Abstract:
A detection module of an autonomous detection system for in situ monitoring floating polymer particles and phytoplankton in sea water. The detection module is combined with a floating body, and a communication module with an antenna, and is configured for detecting polymer particles and phytoplankton such as algae. The detection module comprises: a detection area for a water sample, notably a salty water flow with polymer particles and/or phytoplankton; ultraviolet light emitting means configured for emitting ultraviolet light in the detection area, light sensing means configured for sensing light from the detection area in order to detect polymer particles and/or phytoplankton such as cyanobacteria; an energy generating module configured for powering said detection module. The UV emitting means comprise a low power consumption UV LED. A detection process, and a use of an UV light source for removing a biolayer in the detection area.
Abstract:
Methods and systems for detecting oil proximate to a body of ice is disclosed herein. An example system includes an energy emitter disposed proximate to a first surface of a body of ice. An energy detector is disposed proximate to a second surface of the body of ice. The energy detector is used to map a distribution of oil proximate to the body of ice based, at least in part, on differences in energy transmitted through the body of ice.
Abstract:
The disclosure describes various embodiments that utilize optical sensor to characterize attributes of a liquid. Some sensor configuration continue to function properly even after scaling begins to reduce the visibility of photochemical sensors that measure the attributes of the liquid. This allows significantly longer continuous operating periods and lower maintenance costs.
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.