摘要:
A chemical sensor arrangement is provided with at least two two-terminal metal oxide sensors (10,10') with a different electrode spacing and a processing unit combining measurements of the at least two sensors to eliminate contact effects and determine gas concentrations.
摘要:
A portable electronic device comprises a housing (2) and chemical sensor (12) arranged inside the housing (2) which chemical sensor (2) is adapted to measure a property of different analytes. The device further comprises an opening (211) in the housing (2) for exposing the chemical sensor (12) to a fluid to be analyzed.
摘要:
A pressure sensor, particularly an absolute pressure sensor, and methods for manufacturing the pressure sensor are described with the sensor having a deformable membrane (21) providing a separation between a cavity, which for an absolute pressure measurement is kept at an essentially constant pressure, and a port open to the outside of the sensor, with the cavity having a measuring chamber with an associated sensing device to transfer the response of the deformable membrane (21) to the pressure at the port into a signal capable of being processed by a processing circuit being mounted onto a substrate (10) with the sensor being formed essentially from a stack of at least three layers with a first layer (1) including the substrate and the processing circuit, the second layer(2) the membrane and the third layer (3) being a thick protective layer adapted for use as a handling layer and having the port through it.
摘要:
In a method for manufacturing a chemical sensor (1) with multiple sensor cells (11), a substrate (5) is provided and an expansion inhibitor is applied to the substrate (5) for preventing a sensitive material (9) to be applied to an area on the substrate (5) for building a sensitive film (7) of a sensor cell (11) to expand from said area. The sensitive material (9) is provided and the sensitive film (7) is built by contactless dispensing the sensitive material (9) to said area.
摘要:
A portable electronic device comprises a housing (2) and chemical sensor (12) arranged inside the housing (2) which chemical sensor (2) is adapted to measure a property of different analytes. The device further comprises an opening (211) in the housing (2) for exposing the chemical sensor (12) to a fluid to be analyzed.
摘要:
To process a plurality of sensor devices, such as humidity sensors or gas sensors, the sensor devices are run through a testing station (10) and a turret handler (1). In order to increase throughput of the testing station (10), several test cycles are operated simultaneously in phase-shifted manner. The sensor devices are e.g. sequentially fed onto trays (13) of the test station (10), on which they are assembled in batches. Each batch is subjected to a test cycle. After the test cycle, the sensor devices of a batch are sequentially fed back to the turret handler (1).
摘要:
A system for storing ammonia comprises a combined gas and flow detector (4) that is able to measure a flow of ammonia as well as to detect gases other than ammonia. The system further comprises thermally activatable ammonia stores (1), which can be activated to release ammonia upon heating. When the ammonia stores (1) are not heated, the system is below ambient pressure and any leak will cause foreign gas to enter the system. Therefore, the gas detector (4) is used to detect the presence of such foreign gas, which allows to detect leaks. The gas detector (4) is a thermal detector using a single heater (6) and two temperature sensors (7, 8) for detecting gas flow as well as foreign gas.
摘要:
The humidity detector comprises a housing (14) adapted to hold a humidity sensor (2) towards the windscreen (20) of a vehicle or any other type of window. A flexible printed circuit board (1) is arranged between the humidity sensor (2) and the windscreen and provides a connection between the humidity sensor (2) and further circuitry of the detector. The humidity sensor (2) is located under a cap (8), which is engaged by a glider member (11). A spring (18) pushes the glider member (11) towards the windscreen (20).
摘要:
Die Vorrichtung zur Messung des Flusses eines Fluids besitzt einen Hauptkanal (1) und einen zum Hauptkanal (1) parallel geschalteten Nebenkanal (2). Der Nebenkanal besteht aus einem ersten Abschnitt (2a) mit einer Blende (3) und einen zweiten Abschnitt (2b) mit zwei parallelen Unterkanälen (4a, 4b). Im ersten Abschnitt (2a) dominieren turbulente Strömungseffekte, während im zweiten Abschnitt (2b) laminare Strömungsverhältnisse herrschen. Durch ausreichend starke turbulente Effekte im Nebenkanal (3) kann erreicht werden, dass das Teilungsverhältnis der Flüsse in Haupt- und Nebenkanal nahezu unabhängig von den Fluideigenschaften und unabhängig von der Durchflussmenge wird. Dank der Verwendung zweier paralleler Unterkanäle können im zweiten Abschnitt hohe Flussraten und somit starke turbulente Effekte erzielt werden, ohne dass der Messbereich des Sensors überschritten wird.