Abstract:
The present disclosure describes a device and corresponding method for measuring tar in a tar environment, e.g., a tar producing environment such as a stove or a combustion engine, based on UV absorption spectroscopy. A first measurement along an optical path in the tar environment is performed at a wavelength less than 340 nm at which both tar and non-tar elements absorb. This measurement is compensated for non-tar absorption by means of a second measurement at a wavelength equal to or greater than 340 nm at which tar does not absorb. From the non-tar compensated absorbance value a measure of tar in the tar environment is derived and an air intake in the tar environment is regulated based on the measure of tar.
Abstract:
The sensor element (102) includes a light input (120) configured to receive input light, a sample chamber (108) configured to accommodate a sample (124), and at least one polymer waveguide optically coupling the light input with the sample chamber, the at least one polymer waveguide (126) including a first contact portion (112) and a second contact portion (114), wherein at least a portion of the second contact portion may be arranged in the sample chamber. The second contact portion may include a different structure than the first contact portion so that a change of the light intensity of the input light passing through the second contact portion may be caused due to an interaction between the input light passing through the second contact portion and the sample, wherein the change of the light intensity of the input light passing through the second contact portion may be different from the change of the light intensity of the input light passing through the first contact portion.
Abstract:
A method and device structure are provided which enable an archive sample to be collected and detached relative to a device within which a series of processes, such as PCR are being provided. A chamber structure and method of use are provided in which a controlled and precise volume is obtained by control of the relative resistance to flow through various channels.
Abstract:
Disclosed are a method and a device for optically determining state variables inside a container (1) for liquefied gases. In said method and device, light emitted by an illumination unit (2) travels within an optical waveguide (7, 9) to a contact point (33) with the content of the container (1) and is partially reflected there, the intensity of the reflected light is measured by an image sensor (4), and a state variable is determined from said intensity. In order to create a comprehensive "image" of the state variables in the container and of the container content, several optical waveguides (29, 29') are guided to contact points (33) which are distributed within the container (1) and form measurement points (9.1, 9.2, 9.3,...9.n). Locally assigned state variables (refractive index, density, temperature, etc.) of the container content are determined from the measured values obtained at the measurement points (9.1, 9.2, 9.3,..., 9.n) and are evaluated along with the spatial coordinates of the measurement points (9.1, 9.2, 9.3,..., 9.n) in the container (1).
Abstract:
The disclosure relates to a portable and/or handheld bioagent detector and methodology described herein that is based in part on advanced Raman Chemical Imaging ("RCI") technology. According to one embodiment of the present disclosure, the detection system may include a fiber array spectral translator ("FAST") and may also include a probe which may include a complementary metal oxide semiconductor (CMOS) camera. The probe alleviates the need to place the main instrument close to an unconfined release of a potentially hazardous material and facilitates analysis of a sample that is situated in a hard-to-reach location while minimizing contamination of the detector and operator.