A method and apparatus for measuring a fluid and determining a leak comprising the steps of providing a meter and a meter register coacting with the meter. When a leak is detected, a signal is transmitted from the meter register regarding fluid consumption. The transmitted signal indicates a leak either when the measured flow rate remains a fixed volume over a fixed period of time, or the measured flow rate exceeds a threshold value.

The invention relates to a field device for automation engineering having a housing, wherein the housing has at least one associated pushbutton switch. Operation of the pushbutton switch is detected, according to the invention, inside the housing without the presence of mechanical or electrical passageway through the wall of the housing. For this, the housing does not need to have a blind hole or an inwardly directed depression. This is achieved by a rigid arrangement of a first element for producing a magnetic field on the outer wall of the housing. By means of interaction with a second element for influencing the magnetic field of the first element, which is arranged in an operating element, a variable magnetic field is produced inside the housing. This magnetic field is sensed by a sensor. On the basis of the alteration in the magnetic field, the sensor can determine whether the pushbutton switch is currently being operated.

A field device includes a housing that contains field device circuitry, a display coupled to the field device circuitry and viewable through the housing, and a movable control positioned around the housing, the movable control including a magnet. The field device further includes a sensing element disposed within the housing and configured to detect movement of the magnet. In addition, the field device includes a processor coupled to the display and the sensing element. The processor is configured to identify a position of the movable control, based on the detected movement of the magnet, and control a user interface on the display, based on the identified position of the movable control.

Provided is a magnetic absolute rotary encoder, comprising a rotation shaft, multiple rotating wheels that can rotate along the rotation shaft, multiple encoding units that correspond to the multiple rotating wheels one-to-one, and one or more permanent magnet assemblies that provide the magnetic bias to the multiple encoding units. Each encoding unit comprises a magnetically permeable encoder disc, the structure thereof enabling the magnetic permeability thereof to be different according to the different positions of the rotation shaft, and comprises multiple sensor units that comprise multiple magnetic sensors. The sensor units are used to sense the magnetic permeability of the magnetically permeable encoder disc and to output the sensor signals that characterize the relative position of the magnetically permeable encoder disc. According to the sensor signals of the sensor units, each encoding unit outputs the value that characterizes the selected rotation position of the corresponding rotation wheel, thereby enabling an absolute magnetic rotating encoder that is simple and low in cost and has more precise magnetic encoder discs.

A bicycle electric device is basically provided to a bicycle crank assembly. The bicycle electric device includes an indicator a process and at least one of a position sensor and a strain sensor configured to be provided on the bicycle crank assembly. The indicator is configured to generate a user signal indicating that a crank arm of the bicycle crank assembly is at a predetermined angular position. The position sensor the strain sensor are configured to be provided on the bicycle crank assembly to detect information of the crank arm. The processor is configured to process information detected by the at least one of the position sensor and the strain sensor to calculate angular force information of the crank arm.

The invention relates to a field device for automation engineering having a housing, wherein the housing has at least one associated pushbutton switch. Operation of the pushbutton switch is detected, according to the invention, inside the housing without the presence of mechanical or electrical passageway through the wall of the housing. For this, the housing does not need to have a blind hole or an inwardly directed depression. This is achieved by a rigid arrangement of a first element for producing a magnetic field on the outer wall of the housing. By means of interaction with a second element for influencing the magnetic field of the first element, which is arranged in an operating element, a variable magnetic field is produced inside the housing. This magnetic field is sensed by a sensor. On the basis of the alteration in the magnetic field, the sensor can determine whether the pushbutton switch is currently being operated.

A position determining sensor unit having a number of sensors arranged at predetermined positions along a path, and a transducer. The transducer has a first end which is moveable at least along the entire path, and a length running parallel to the path. Each sensor has a first supply voltage connection, a second supply voltage connection and a switching output, and wherein the switching output is switched into an On-state or an Off-state as a function of the threshold value of a sensor signal being exceeded or undershot. The supply voltage connection of each sensor is connected to a supply voltage, and a first sensor is arranged at a beginning of the path and a last sensor is arranged at an end of the path so that the second supply voltage connection of the first sensor is connected to a reference potential and the first sensor has a power consumption.

A high temperature reed switch position indicator for a pressurized water reactor in which the drive rod housing is completely immersed in the reactor coolant. The reed switch sensor modules positioned along the control rod drive rod travel housing are constructed solely of metallic, ceramic and glass materials and are sealed within an outer housing to isolate the sensor assembly from the coolant.

Joint reduction simulation training devices include a proximal bone component, and a distal bone component adjacently positioned relative to the proximal bone component. The proximal bone component is provided with a dislocation guide operatively cooperating with an opposed terminal end of the distal simulated bone component to provide a simulated joint between the proximal and distal bone components. The dislocation guide includes a dislocation and reduction sockets establishing dislocated and reduction positions of the distal simulated bone component relative to the proximal bone component when the terminal end of the distal simulated bone component is physically positioned within either the dislocation socket or the reduction socket. A transition surface joins the dislocation and reduction sockets such that the terminal end of the distal simulated bone component is in traversing engagement with the transition surface when the terminal end of the distal simulated bone component is moved from the dislocation socket and into the reduction socket during a reduction training exercise.