Abstract: An attachment mechanism to a fluid system is provided herein.

Abstract: Method and system for identification of a changed state of a fluid with respect to a reference state of the same fluid, the fluid having an optical parameter changing with the change of the state of the fluid. The method comprises: a) providing an optical arrangement including a transparent enclosure with a portion of the fluid, and an object observable through the optical arrangement, the arrangement being designed such that an image of the object in the changed state of the fluid is optically distinctive from an image of the object in the reference state of the fluid due to change of the optical parameter, at least one of the images being predetermined; b) illuminating the object with diffuse light; c) observing a current image of the object though the optical arrangement along an optical axis; and d) comparing the current image to the predetermined image to identify the changed state of the fluid. The comparison and the identification may be performed by eye or by a sensor with a logical circuit.

Abstract: An optical indicator (130) for identification of a changed state of a fluid with respect to a reference state of the same fluid, or for monitoring or checking or authenticating a fluid. The fluid has an optical parameter that changes with the change of the state of the fluid. The optical indicator (130) may be attached to or integral with a container or packaging (132) for the fluid. The indicator (130) includes a cavity configured to be filed with the fluid such that the fluid filled cavity forms a variable optical element having an optical performance that varies depending on the changeable fluid's optical parameter. The fluid filled cavity coupled to other optical components of the indicator provides an image that may be compared to a reference image to detect a change of at least one optical property of the fluid as compared to the reference fluid. The comparison may be performed visually or by a suitable detector. The comparison may include automated processing of the detector's output signal(s).

Abstract: A vibration sensor enabling measuring a vibratory signal in a single virtual center of mass of the sensor including a chamber within the housing exhibiting a chamber center and chamber surface wherein all portions of the chamber surface are substantially equidistant from chamber center; and two pairs of vibration-sensitive transducers, wherein each transducer has a body including a first end portion, a second end portion and a central axis segment passing axially through the center of the body, between the first end portion and the second end portion; and wherein the first end portion includes a transuding element receptor portion; and wherein the second end portion is in operative association with the housing and each transducer pair of the two or more transducer pairs and includes an axis passing through the central segment of a first transducer, the chamber center, and the central segment of a second transducer.

Abstract: A method for measuring a vibration from four or more equidistant points in a chamber, comprising centering a chamber surface around a center point, containing a fluid within the chamber surface, measuring a fluid vibration from at least four measuring points in juxtaposition with the chamber surface, wherein at least two measuring points are located along a first axis passing through the center point and at least two measuring points are located along a second axis passing through the center point.

Abstract: Fluid level detector device and method are disclosed, for determining the height level of one or more immiscible fluids in a vessel. The device includes at least one optical set-up including a light source for generating a beam of light of predetermined width and optical characteristics, the light beam arranged to be directed into the fluid so as to cause refraction of the light beam, dependent on the index of refraction of the fluid, the light beam covering a predetermined detection region. A photosensitive detector is provided capable of generating a signal corresponding to at least one optical characteristic of the light beam after passing the fluid. An interpreter is provided for receiving the signal, interpreting the signal and indicating the height level of the fluid.

Abstract: An optical indicator (130) for identification of a changed state of a fluid with respect to a reference state of the same fluid, or for monitoring or checking or authenticating a fluid. The fluid has an optical parameter that changes with the change of the state of the fluid. The optical indicator (130) may be attached to or integral with a container or packaging (132) for the fluid. The indicator (130) includes a cavity configured to be filed with the fluid such that the fluid filled cavity forms a variable optical element having an optical performance that varies depending on the changeable fluid's optical parameter. The fluid filled cavity coupled to other optical components of the indicator provides an image that may be compared to a reference image to detect a change of at least one optical property of the fluid as compared to the reference fluid. The comparison may be performed visually or by a suitable detector. The comparison may include automated processing of the detector's output signal(s).

Abstract: A method for measuring a vibration from four or more equidistant points in a chamber, comprising centering a chamber surface around a center point, containing a fluid within the chamber surface, measuring a fluid vibration from at least four measuring points in juxtaposition with the chamber surface, wherein at least two measuring points are located along a first axis passing through the center point and at least two measuring points are located along a second axis passing through the center point.

Abstract: Method and system for identification of a changed state of a fluid with respect to a reference state of the same fluid, the fluid having an optical parameter changing with the change of the state of the fluid. The method comprises: a) providing an optical arrangement including a transparent enclosure with a portion of the fluid, and an object observable through the optical arrangement, the arrangement being designed such that an image of the object in the changed state of the fluid is optically distinctive from an image of the object in the reference state of the fluid due to change of the optical parameter, at least one of the images being predetermined; b) illuminating the object with diffuse light; c) observing a current image of the object though the optical arrangement along an optical axis; and d) comparing the current image to the predetermined image to identify the changed state of the fluid. The comparison and the identification may be performed by eye or by a sensor with a logical circuit.

Abstract: A method and system for communicating a signal between a communication device and an external circuit, includes a signal conversion unit connected to the communication device responsive to a received electromagnetic signal for producing a corresponding optical signal component, and an optical fiber cable coupling the signal conversion unit to the external circuit for propagating the optical signal component to the external circuit. A signal filtering processor is coupled between the communication device and the signal conversion unit for processing the electromagnetic signal prior to converting to the optical signal component.

Abstract: A system for treating an external surface of a building, has (a) at least one treatment unit configured to treat the external surface of the building with a pressurized fluid; (b) at least one suspension system for suspending the treatment unit adjacent to the external surface; (c) at least one suction unit associated with the treatment unit, being activated by the pressurized fluid to generate suction at a suction port; and (d) at least one suction head in fluid connection with a suction port to clamp against the external surface.