A sensor device includes an excitation magnet which generates an alternating excitation magnetic field, an energy generator having a pulse wire module in which electric energy pulses are generatable via the alternating excitation magnetic field, at least one sensor element which senses a physical variable and which provides a sensor signal, an evaluation unit which evaluates the sensor signal, and a wireless data interface which is connected to the evaluation unit via a data connection. The at least one sensor element and the evaluation unit are each electrically connected to the energy generator and are suppliable with an electric energy thereby.

A flow monitoring apparatus includes one or plural hydrophones that receive plural sounds transmitted through a tube wall and/or inside a tube, and a controller including circuitry which converts the plural sounds received by one or plural hydrophones to received signals, extracts flow information from the received signals, evaluates flow rate in a tube, and transmits the volume flowing in a tube per unit of time.

A flow sensor sub-assembly for sensing flow of a fluidic medicament is disclosed. The flow sensor sub-assembly includes a first spring contact and a second spring contact. The spring contacts are secured to a base that has a circuit for conducting an electrical signal to and from the spring contacts to a microprocessor. The first spring contact is in electrical communication with a first piezo element and the second spring contact is in electrical communication with a second piezo element. The first spring contact has a first contact force against the first piezo element and the second spring contact has a second contact force against the second piezo element, and the first and second contact forces are equivalent. A circuit board for interfacing to a flow sensor having a plurality of piezo elements for transmitting a flow signal indicative of flow of fluidic medicament is also disclosed.

An apparatus for energy and data transfer, can include a first inductor and a second inductor, wherein the first inductor can be magnetically coupled to the second inductor, and a gap configured between the first inductor and second inductor, wherein the first inductor and the second inductor can transfer energy and data between a white meter and an electronic index. The white meter may be implemented as a flow meter. The electronic index can include an electronic display unit that can be attached to the white meter. The electronic display can include one or more of a display unit, a communications unit, or a combination of a display unit and the communications unit.

A flow meter, includes a casing, having a central cavity flow communication with an inlet and an outlet conduit; first and second toothed intermeshing oval gears, respectively rotatably supported in the central cavity via a primary support shaft and a secondary support shaft. The first oval gear has an upper surface provided with a protrusion and a magnet, with at least a portion of the magnet arranged within said protrusion, said magnet centered with respect to an axis of rotation of the first gear, and rotating concentrically with respect to the axis of rotation of the first gear; The flowmeter further includes a top cap having an interior cavity; in which a sensor is arranged, so that when the cap is placed on the casing of the flowmeter, the sensor or encoder is situated above the magnet of the first gear. The cap has a bottom surface with a zone of reduced thickness defining a lower recess arranged below the inner cavity of the cap, so that the projection of the first gear is received in the lower recess, so as to aligning and bring the magnet in close proximity with the sensor or encoder thereby avoiding pressure flexing.

A flow meter, includes a casing, having a central cavity flow communication with an inlet and an outlet conduit; first and second toothed intermeshing oval gears, respectively rotatably supported in the central cavity via a primary support shaft and a secondary support shaft. The first oval gear has an upper surface provided with a protrusion and a magnet, with at least a portion of the magnet arranged within said protrusion, said magnet centered with respect to an axis of rotation of the first gear, and rotating concentrically with respect to the axis of rotation of the first gear; The flowmeter further includes a top cap having an interior cavity; in which a sensor is arranged, so that when the cap is placed on the casing of the flowmeter, the sensor or encoder is situated above the magnet of the first gear. The cap has a bottom surface with a zone of reduced thickness defining a lower recess arranged below the inner cavity of the cap, so that the projection of the first gear is received in the lower recess, so as to aligning and bring the magnet in close proximity with the sensor or encoder thereby avoiding pressure flexing.

A testing device for backflow prevention devices, the testing device comprising a first connection portion adapted for connection to one of a high pressure side or a low pressure side of a backflow prevention device, a second connection portion adapted for connection to the other of the high pressure side or the low pressure side of the backflow pressure device, and an electronic differential pressure gauge positioned in fluid communication with the first connection portion and the second connection portion and adapted to measure the differential pressure between the high pressure side and the low pressure side of the backflow prevention device.

A magnetic sensor assembly for rotary gas meters includes a counter module electronic volume corrector (“EVC”). In one aspect, the assembly includes a magnetic sensor probe configured to be releasably secured within an aperture of a first gas meter body. The sensor probe may alternatively be positioned within an adapter sleeve. The adapter sleeve is configured to be releasably secured within an aperture of a second gas meter body. In another aspect, the counter module EVC includes a base coupling member, and the assembly includes first and second magnetic sensor probes, the probe being configured to be releasably secured within apertures of first and second gas meter bodies, respectively. Each probe has a probe coupling member that is releasably engagable with the base coupling member.

A personal flow meter for measuring water consumption of an individual has a housing, inductors attached to the exterior of the housing and a rotatable member disposed within the housing. A front cover and rear cover are attached to the housing. The front cover includes a fluid inlet having an angulated internal fluid channel that causes water to enter the housing at an angle. The rear cover has a fluid outlet to allow egress of water within the housing. The rotatable member includes angulated fins. Water entering the housing via the internal fluid channel perpendicularly strikes the fins to initiate rotation of the rotatable member. Magnets are attached to the rotatable member in an alternating magnetic pole arrangement. Rotation of the rotatable member causes the inductors to generate voltage signals. Electronic circuitry processes the voltage signals and generates signals that represents the individual's water consumption over a period of time.

Some embodiments provide an irrigation flow sensor system, comprising: a housing forming a fluid channel to cooperate with conduits of an irrigation system; a paddle wheel device with at least a first blade of a set of the blades comprises a magnetic element; the paddle wheel device is positioned with at least a portion of the blades extends into the fluid channel as the blades rotate about an axis; a magnetic sensor proximate a pathway of the magnetic element as it rotates configured to provide a sensor output every time the magnetic element passes the magnetic sensor; a switch coupled to the magnetic sensor and a current loop, wherein the switch in an activate state is configured to temporarily change the current in the current loop in response to the sensor output, with a rate of change in current corresponding to a flow rate of the fluid flowing.