Abstract:
PROBLEM TO BE SOLVED: To prevent data measured by an infrared spectrophotometer from being adversely affected by moisture vapor. SOLUTION: An internal space receiving therein an optical system of an auxiliary device is sealed by providing tubes 35, 36 and the like to shield a space where measurement light passes from ambient air, and a dehumidifier 38 is provided in the space where the measurement light passes. The dehumidifier is disposed in a relatively narrow space, so that the space where the measurement light passes can be efficiently dehumidified within a short period of time so as to reduce humidity in the space to suppress absorption of moisture vapor which would otherwise occur on an optical path. This makes it possible to prevent a negative influence of moisture vapor on measurement data, while reducing a standby time due to the dehumidification. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
The invention is directed to a nephelometric turbidimeter (10) for measuring a turbidity of a liquid sample (13) in a transparent sample cuvette (12), the turbidimeter (10) comprising a cuvette chamber (16) defined by a cuvette chamber housing (14) wherein the sample cuvette (12) is arranged, and a drying apparatus comprising : a cuvette chamber inlet opening (38) for venting the cuvette chamber (16) and a cuvette chamber outlet opening (42) for deventing the cuvette chamber (16), an air circulator (49) for pumping air from the outlet opening (42) to the inlet opening (38), and a drying body (32) arranged in the drying path between the outlet opening (42) and the Inlet opening (38). This arrangement allows to actively and dynamically control the air humidity within the cuvette chamber (16).
Abstract:
A system for sensing the level of moisture contamination of refrigerant material flowing in a flow circuit of a heat transfer apparatus, such as an automobile air conditioner, includes a sensor (10). The sensor has a body (12) housing a light emitting diode (30), a sensing photo diode (32), and a reference photo diode (34). The sensor further includes a sight glass (20). A substrate (58) which is coated with a dye treated cobalt bromide salt, is positioned in the refrigerant material adjacent to the sight glass. The substrate changes color responsive to the degree of moisture contamination in the refrigerant material. The light emitting diode produces a red light which is reflected off the substrate and is sensed by the sensing photo diode. The difference in intensity sensed by the sensing photo diode, and the reference photo diode which senses the intensity of the light emitting idode on a direct path, is determined by electrical circuitry which produces an output signal representative of the degree of contamination.
Abstract:
The invention relates to a measurement apparatus for measuring the concentration of a gaseous substance. The apparatus comprises a light source, a light sensor, and a housing comprising at least one first housing member having a low thermal conductivity. A light path is formed from said light source to said light sensor, wherein the light path passes through a measurement region within said housing. The light source is configured to emit light with a spectral distribution such that said light is absorbed by said gaseous substance. Said light sensor is configured to receive the light emitted by the light source after it has passed through the measurement region. The first housing member comprises a thermal shielding region facing said measurement region on its one side and said light sensor on its other side, and is configured to permit the passage of light.
Abstract:
A sample analyzing apparatus for performing an optical-based measurement on a sample includes a housing, a first light source, excitation optics, a first light detector, emission optics, and a monitoring system, all of which are disposed in the housing. The monitoring system is configured for monitoring a movable component disposed in the housing. The monitoring system includes one or more light sources for illuminating the movable component, and one or more light detectors for detecting light reflected from the movable component in response to being illuminated.
Abstract:
The invention relates to a microplate reader and a respective method, wherein the microplate reader comprises at least one measuring device and a holding device for accommodating at least one microplate and for positioning the samples-containing wells of this(these) microplate(s) in relation to the at least one measuring device. The at least one measuring device is used for detecting light which is emitted by samples in wells of a microplate inserted in this microplate reader and/or which is influenced by samples transilluminated by light in wells of a microplate inserted in this microplate reader. The microplate reader comprises a control unit for controlling the temperature of a gas atmosphere surrounding the wells containing the samples of microplates used in this microplate reader.
Abstract:
An exemplary optical sensor element for use in an optical sample analyzing apparatus, includes a housing that includes at least one optical sensor component. A housing body and a housing lid are removably connected to the housing body so that in an assembled state, the housing body and the housing lid form a fluid-tight housing. The housing lid is equipped with replaceable moisture control elements.
Abstract:
An infrared radiation source for gas detection, with a thin layer infrared radiator that is arranged in the interior chamber of a protective housing that includes a support surface for the thin layer infrared radiator and an exit window for the infrared radiation arranged at a distance opposite the support surface. The thin layer infrared radiator includes a platinum layer and at least one structurally defined de-gassing canal with an entry opening and an exit opening that leads from the interior chamber of the protective housing to the outside. For non-critical applications, the de-gassing canal is not sealed. For critical applications, it may be sealed by a sealing membrane that is water impermeable, water vapor permeable and open for gas diffusion, with the sealing membrane preferably being semi-permeable.