Devices, methods, systems, and computer-readable media for a dual wavelength source gas sensor are described herein. One or more embodiments include a gas sensor, comprising: a dual wavelength source to transmit a first wavelength and a second wavelength via an optical path, wherein a gas is present through the optical path, a detector to receive the first wavelength and the second wavelength via the optical path, and a computing device coupled to the detector to determine an determine a signal intensity for the first wavelength and the second wavelength.

A system for measuring the blood loss comprises a measuring device that determines a hemoglobin concentration of fluid within a container utilizing a light source and a light detector. The container receives blood and other fluids from a patient during a medical procedure. Light from the light source is passed through the blood and other fluids in the container and is detected by the light detector. Based upon a magnitude of light detected, a hemoglobin concentration of the fluid in the container can be determined. A volume-measuring device determines the volume of blood and fluid in the container. Knowing the hemoglobin concentration and volume of fluid in the container, the volume of patient blood loss in the container can be determined. The blood loss measuring device in combination with infusion systems maintains a real-blood volume status so that proper infusion of blood, crystalloid and/or colloid solutions occurs.

A bilirubin concentration measurement system according to the present invention includes: a sensor device attachable to a subject; and a terminal device capable of wirelessly communicating with the sensor device. The sensor device includes: a light emitting element that emits blue light; a light emitting element that emits green light; a light detection element that detects reflected light that is the blue light having been incident on skin of the subject and been reflected, and detects reflected light that is the green light having been incident on the skin of the subject and been reflected; and a communication unit that wirelessly transmits information about intensities of the reflected light detected by the light detection element. The terminal device includes: a communication unit that receives the information about the intensities of the reflected light transmitted from the sensor device; and a computing unit that calculates a bilirubin concentration using the information about the intensities of the reflected light.

A blood coagulation analyzer comprises: a light irradiation unit configured to apply light onto a container configured to store a measurement specimen containing a sample and a reagent, and comprising: light sources including a first light source configured to generate light of a first wavelength for blood coagulation time measurement, a second light source configured to generate light of a second wavelength for synthetic substrate measurement, and a third light source configured to generate light of a third wavelength for immunonephelometry measurement; and optical fiber parts facing the respective light sources; a light reception part configured to receive light transmitted through the container; and an analysis unit configured to analyze the sample using an electric signal outputted from the light reception part.

A detector arrangement for a blood culture bottle incorporating a colorimetric sensor which is subject to change of color due to change in pH or CO.sub.2 of a sample medium within the blood culture bottle. The detector arrangement includes a sensor LED illuminating the colorimetric sensor, a reference LED illuminating the colorimetric sensor, a control circuit for selectively and alternately activating the sensor LED and the reference LED, and a photodetector. The photodetector measures reflectance from the colorimetric sensor during the selective and alternating illumination of the colorimetric sensor with the sensor LED and the reference LED and generates intensity signals. The reference LED is selected to have a peak wavelength of illumination such that the intensity signals of the photodetector from illumination by the reference LED are not substantially affected by changes in the color of the colorimetric sensor.

A system (100) for detecting tissue inflammation, and gingivitis specifically, including a light emitter (102) configured to emit light at a tissue region (104) within a user's mouth; a light detector (106) configured to detect optical signals diffusely reflected through the tissue region over a period of time; a controller (130) configured to: determine a slope signal (Q) based on at least two signals (R(λ.sub.1), R(λ.sub.2)) from the optical signals, the at least two signals including at least one signal from a hemoglobin-dominated wavelength range; determine one or more characteristics of the slope signal; and select a best measurement signal based on the one or more characteristics of the slope signal. The system further includes a user interface (116) configured to provide information regarding a position of a probe for accurate detection of tissue inflammation based on the one or more characteristics of the slope signal.

A material analytical sensor includes an emitter that irradiates a material with irradiation light including a wavelength region related to estimation of an amount of a component of the material, a controller that controls an irradiation cycle of the irradiation light, a receiver that receives reflected light from the material to output as a pulse signal and receives disturbance light to output as a noise signal, an integrator that samples N pulse signals during a predetermined period and integrates the sampled N pulse signals to obtain a first integrated value, and samples N noise signals during a same period as the predetermined period with a same cycle as the irradiation cycle and integrates the sampled N noise signals to obtain a second integrated value, and an extractor that deducts the second integrated value from the first integrated value to extract an amount of the reflected light.

To provide a concentration measurement method that makes it possible to accurately, quickly, and non-destructively measure the concentration of a predetermined chemical component to a trace level of concentration by a simple means, that makes it possible to accurately and quickly measure the concentration of a chemical component within an object to be measured to a nano-order trace concentration level in real time, and that has a versatility which makes it possible to adapt said concentration measurement method to a variety of situations and embodiments. A time sharing method is used to irradiate an object to be measured with each of light of a first wavelength and light of a second wavelength having different light absorption rates with respect to the object to be measured, light of each of said wavelengths that arrives optically through the object to be measured as a result of irradiating with the light of each of said wavelengths is received by a shared light reception sensor, a signal relating to light of the first wavelength and a signal relating to light of the second wavelength are output from the light reception sensor in accordance with the received light and a differential signal of said signals is formed, and the concentration of a chemical component in the object to be measured is derived on the basis of the differential signal.

An analyzer and a detection system are provided. The analyzer includes a chip placement structure and at least one detector unit. The chip placement structure is configured to place a detection chip, and the detection chip is provided with at least one detection area. The at least one detector unit is configured to detect one or more detection areas of the detection chip in a case where the detection chip is placed on the chip placement structure.

An apparatus for analyzing a substance of an object in a non-invasive manner is provided. The apparatus for analyzing a substance of an object includes: a sensor part including an image sensor, and a plurality of light sources disposed around the image sensor; and a processor configured to drive the plurality of light sources to obtain absorbance of each pixel of the image sensor based on an intensity of light received by each pixel, to correct the absorbance of each pixel based on a distance between the plurality of light sources and each pixel, and to analyze a substance of an object based on the corrected absorbance of each pixel.