Abstract:
A bathyphotometer system is described for detecting photoluminescent signals excited by a grid disposed in a marine vehicle. The system uses photodiodes to convert the optical signals into electrical signals which are sampled, integrated and coupled to output terminals for transmission to a surface host vehicle. In one embodiment the signals are digitized and encoded as FSK tones for transmission to the surface host vehicle.
Abstract:
A turbidity measurement system with an improved thermal behavior is provided. A turbidity measurement system includes an analyzer and one or more turbidity sensors. Each turbidity sensor includes a source of illumination and a semiconductor-based illumination sensor. The dark current of the semiconductor-based illumination sensor is measured when no illumination is provided by the source. This measured dark current is then used to provide a dark current-compensated turbidity measurement.
Abstract:
A bathyphotometer system is described for detecting photoluminescent signals excited by a grid disposed in a marine vehicle. The system uses photodiodes to convert the optical signals into electrical signals which are sampled, integrated and coupled to output terminals for transmission to a surface host vehicle. In one embodiment the signals are digitized and encoded as FSK tones for transmission to the surface host vehicle.
Abstract:
A multichannel fluorosensor includes an optical module and an electronic module combined in a watertight housing with an underwater connector. The fluorosensor has an integral calibrator for periodical sensitivity validation of the fluorosensor. The optical module has one or several excitation channels and one or several emission channels that use a mutual focusing system. To increase efficiency, the excitation and emission channels each have a micro-collimator made with one or more ball lenses. Each excitation channel has a light emitting diode and an optical filter. Each emission channel has a photodiode with a preamplifier and an optical filter. The electronic module connects directly to the optical module and includes a lock-in amplifier, a power supply and a controller with an A/D converter and a connector. The calibrator provides a response proportional to the excitation intensity, and matches with spectral parameter of fluorescence for the analyzed fluorescent substance.
Abstract:
A bioluminescent detector is disclosed for detecting and measuring in situ bioluminescence generated by marine microorganisms. The detector includes a laminar flow chamber, a turbulent flow chamber in fluid communication with the laminar flow chamber, and a photon detector network positioned with the turbulent flow chamber. The detector is dropped over the side of a ship which may be underway and sinks at constant velocity. As the detector descends, ocean water flows through the laminar flow chamber and then into the turbulent flow chamber where fluid turbulence subjects any bioluminescent organisms present to shear stress, causing them to generate photons that are detected by the photon detector network.
Abstract:
Disclosed herein is a self-contained submersible fluorometer designed for the continuous in situ recording of concentrations of materials in an aqueous environment, said materials being stimulated to fluoresce when excited by light of proper wavelengths.
Abstract:
Disclosed herein is a self-contained submersible fluorometer designed for the continuous in situ recording of concentrations of materials in an aqueous environment, said materials being stimulated to fluoresce when excited by light of proper wavelengths.
Abstract:
Die Erfindung bezieht sich auf ein Prozess-Analysegerät (10) zur Bestimmung eines Analyts in Wasser und weist ein Basismodul (14) und ein austauschbares Kartuschenmodul (12) auf. Das Basismodul (14) weist keine Fluidik auf, und weist insbesondere einen Pumpenantrieb (16, 16') und einen Analyt-Sensor (20) ohne Fluidik-Messstrecke (60) auf. Das Kartuschenmodul (12) weist die gesamte Fluidik auf, und weist insbesondere einen Flüssigkeits-Vorratstank (40, 41), eine antriebslose Pumpmimik (36, 36'), die die Flüssigkeit aus dem Vorratstank (40, 41) pumpt, und die Fluidik-Messstrecke (60) des Analyt-Sensors (20) auf. Bei in das Basismodul (14) eingesetztem Kartuschenmodul (12) wird die Pumpmimik (36, 36') durch den Antrieb (16, 16') angetrieben und ist die Fluidik-Messstrecke (60) mit dem Analyt-Sensor (20) funktional verbunden.
Abstract:
Die Erfindung bezieht sich auf ein Wasseranalysegerät (10) mit einer pneumatisch betätigten Mehrkammer-Peristaltikpumpe (18). Die Peristaltikpumpe (18) weist eine Grundplatte (40) mit mehreren proximal offenen Pumpenkammern (41-43) auf der proximalen Seite der Grundplatte (40), eine die Pumpenkammern (41-43) verschließende, flüssigkeitsdichte und elastische Pumpenmembran (46) auf der proximalen Seite der Grundplatte (40), und eine Deckplatte (48) auf der Pumpenmembran (46) auf, wobei die Deckplatte (48) im Bereich der Pumpenkammern (41-43) jeweils einen pneumatischen Aktuatorkanal (51-53) aufweist, der zur Betätigung der Pumpenmembrane (46) an eine Überdruckquelle (30) anschließbar ist. Zwischen zwei Pumpenkammern (41, 42; 42, 43) ist jeweils ein Verbindungskanal (71, 73) vorgesehen, der auf der distalen Seite der Grundplatte (40) als Nut (70, 72) ausgebildet ist, wobei auf der distalen Seite der Grundplatte (40) im Bereich der Verbindungskanal-Nut (70, 72) eine separate Nutabdeckung (80) vorgesehen ist, die die distale Öffnungsseite der Verbindungskanal-Nut (70, 72) verschließt.
Abstract:
An apparatus (20) for placement on or in a body of water (22) for hyperspectral imaging of material (24) in the water comprises an artificial light source and a hyperspectral imager. These are arranged so that in use light exits the apparatus (36) beneath the surface of the water and is reflected by said material (24) before re- entering the apparatus (38) 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.