Abstract: Systems and methods are presented for a method for measuring or monitoring localized corrosion in which an electrochemical noise (ECN) signal is sensed and filtered by a high-pass or band-pass filter to remove low frequency components not related to localized corrosion and a standard deviation of the filtered signal is computed and scaled to provide a localized corrosion value.

Abstract: A Fieldbus system comprising a plurality of segments each comprising a trunk with its own primary power supply, and a shared redundancy system comprising one or more auxiliary power supplies and monitoring and control means, in which the monitoring and control means is adapted to detect failures in any part of any of the plurality of segments, in which in the event of a failure being detected by the monitoring and control means in any one of the plurality of segments, the monitoring and control means isolates the trunk in that segment from its primary power supply and connects said trunk to one of the one or more auxiliary power supplies, and in which any one of the auxiliary power supplies is connectable to any two or more of the trunks.

Abstract: The invention relates to a proximity switch, particularly an inductive proximity switch, with an oscillator having an at least partly self-compensated feedback network influenceable by a target to be detected, as well as an oscillator amplifier.

Abstract: Methods and ultrasonic sensor systems are presented for sensing distance in which an acoustic output signal is directed toward a target and acoustic input signals are received from the direction of the target, and the received signal is compared with a selected one of a plurality of different receiver threshold curves to identify the acoustic wave travel time to the target and back while differentiating between the target and acoustic waves reflected more than once and waves reflecting off obstructions between the sensor and the target, where the user selectable receiver threshold curves are tailored for different target and/or obstruction conditions.

Abstract: A modular Fieldbus segment protector comprising a support means provided with trunk connection means, a trunk connection bus and a plurality of spur outlets, in which autonomous fault isolation means are removably mounted on the support means between the trunk connection bus and any one or more of the plurality of spur outlets.

Abstract: An electrical circuit comprising a power supply, a load, a first pair of parallel positive cables between the power supply and the load, a first pair of parallel negative cables between the load and the power supply, and incendive arc prevention means, in which the incendive arc prevention means comprises monitoring means adapted to monitor the first pair of positive cables and the first pair of negative cables, and to detect if the current and/or voltage in one of the first pair of positive cables deviates from the other, and if the current and/or voltage in one of the first pair of negative cables deviates from the other, and in which the incendive arc prevention means comprises a control means adapted to fully or partially isolate the power supply from the first pair of positive cables and the first pair of negative cables if the monitoring means detects that the current and/or voltage of one of the first pair of positive cables has deviated from the other, or if the current and/or voltage of one of the fi

Abstract: The invention relates to an incremental displacement transducer for determining a displacement of a first object relative to a second object with a scanning unit linked with the first object for scanning a division track linked with the second object having first areas and second areas alternately arranged with a period length, the first areas having a first physical property and the second areas a second physical property differing therefrom. The scanning unit has a plurality of sensors for scanning the first areas and second areas on the basis of the first and/or second physical property. An evaluating unit is linked with the scanning unit for determining the displacement on the basis of the measuring signals of the sensors.

Abstract: The invention relates to an ultrasonic sensor with an adjustable detection range for use in gaseous media, preferably air. A threshold value generator generates threshold value curves that are fed to a comparator. The change in the detection range of the ultrasonic sensor, namely, the change in its switching point curve, is carried out by influencing the threshold value curves, whereby, in a selectable manner, the detection range can be adjusted either exclusively in the lateral extension of the sonic cone or else in the axial and lateral extensions of the sonic cone.

Abstract: An electrical circuit comprising a power supply, a load and an incendive arc prevention means comprising a monitoring means and an isolation means, in which the monitoring means monitors the electrical circuit by means of a reactor means, in which if a short circuit with the potential to cause an incendive arc occurs in the electrical circuit the reaction of the reactor means is detected by the monitoring means and the isolation means fully or partially isolates the power supply from said short circuit, such that an incendive arc cannot occur, in which if an event with a current and/or voltage pattern which is characteristic of a propagating non-incendive arc occurs in the electrical circuit between the power supply and the load, the reaction of the reactor means is detected by the monitoring means, and the isolation means fully or partially isolates the power supply from said event, such that an incendive arc cannot occur.

