A light scattering particulate matter measuring apparatus is disclosed. The light scattering particulate matter measuring apparatus according to the present invention comprises: a casing provided with an inlet into which outside air flows and an outlet through which is exhausted measured air of which the particulate matter concentration has been measured; an airflow pathway which connects the inlet and the outlet in the casing and along which outside air moves; and an external temperature-humidity sensor which is provided on the outside of the casing and measures the temperature and relative humidity of outside air.

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.

A smoke detector for an aspirating smoke detection system includes a housing that defines a detection chamber, wherein the housing includes a metallic layer optically exposed to the detection chamber; a laser arranged to direct a beam of light through the detection chamber; a photodiode arranged to detect light scattered from the beam of light; and a heater positioned proximate the metallic layer and outside of the detection chamber, wherein the metallic layer is configured to conduct heat from the heater.

A method for true-to-sample measurement by a mobile ingredient analysis system having a housing with a window, an interface for an external reference unit, a display and operating unit, a light source, an optical spectrometer, a camera, an internal reference unit, and an electronic control unit. The method includes: selecting a calibration product suitable for a sample to be examined; performing a plausibility check of the calibration product, an incorrect selection being signaled and an alternative calibration product being selected; outputting measurement conditions comprising the measurement point to be selected and measurement duration for the selected calibration product; capturing measured values of the sample by the spectrometer under the measurement conditions and with simultaneous monitoring of the measurement conditions; processing the captured measured values by means of an electronic control unit, each measured value captured while the measurement conditions were met being declared valid; outputting the measured values deemed valid.

A method for true-to-sample measurement by a mobile ingredient analysis system having a housing with a window, an interface for an external reference unit, a display and operating unit, a light source, an optical spectrometer, a camera, an internal reference unit, and an electronic control unit. The method includes: selecting a calibration product suitable for a sample to be examined; performing a plausibility check of the calibration product, an incorrect selection being signaled and an alternative calibration product being selected; outputting measurement conditions comprising the measurement point to be selected and measurement duration for the selected calibration product; capturing measured values of the sample by the spectrometer under the measurement conditions and with simultaneous monitoring of the measurement conditions; processing the captured measured values by means of an electronic control unit, each measured value captured while the measurement conditions were met being declared valid; outputting the measured values deemed valid.

A smoke detector for an aspirating smoke detection system includes a housing that defines a detection chamber, wherein the housing includes a metallic layer optically exposed to the detection chamber; a laser arranged to direct a beam of light through the detection chamber; a photodiode arranged to detect light scattered from the beam of light; and a heater positioned proximate the metallic layer and outside of the detection chamber, wherein the metallic layer is configured to conduct heat from the heater.

A control apparatus includes a controller configured to execute a condensation prevention process for preventing condensation on a window according to an ambient temperature and humidity of a chamber and a surface temperature of the window at the inside of the chamber, the chamber including the window and housing a light receiving element configured to receive light entering the chamber from the window via a sample for measurement located in a space outside the chamber or a light source configured to irradiate light on the sample through the window.

A chlorophyll fluorescence measuring system having at least one spectrometer coupled to a data logger. The data logger provides direct control of the spectrometer and includes on-board memory for storage of target and reference spectrum data obtained by the spectrometer. The data logger may be coupled to an external computer that receives and analyzes target and reference spectrum data to determine SIF using a spectral fitting algorithm. The system may include a spectrometer aiming system coupled to and controlled by the data logger. The system may also include one or more environmental sensors configured to measure environment variables. The environmental sensors may be coupled to the data logger for control and data storage. The environmental data may be communicated to the external computer for use in the spectral fitting algorithm. The data logger may be connected to a network for remote monitoring and control.

A temperature and humidity chamber type apparatus for taking potential impact marks according to an embodiment includes: a specimen treated with an amino acid reaction reagent to react with potential impact marks to take the potential impact marks; a chamber in which a receiving space for receiving the specimen is secured; a door for opening and closing the chamber; a supporter formed in the receiving space to receive the specimen; an adjuster for adjusting temperature and humidity in the chamber within a set application time range to take the potential impact marks; a display unit attached to one side of the outside of the chamber to display an operation state in the chamber; a power source; a controller for controlling setting of temperature, humidity, and an application time in the chamber; and an input unit in which the controller operates according to a user's input.

A moisture detection system includes a component including a material switchable between a first color and a second color, the component being the first color in a dry condition and the second color in a wet condition. The system also includes at least one light emitting component positioned to emit a color of light onto the component. The system further includes at least one light detection component positioned to receive a color of light after reflection of the color of light emitted by the at least one light emitting component, the color received by the light detection component indicating whether the component is in the dry condition or the wet condition.