a plurality of electric wires connected to the pressure detecting element so as to supply the drive voltage and drawn to the outside so as to send the pressure detection signal. The pressure sensor may also include a relay substrate connected to the plurality of electric wires and having a converting circuit mounted thereon. The converting circuit converts either or both of the drive voltage supplied from the control substrate and the pressure detection signal sent to the control substrate.

A measurement system (20) includes pressure measurement apparatuses (220, 221, 222) capable of measuring pressure. The pressure measurement apparatuses (220, 221, 222) measure pressure at a measurement timing designated by a trigger signal.

Inflatable device pressure gauge apparatus and methods are described. According to one aspect, an inflatable device pressure gauge apparatus includes a housing, an attachment mechanism configured to attach the pressure gauge apparatus to an inflatable device which comprises an air chamber which is configured to be inflated to an increased pressure above atmospheric pressure during use of the inflatable device, a pressure sensor coupled with the housing and configured to sense pressurized air from the air chamber of the inflatable device and to output a signal corresponding to an air pressure within the air chamber, a processor configured to process the signal from the pressure sensor and to control generation of a user perceptible emission regarding the air pressure of the air chamber as a result of the processing of the signal, and a power source coupled with the housing and configured to provide electrical energy to the processor.

Transducer assemblies that selectively measure a fuel pressure within a fuel supply system of an aircraft, aircraft that include the transducer assemblies, and methods of utilizing a transducer assembly. The transducer assemblies include an electronic pressure transducer, which is configured to measure the fuel pressure and to generate a fuel pressure signal indicative of the fuel pressure, and an electronic pressure display, which is configured to receive the fuel pressure signal and to display the fuel pressure responsive to receipt of the fuel pressure signal. The transducer assemblies also include a power supply structure and an attachment structure, which is configured to operatively interconnect the electronic pressure transducer to the aircraft. The attachment structure includes a fitting, which is configured to interface with a pressure switch receptacle of the aircraft, and a valve actuation structure, which is configured to selectively actuate a receptacle valve of the pressure switch receptacle.

A method includes obtaining a set of pressure measurements at an electronic pump and storing the set of pressure measurements in a memory storage, where each measurement time of the set of pressure measurements is within a measurement duration. The method includes determining and sending a measure of central tendency to a second computing device via a first wireless signal. The method also includes determining a subset of pressure measurements based on the set of pressure measurements. The method includes transferring the first subset of pressure measurements to a data collection device via a second wireless signal, wherein an operating frequency of the second wireless signal is greater than one gigahertz and deleting the first subset of measurements from the memory storage.

Methods, systems and a kit for indicating brake air pressure status in brake pipes of multiple interconnected train cars are provided. The methods include operating at least one end-hose adapter per train car. Each end-hose adapter is mounted between a train car end hose and a brake pipe to be in fluid communication therewith and are configured to sense the brake air pressure in the brake pipe. Each end-hose adapter kit includes connections adapters for connecting either end to different parts of the train car system. The end-hose adapter provides a first visual indication when the brake air pressure is within an operable range and/or a second visual indication when the brake air pressure is below an operable value and is experiencing leakage.

A dive computer with a free dive mode and/or wireless data transmission capabilities. In one embodiment the invention relates to a diving apparatus including a dive computer having a free dive mode, where the dive computer is configured to calculate a nitrogen loading in the free dive mode using a default value which is the fraction of oxygen in air, and where the free dive mode is used when a diver makes a dive without a self-contained underwater breathing apparatus. Another embodiment includes a method of operating a dive computer including recording two or more first identifiers, receiving pressure information from two or more pressure transmitters, the pressure information comprising second identifiers and pressure measurements, determining whether the pressure information contains one of the two or more first identifiers, and displaying a message indicative of the pressure information that contains one of the two or more first identifiers.

A sport-boot pressure monitoring system and method of use. The system includes a left boot sensor having a left flexible fluid-containing bladder shaped to fit between a user's left leg and an interior surface of a left boot worn by the user and a left pressure sense element in pressure-sensing communication with the left flexible fluid-containing bladder, a right boot sensor that is similar to the left one, and a controller to provide a pressure alert if pressure between one of the user's legs and the interior surface of the boot worn on that leg violates a predetermined pressure threshold and to provide a proximity alert if a distance between the left and right boots violates a predetermined proximity threshold.

Disclosed is a method for monitoring pressure, for a vessel assembly including a sealed vessel capable of holding a liquid, a filter capable of capturing vapors from the liquid, a pipe connecting the vessel to the filter, and an isolation valve arranged to selectively shut off the pipe, including a detection of the boiling of the liquid contained in the vessel.

A power management system and method including a normally-open switch, an on/off circuit, a microprocessor, and at least one sensor to monitor a condition. The on/off circuit includes an on/off control gate-controlled switch device such as a PMOS device for system power, a flip/flop switch to respectively activate and deactivate the on/off control PMOS device, and a transition detection circuit connected to the normally-open switch. A single DC power source establishes a source voltage to power the on/off circuit and the normally-open switch. The transition detection circuit generates an on signal when the user initially activates the normally-open switch, and supplies the on signal to the flip/flop switch to change it to an on state to activate the on/off control PMOS device. While activated, the on/off control PMOS device enables system power from the power source to be provided to at least the sensor and the microprocessor. The microprocessor generates an off signal when the normally-open switch is activated for at least a selected period of time, and supplies the off signal to the flip/flop switch to change it to an off state to deactivate the on/off control PMOS device and thereby disable system power to at least the sensor and the microprocessor.