The disclosure provides for apparatus, including coated parts, where a base material of the part is coated with a multilayer coating. The multilayer coating includes at least three layers, including at least two electrically conductive layers. Also provided is a method for making apparatus, which includes providing a part and applying a multilayer coating to the base material of the part. Further provided is a method of monitoring and diagnosing a condition of a coated part. The method includes providing a coated part having a multilayer coating on a base material, measuring an electrical response of the multilayer coating, and correlating the electrical response with a condition of the multilayer coating.

This electrical tree test method is a method for testing for electrical trees in an insulating member including a mica insulation applied to an electrical conductor. The method comprises: an assembly setting step of setting an electrode setting assembly to the outside of the mica insulation; an impregnation step of impregnating the mica insulation with synthetic resin after the assembly setting step; a removal step of removing components of the electrode setting assembly, except an electrode structure, after the impregnation step; a power supply connecting step of connecting, after the removal step, the electrical conductor and the electrode structure to a power supply in order to apply a voltage between the electrical conductor and the electrode structure; and a voltage applying step of applying a voltage between the electrical conductor and the electrode structure, after the power supply connecting step.

Determining integrity of an insulative protective layer on a structure as an indication of damage to the structure. Applying conductive layer on the insulative protective layer and mounting electrical or electronic monitoring equipment to the structure and the conductive layer to capture different measurements and determine integrity of insulative layer and other parameters. The insulative protective may a polymer powder that is flame spayed onto the structures. The insulating layer may be applied directly to the structure or may be applied to an epoxy layer, possibly while the epoxy layer is still tacky so that the layers blend together. The conductive layer may be a metallic layer that may be metal sprayed. Multiple insulating and conductive layers may be utilized, and measurements may be taken between or within different layers.

A corrosion prevention survey system for determining locations of faults along an underground structure includes a data collector to record location data and voltage data; a voltage reading system to secure to a leg of a user, the voltage reading system having a pole with a spike to be inserted into a ground surface, the spike being able to read a voltage current running through the ground; an attachment device to secure the pole to the leg of a user; and one or more wires to connect the pole to the data collector; the pole is a predetermined length not greater than 2 feet; the voltage data is transmitted from the pole to the data collector; and the location data and voltage data are used in analysis to determine directions of voltage gradients for further determination of location of faults along the underground structure.

A sensor assembly for a downhole tool including a tool body and a movable component movably positionable about the tool body is disclosed. The sensor assembly may include a wear sensor and/or a position sensor. The wear sensor may include a core with conductors at various depths to send a signal, whereby, upon wear of the core, a change in the signal at the depth of the wear is detectable. The position sensor may be carried by the movable component, and may be used with references comprising magnets distributed about the tool body. The position sensor includes magnets having polarity responsive to polarity of the references whereby a position of the movable component is determined. The sensor assembly may also include a chassis housing electronics coupled to the position sensor and/or the wear sensor.

Arrangement and method for detecting damage to an inner coating of a container is provided. The arrangement has been devised which is influenced by damage to the inner coating and/or actuation of plant parts (shut-off valves) and/or by electrical changes in the current paths. This is accomplished such that the latter generates a reproducible signal excursion which can be assigned to the respective activity and therefore to the corresponding parts of the plant, such as a container. Thus, by means of the measuring arrangement, both slowly changing values, which arise as a function of process-induced slowly changing process parameters, such as temperature, concentration, conductivity, and other gradually occurring damage to an inner coating, and also short-term significant changes of values are detected, which are brought about e.g. by pumping operations or by connecting together plant parts, which influence the electrical properties of the system. The detected signal excursion is interpreted.

A leak detection system includes a testing interface, which includes a rotation holder configured to retain and rotate a package. The testing interface includes a plunger apparatus configured to actuate a plunger to apply a pressure to the package before and/or during the package being inspected using a high voltage leak detection (HVLD) apparatus. The testing interface also includes a controller configured to operate and coordinate the operation of the testing interface with operation of the HVLD apparatus.

A sensor for real time monitoring the quality of welding joints in the plastic film at the production of plastic bags on roll by measuring material changes in the welding joint is provided. The sensor comprises at least two electrode pairs arranged to measure changes in the dielectric properties of the material when the welding joint is passing through the measuring gap of the electrodes and provide a measuring signal proportional to the material change in the welding joint. The measuring signal is evaluated to detect defective welding joints in the plastic film. The electrodes are arranged so that one pair of the electrodes constitutes the signal measuring gap arranged for measuring the welding profile. The form of the measuring electrode conforms to the direction and form of the welding joint. The other pair of electrodes constitutes the reference measuring gap arranged to provide an averaged signal across the surface of the plastic film. The difference between the reference signal and the measuring signal then provides a signal which can be used for monitoring the welding quality.

A fiber composite component having an integrated structural health sensor arrangement includes a plurality of layers of fibers embedded in a matrix material, at least two rupture sensing fibers arranged on or in at least one of the layers, wherein the rupture sensing fibers are carbon fibers having an electrically insulating coating, and two electrical connection devices, each being accessible from an outer delimiting surface or an outer edge of the component, wherein the electrical connection devices are connected to different ends of the rupture sensing fibers.

A multilayer component is coated with a fluorogenic probe designed to give off florescence when in contact with one or more metals in the multilayer component. The fluorogenic probe is exposed to radiation. The intensity and wavelength of the florescence is measured to determine a porosity of the one or more layers of the multilayer component.