Abstract:
Oil sensor that comprises a holder (2) to which an elongated crystal (3) is fastened that is transparent to infrared light and with a refractive index greater than the refractive index of the oil (5) to be examined, whereby a light source (7) is provided in the holder (2) at a first end (4A) of the elongated crystal (3) for transmitting light in the infrared spectrum in the elongated crystal (3), and detection means (8) at a second end (4B) of the elongated crystal (3) for measuring the intensity of the light, which during the passage through the elongated crystal (3) undergoes total reflection at a boundary plane (9) at least four times in succession in a contact zone (10) where the elongated crystal (3) comes into contact with the oil (5) to be examined, characterised in that the oil sensor (1) is further provided with at least one temperature sensor (11) to determine the temperature of at least one of the components of the oil sensor (1), and that the part of the light source (7) that can emit light can be heated to a temperature of more than 400°C.
Abstract:
L'invention concerne un dispositif d'analyse par chimie sèche et spectrophotométrie d'échantillons sanguins à disposer sur rotor consommable (10), ledit dispositif comprenant - une source de lumière polychromatique (21), - une ligne optique pour éclairer (22, 23, 24) un volume d'échantillon (E) à analyser avec ladite lumière polychromatique, en sorte de former un faisceau transmis après traversée du volume d'échantillon, - un système de référence pour l'obtention de l'intensité d'au moins une fraction de référence de la lumière polychromatique, - un système optique de distribution (33, 34 ; 133 ; 233, 234 ; 533, 534) transformant ledit faisceau transmis en un faisceau éclairant une pluralité d'au moins deux capteurs optiques (35 ; 135 ; 235 ; 535), chaque capteur mesurant, à une longueur d'onde donnée, l'intensité de la fraction du faisceau lumineux transmis qui lui est appliquée.
Abstract:
This invention relates to an apparatus and a method for performing fluorometric measurements, and particularly to a fully automated apparatus for measuring the fluorescence of a fluorescent tag contained in a test sample for allergy assays. Said apparatus comprising, an excitation radiation source (6) including an incandescent filament (30) cooperating with, an optical unit (4) for providing light of an appropriate wavelength for excitation of the fluorescent tag contained within the test sample, and for collecting the emitted fluorescent radiation without disturbances from the excited wavelength, an electronic unit (2) for controlling the intensity of the incandescent filament (30) of the excitation radiations source (6) and evaluating the emitted fluorescent radiation, said optical unit (4) comprising an L-shaped light channel (34), and a capillary tube (8) movably provided at the centre of the intersection between the two legs of the L-shaped light channel (34) and aligned with the incandescent filament (30), said capillary tube (8) being moveable between two positions and being repeatedly, between each measurement, suppliable with a new test sample.
Abstract:
A gas sample chamber (10) for use in a gas analyzer consists of an elongated hollow tube (21) having an inwardly-facing specularly-reflective surface (22) that permits the tube to function also as a light pipe for conducting radiation from a source (20) to a detector (16) through the sample gas. A number of apertures (24) in the wall of the elongated hollow tube permit the sample gas to enter and exit. Particles of smoke and dust of a size greater than 0.1 micron are kept out of the chamber by use of a semi-permeable membrane (28) that spans the apertures in the hollow tube. Condensation of the sample gas components is prevented by heating the sample chamber electrically to a temperature above the dew point of the component of concern.
Abstract:
On décrit une chambre d'échantillonnage (10) de gaz conçue pour être utilisée dans un analyseur de gaz et qui se compose d'un tube creux allongé (21) pourvu d'une surface interne à réflexion spéculaire (22) ce qui permet au tube de fonctionner comme un guide de la lumière afin de transmettre par conduction un rayonnement à partir d'une source (20) vers un détecteur (16) en traversant le gaz de l'échantillon. Un nombre d'ouvertures (24) dans la paroi du tube creux allongé permet au gaz de l'échantillon d'entrer et sortir. Des particules de fumée et de poussière de taille supérieure à 0,1 micron sont maintenues à l'extérieur de la chambre à l'aide d'une membrane semi-perméable (28) qui couvre les ouvertures du tube creux. On évite la condensation des constituants du gaz de l'échantillon en chauffant la chambre d'échantillonnage électriquement à une température supérieure au point de rosée du constituant en question.
Abstract:
Es wird ein verbessertes Verfahren zur kontinuierlichen optischen Transmissionsmessung, insbesondere im Hinblick auf die Bestimmung der Konzentration von verschiedenen Molekülverbindungen in Flüssigkeiten und Gasen vorgeschlagen, bei dem die optischen Strahlungen von mindestens vier Teilstrahlen ausgenutzt werden und die Emissionswerte der Strahlungsquellen auf konstanten Werten gehalten werden. Ein nach diesem Verfahren arbeitendes System ist derart konzipiert, daß die verschiedenen Wellenlängenbereiche der Strahlungsquellen zur Kompensation von Störeffekten ausgenutzt werden, indem die Strahlung des einen Wellenlängenbereiches bis zum Erreichen eines vorgegebenen Integralwertes integriert wird und das Integral der Strahlung des anderen Wellenlängenbereiches, welches im selben Zeitintervall erreicht wird, als Meßwert dient.
Abstract:
We disclose herein an environmental sensor system comprising an environmental sensor comprising a first heater and a second heater in which the first heater is configured to consume a lower power compared to the second heater. The system also comprises a controller coupled with the environmental sensor. The controller is configured to detect if a measured value of a targeted environmental parameter is present. The controller is configured to switch on at least one of the first and second heaters based on the presence and/or result of the measured value of the targeted environmental parameter.
Abstract:
A light source and a method for its use in an optical sensor are provided, the light source including a resistively heated element. The light source includes a power circuit configured to provide a pulse width modulated voltage to the resistively heated element, the pulse width modulated voltage including: a duty cycle with a first voltage; and a pulse period including a period with a second voltage, wherein: the duty cycle, the first voltage, and the pulse period are selected so that the resistively heated element is heated to a first temperature; and the first temperature is selected to emit black body radiation in a continuum spectral range. Also provided is an optical sensor for determining a chemical composition including a light source as above.
Abstract:
Infrared detection device comprising a gas detection device comprising: a resistive layer, a first portion of which is able to emit infrared radiation able to be absorbed by the gas to be detected, and a second portion of which is thermally coupled to a first element for the thermoresistive transduction of said infrared radiation; a substrate comprising an electronic circuit for controlling and reading the gas detection device; portions of electrically conductive material electrically connecting the first portion and the first thermoresistive transduction element to the electronic circuit, and providing mechanical holding of the first and second portions opposite the substrate so that a distance between the first portion and the substrate is substantially equal to a distance between the second portion and the substrate.