Abstract:
A sensing apparatus (and corresponding method) for monitoring carbon dioxide dissolved in a liquid solution employs a crystal surrounded in part by a sample chamber such that, in use, the liquid solution is in direct contact with the crystal.
Abstract:
A process analysis unit includes a base module and an exchangeable cartridge module. The base module comprises at least one independent pump drive, and an analyte sensor without a fluidic measuring section. The cartridge module comprises a liquid reservoir tank, a sample taking device, at least one drive-less pump mechanism configured as a peristaltic membrane pump, a fluidic measuring section for the analyte sensor, and a plastic material plate with groove-like microfluidic channels configured to connect the liquid reservoir tank, the at least one drive-less pump mechanism, and a measuring section. The drive-less pump mechanism is driven pneumatically and pumps a liquid from the liquid reservoir tank. When the cartridge module is connected to the base module, the at least one drive-less pump mechanism is connected to and is driven by the at least one independent pump drive, and the fluidic measuring section is connected to the analyte sensor.
Abstract:
An apparatus for placement on or in a body of water for hyperspectral imaging of material in the water comprises an artificial light source and a hyperspectral imager. These are arranged so that in use light exits the apparatus beneath the surface of the water and is reflected by said material before re-entering the apparatus beneath the surface of the water and entering the hyperspectral imager. The hyperspectral imager is adapted to produce hyperspectral image data having at least two spatial dimensions.
Abstract:
A low cost sensing system that can measure both chlorophyll concentration and turbidity is provided. The system is an optical system that utilizes at least three light sensors for measuring side-scattered and forward scattered light, as well as fluorescence. The system is able to take optical density measurements, steady state fluorescence measurements and maximum fluorescence measurements, and can be configured for wireless control and data transmission. The system may also be housed in one or more fluidtight housings so as to make it submersible.
Abstract:
Sensors, such as optical sensors and other sensors used in an aqueous environment are protected from biological contamination by applying a biocide behind a shutter. The shutter is capable of covering a subject portion of the sensor or surrounding mounting surface adjacent the sensor in at least a semi-sealing manner. A well or reservoir forms a chamber in the shutter that is capable of holding a biocide having a limited water solubility and a low environmental toxicity in the aqueous environment, for example, anhydrous iodine crystals. The reservoir is in communication with the portion of the sensor while positioned against the portion of the sensor or surrounding mounting surface adjacent the sensor.
Abstract:
A waterproof housing structure for portable optical analyzer mainly comprises a hard upper casing, a lower casing and a fastening element. The hard upper casing contains an outer rim and an inner rim. The lower casing contains a hard inner shell and a pliable cap. The hard inner shell has a trapezoidal rim which has a first trapezoidal surface and a second trapezoidal surface lower than the first trapezoidal surface. The pliable cap wraps a portion of outer surface of the hard inner shell, and has an outer edge and an inner edge mating the upper casing. The fastening element fastens the hard upper casing to the lower casing. Thus the two irregular rims and edges can be coupled to prevent liquid permeation. Fabrication and assembly during production or repair and maintenance are simpler. It also improves grasp feeling and anti-slipping effect on the handgrip of the portable optical analyzer.
Abstract:
The present invention provides an automatic sampling and dilution apparatus for use in a polymer analysis system. The apparatus comprises (a) a primary mixing chamber; (b) a primary pump capable of continuously withdrawing a variable viscosity liquid from a reactor at a selectable, fixed withdrawal rate over a varying viscosity range of about 50 to about 5,000,000 centipoise (cP) for continuously conveying the variable viscosity polymer-containing liquid into the primary mixing chamber; (c) a first dilution pump for continuously delivering a first dilution solvent into the primary mixing chamber at a selectable, fixed flow rate to mix with the variable viscosity liquid in the mixing chamber and thereby form a diluted polymer-containing liquid therein; and (d) a secondary pump for continuously conveying the diluted polymer-containing liquid into a flow-through detector. A polymer analysis system utilizing the automatic sampling and dilution apparatus is also provided.
Abstract:
A low cost sensing system that can measure both chlorophyll concentration and turbidity is provided. The system is an optical system that utilizes at least three light sensors for measuring side-scattered and forward scattered light, as well as fluorescence. The system is able to take optical density measurements, steady state fluorescence measurements and maximum fluorescence measurements, and can be configured for wireless control and data transmission. The system may also be housed in one or more fluidtight housings so as to make it submersible.
Abstract:
A ring lamp includes a light source having a first hollow cylinder with a lighting device disposed therein. The light source has an emitting surface with a light-emitting direction oriented toward an axis of the hollow cylinder. The lamp also includes a light directing device configured to direct light emission. The light directing device includes a lens system having a lens formed as a second hollow cylinder and configured to focus light into a radial plane which is orthogonal to the axis. The lens system has a ring-shaped aperture diaphragm disposed centrally in an optical path of the light emission behind the lens. The emitting surface of the light source and the lens system have a same length, are coaxial and axially aligned with each other. A radial surface which is defined by an inner radius of the lens system and the length of the lens system spans a delimited volume.
Abstract:
An apparatus for performing real-time analysis of a subterranean formation fluid includes a light source configured to transmit at least a sample signal through a sample of the subterranean formation fluid and a reference signal, at least one photodetector configured to continuously detect the sample and reference signals, and an electronics assembly configured to compensate for drift in the detected sample signal in real-time based on the value of the detected reference signal.