Abstract:
Systems and methods are disclosed for detecting the concentrations of constituent gases in a sample. Systems may include a sample chamber (206) configured to contain a volume of a gas, a light source (212) configured to emit infrared light through the volume of the gas, a reference channel, a plurality of active channels, and processing circuitry. The reference channel and the active channels can each include a bandpass optical filter (218, 222) configured to receive light from the light source (212) and selectively pass a portion of the light within a unique range of wavelengths, and a photodetector (220, 224) configured to detect infrared light from the light source (212) that passes through the bandpass optical filter (218, 222). The processing circuitry can be configured to calculate the concentrations within the sample gas of a plurality of constituent gases based at least in part on the light detected at each of the photodetectors.
Abstract:
The invention relates to an optoelectronic device for measuring the water content in a plant element (10) and to an apparatus designed to evaluate and monitor in real time the state of hydration of the plant covers (10). It enables measurements to be taken repeatedly at certain time intervals on the same material without damaging or destroying it. The device comprises an optoelectronic probe (1) connected to a measurement module (2), the probe (1) comprising: i) a first light source (3) emitting at a wavelength corresponding to a strong water absorption band; ii) optionally, a second light source (4) emitting at a wavelength close to the first source (3) and weakly absorbed by water; and iii) a photo receiver (5) having a spectral response that corresponds to the emission bands of the first light source (3) or of the first (3) and second (4) light sources, the device including means (16) or modulating the average optical power emitted by the light source or sources (3) at a defined frequency, and means (8) for synchronously detecting the light received by the photoreceiver (5). The probe (1) can be carried on a movable member having two jaws (21, 22) between which the specimen (10) is engaged without being in compressive contact therewith.
Abstract:
A disposable electronic assay device (2) comprises a card-like housing (8) containing a sample receptor (4) for receiving a sample of body fluid containing an analyte to be determined, a sample treatment means (10) for reaction with sample fluid components to yield a physically detectable change for producing an electrical signal which correlates with the amount of analyte in the sample, a detector (20, 22) responsive to the signal, a signal processor (32) connected to the detector (20, 22) for converting the electrical signal to a digital test result output, and visually readable output means (6) connected to the signal processor means (32) for receiving and presenting the test result output.
Abstract:
Bei einem nach dem Abdunklungsverfahren arbeitenden Partikelzähler mit einer Lichtschranke, deren Lichtstrahl einen Meßkanal für ein Fluid quer zur Kanallängsrichtung durchdringt, und einer dem Empfänger der Lichtschranke nachgeschalteten Auswerteelektronik ist die Lichtaustrittsfläche der Lichtschranke durch die Endfläche einer Beleuchtungsfaser (17) und die Lichteintrittsfläche durch die Endfläche einer Empfängerfaser (19) gebildet. Die Endfläche der Beleuchtungsfaser (17) liegt in einer ersten Begrenzungsfläche des Meßkanals (12) und die konzentrisch zu dieser Endfläche angeordnete Endfläche der Empfängerfaser (19) in einer zur ersten Begrenzungsfläche parallelen zweiten Begrenzungsfläche des Meßkanales (12).
Abstract:
The present invention relates to a device and a method for determining the plasma bilirubin level especially in neonates. The system for measuring plasma bilirubin comprises an instrument having a reflectometer, able to detect the plasma bilirubin in a blood sample from which the respective corpuscular portion was removed on a membrane suitable for the purpose and a strip or stick comprising a filter and the membrane. The system consisting of the instrument and the strip can measure plasma bilirubin with an accuracy of +/- 5% at bilirubin concentrations in the range 3-30 mg/dL (approx. 50- 500 μΜοl/L) at haematocrit level up to 60% on blood samples of just 20 - 25 μl.
Abstract:
Vorrichtung zur Bestimmung des Wassergehalts eines Messobjekts (1) mit zumindest einer Mess-Strahlungsquelle (2) und zumindest einer Referenz-Strahlungsquelle (4), die auf eine Messobjektoberfläche (10) gerichtet sind, sowie zumindest einem Detektorelement (3) zur Messung der Intensität der von der Messobjektoberfläche zurückreflektierten Strahlung, wobei bei Verwendung die zumindest eine Mess-Strahlungsquelle (2), die zumindest eine Referenz-Strahlungsquelle (4) und das zumindest eine Detektorelement (3) unmittelbar der Messobjektoberfläche (10) gegenüberliegend angeordnet sind, und wobei eine Vorrichtung zur Druckbeaufschlagung mit Luft- oder Gas vorgesehen ist, mit der im Bereich des Strahlenganges jeweils zwischen der zumindest einen Mess-Strahlungsquelle (2) und der Messobjektoberfläche (10), zwischen der zumindest einen Referenz-Strahlungsquelle (4) und der Messobjektoberfläche (10) sowie zwischen der Messobjektoberfläche (10) und dem zumindest einen Detektorelement (3) eine zwangsbewegte Luft- oder Gasatmosphäre erzeugbar ist.