Pressure sensor systems that include a pressure sensor die and other components in a small, space-efficient package, where the package allow gas or liquid to reach either or both sides of a membranes of the pressure sensor die. A package can include a substrate and a cap, where either or both the substrate and the cap divide the package internally into two chambers. The substrate can have a solid bottom layer, a middle layer having a slot or path running a portion of the length of the layer, and a top layer having two through-holes that provide access to the slot or path. The cap can have two ports. A first port can lead to a first chamber where a top side of a pressure sensor is in the first chamber. A second port can lead to a second chamber and the slot or path, where the slot or path leads to a bottom side of the pressure sensor.

A pressure transmitter is mounted to the sampling output of a sampling meter resetter. The pressure transmitter and the sampling meter resetter are mounted in a subterranean meter box. In embodiments, the pressure transmitter is removably mounted to a spring-loaded sampling valve.

A pressure transmitter is mounted to the sampling output of a sampling meter resetter. The pressure transmitter and the sampling meter resetter are mounted in a subterranean meter box. In embodiments, the pressure transmitter is removably mounted to a spring-loaded sampling valve.

Sensor assemblies are provided for use in modeling water systems. These sensor assemblies can be used as sensor fish. These assemblies can include a circuit board supporting processing circuitry components on either or both opposing component support surfaces of the circuit board and a housing above the circuit board and the components, with the housing being circular about the circuit board in at least one cross section, and wherein the supporting surfaces of the circuit board are substantially parallel with the plane of the housing in the one cross section.

Methods for emulating interaction of entities within water systems are provided. The methods can include introducing a sensor assembly into a water system. The sensor assembly can include: a circuit board supporting processing circuitry components on either or both of opposing component support surfaces of the circuit board; a housing about the circuit board and the components, the housing being circular about the circuit board in at least one cross section; and wherein the support surfaces of the circuit board are substantially parallel with the plane of the housing in the one cross section.

Provided is a combine sensor including a pressure sensor module as a pressure detector, a thermistor unit as a temperature detector, a housing portion housing the temperature detector closer to a flow path than the pressure detector. The temperature detector includes a thermistor case where a first lead and a second lead connected to a thermistor are partially embedded. The thermistor case includes an extension part and a ring part including a flow hole part. The thermistor is supported by the extension part to be arranged outside an opening end. The extension part is provided by being separated into a portion where the first lead is embedded and a portion where the second lead is embedded, along an extending direction of the extension part, and includes a space portion communicating with the flow hole part and the outside.

Provided is a combine sensor including a pressure sensor module as a pressure detector, a thermistor unit as a temperature detector, a housing portion housing the temperature detector closer to a flow path than the pressure detector. The temperature detector includes a thermistor case where a first lead and a second lead connected to a thermistor are partially embedded. The thermistor case includes an extension part and a ring part including a flow hole part. The thermistor is supported by the extension part to be arranged outside an opening end. The extension part is provided by being separated into a portion where the first lead is embedded and a portion where the second lead is embedded, along an extending direction of the extension part, and includes a space portion communicating with the flow hole part and the outside.

Generally, a sonde, associated components and methods are described which can be used in conjunction with an inground tool having an inground tool housing that defines an inground tool cavity such that the inground tool cavity is exposed to an ambient pressure environment which surrounds the inground tool during an inground operation. A sonde housing assembly includes an exterior configuration that is receivable within the inground tool cavity. The sonde housing assembly at least partially defines a sonde interior and is further configured for receiving the pressure sensor body of a pressure sensor in a pressure sealed engagement. A sonde electronics package is supported within the sonde interior and is at least configured to receive the pressure signal and transfer a corresponding pressure signal from the sonde.

In an embodiment a membrane includes a hydrophobic region having a plurality of hierarchically arranged micrometer-sized and submicrometer-sized units consisting of a membrane material, wherein a single micrometer-sized unit has a diameter of from 1 μm to 5 μm and a single submicrometer-sized unit has a diameter of <1 μm, and wherein the membrane is configured to be used in a pressure sensor system.

A tracking system for tracking a marker device for being attached to a medical device is provided, whereby the marker device includes a sensing unit comprising a magnetic object which may be excited by an external magnetic or electromagnetic excitation field into a mechanical oscillation of the magnetic object, and the tracking system comprises a field generator for generating a predetermined magnetic or electromagnetic excitation field for inducing mechanical oscillations of the magnetic object, a transducer for transducing a magnetic or electromagnetic field generated by the induced mechanical oscillations of the magnetic object into one or more electrical response signals, and a position determination unit for determining the position of the marker device on the basis of the one or more electrical response signals.

A pressure sensor includes: a base substrate including an embossed pattern; a first conductive layer disposed on the base substrate; a pressure sensitive material layer disposed on the first conductive layer such that its electrical characteristic is varied corresponding to a strain applied thereto, the pressure sensitive material layer including a dielectric and nanoparticles dispersed in the dielectric; and a second conductive layer disposed on the pressure sensitive material layer, wherein the dielectric and the nanoparticle include materials having pyroelectricities of polarities opposite to each other.