Abstract: The invention relates to a preferably ferriteless inductive proximity switch having at least one transmitting coil, one oscillator circuit and at least two receiving coils arranged in the alternating magnetic field of the transmitting coil, whereby the transmitting coil and the receiving coil are arranged adjacent to each other on a printed circuit board, and also having an evaluation circuit connected to the receiving coil for evaluating the received signal of the receiving coils when a target approaches the proximity switch.

Abstract: An electrical barrier (10) for connecting a power supply to electrical equipment situated in a potentially explosive atmosphere comprises an input (12), output (13), a shunt Zener diode (14), a fuse (15), an output resistor (16) and the sensor resistor (11). The Zener diode (14) is operable to limit the output voltage of the barrier. In some embodiments multiple Zener diodes are used if desired or appropriate. The output resistor (16) acts to limit the maximum output current whilst the fuse (15) acts to prevent operation of the barrier in the event of an excessive input. The sensing resistor (11), being in series with the Zener diodes (14), allows the current flowing through the Zener diode (14) to be determined. The value of this current is then used to regulate the voltage input to the barrier (10). By using such a sensing resistor in series with the Zener diode (14), the voltage on the Zener diode (14) can be controlled so that the desired current flows.

Abstract: The invention relates to an adaptive comparator circuit comprising a comparator with a threshold value input which receives a threshold voltage and a signal input which receives a voltage signal. The threshold value input is connected to one pole by means of a switch and connected to the other pole of a first voltage source by means of a capacitor. The threshold value input is also connected to the signal input of the comparator by means of a diode or a second voltage source. The switch is controlled by the control signal of a signal transmitter. When the switch is in a closed position, the capacitor is charged with the voltage of the first voltage source. When the switch is in an open position, the capacitor is discharged in such a way that the threshold voltage of the signal voltage is corrected at a given time interval.

Abstract: The invention relates to a casing termination for an electronic casing, particularly sensor casing, with several contact elements for contacting a circuit received in an electronic casing, with a connecting cable having several conductors in each case connected to the contact elements, and with at least one lighting element, particularly a light emitting diode, for providing an optical display for a user. The casing termination is inventively characterized in that the contact elements and lighting element are housed in an at least partly transparent contact display module which, together with an end region of the connecting cable is at least partly surrounded by an at least partly transparent integrally manufactured envelope for mechanical stabilization and electrical insulation purposes and which is connected in tension-proof manner to the contact display module. The invention also relates to a method for the manufacture of a casing termination for an electronic casing.

Abstract: Low power corrosion measurement devices are described with improved LPR, HDA, and ECN measurement capabilities in a field transmitter for online corrosion monitoring or off-line corrosion data logging.

Abstract: Low power corrosion measurement devices are described with improved signal measurement and excitation circuitry in a field transmitter for online corrosion monitoring or off-line corrosion data logging.

Abstract: Corrosion measurement devices are described with electrical isolation and intrinsic safety barriers advanced corrosion measurement in a field transmitter for online corrosion monitoring or off-line corrosion data logging.

Abstract: The invention relates to a device for determining the path of an in particular metallic target, with at least two detection devices so positioned along a path to be monitored that the sensitivity curves of immediately adjacent detection devices at least partly overlap, the detection devices in each case having at least one inductance coil and at least one oscillator and as a function of a damping of the oscillator by the target supply a distance signal, with at least one converting device operatively connected to the detection devices for converting the dampings detected by the detection devices into analog signals, particularly current and/or voltage signals, and with at least one evaluating device operatively connected to the converting device or devices for determining and reading out a local position of the target from the analog signals going back to the detection devices.

Abstract: Low power corrosion measurement devices are described with programmable configuration for implementing one or more advanced corrosion measurement types to provide conductivity, general corrosion, and/or localized corrosion values in a field transmitter for online corrosion monitoring or off-line corrosion data logging.

Abstract: The invention relates to a fastening base for mounting an electrical device, particularly an electric sensor or proximity switch, having a reception opening for receiving a connecting piece of the electrical device and with a locking pivoted lever for fixing the connecting piece in the reception opening, the locking pivoted lever being pivotable into a locking position and an open position. The fastening base is characterized in that the locking pivoted lever has a projecting wedge and that the wedge is constructed for an at least partial positive engagement with a recess in the connecting piece when the locking pivoted lever is pivoted into the locking position.