A measuring device can be used under high pressure and can measure impurity particles contained in a hydraulic oil with high accuracy. A flow path hole opening on two facing surfaces of a housing has flat side surfaces. A cavity opens on the side surface, and a cavity opens on the side surface. Light emitted from a light irradiating section irradiates a hydraulic oil flowing in the flow path hole, via a cell disposed in the cavity in a direction substantially orthogonal to a center axis. Light passing through the hydraulic oil is received by a light receiving section via a cell disposed in the cavity opening on the side surface.

A device for measuring the state of a phase change material inside a vessel, the device includes at least one optical fiber arranged inside the vessel, the optical fiber including a cladding around a core, a light source emitting light coupled into a first end of the at least one optical fiber at a wavelength , optical measuring devices for measuring the amount of light at the output at a second end of the at least one optical fiber. The at least one optical fiber also includes a plurality of sections with the cladding removed so that at these sections the core is in direct contact with the phase change material inside the vessel and where the refractive index at the wavelength of the core is higher than that of the phase change material in a first phase and lower in a second phase.

A substance detection method, apparatus, and computer readable storage medium are provided. The method includes determining a substance having the highest matching degree with a spectrum of a to-be-detected substance in a database, wherein corresponding items of the substance in the database at least include a detachable attribute for marking whether the substance is a mixture. If it is determined that the substance is a mixture according to the detachable attribute in the corresponding items of the substance having the highest matching degree, mixture component information of the substance is obtained and displayed. The detachable attribute in the corresponding items of the substance is stored in the database to mark whether the substance is the mixture, so that whether the substance is the mixture can be queried from the database, and after the substance is determined as the mixture, the mixture component information of the to-be-detected substance is further provided.

The present invention relates to a method and an apparatus for measuring the properties of a liquid that exploit the power modulation a laser light beam undergoes due to the retro-reflection of the laser light beam itself towards the laser cavity from which the laser is generated when this laser light is directed towards a transparent conduit through which the liquid for which the properties are to be measured flows.

According to the invention this power modulation is detected by at least one photodiode arranged downstream of the transparent conduit.

An object is to measure absorbance of aqueous cosmetic materials that have not heretofore been studied for absorbance measurement, and particularly to form a uniform layer of thin film in order to ensure accurate measurement without causing these aqueous cosmetic materials, which are O/W emulsions, to undergo phase separation during measurement. As a means for achieving the foregoing, an absorbance measurement method is provided, wherein an absorbent aqueous composition is applied on the surface of a substrate, which surface has been plasma treated, arc-discharge treated, or corona-discharge treated, to achieve a contact angle with pure water of 0 to 70.0 degrees, and the applied absorbent aqueous composition is measured for absorbance.

A method for tuning optical measurements on continuously mixed reactors, wherein a content of the reactor has at least one optically detectable measured variable, which is carried out by at least one optical measuring arrangement, wherein at least one optical measurement is tuned to a form, distribution, or movement state of at least one phase of the reactor content, wherein mixing the reactor content causes local changes in the permittivity within the reactor, which is detected at at least one location having a known distance from the at least one optical measuring arrangement to be tuned based on a permittivity signal, and wherein the detected permittivity signal of at least one location having a known distance from the at least one optical measuring arrangement to be tuned is used to tune at least one optical measurement to the form, distribution, or movement state of the reactor content.

A mounting assembly for a camera on an inspection line, the assembly including a mount having a first and second end, the first end to fix the mount to an inspection line mounting surface, the first end configured to allow flexibility of positioning of the mount on the mounting surface, prior to fixing the mount to the mounting surface, and the second end configured to attach to a camera.

A micro-droplet fluorescence detection system, comprising a microfluidic chip (1), an optical path device, and a movement control device for controlling the chip (1) and an optical path device to move, so that the chip (1) moves relative to the optical path device during a fluorescence scanning detection process of micro-droplets in the chip (1), and the micro-droplets inside the chip (1) remains stationary relative to the chip (1). The micro-droplet fluorescence detection system has advantages of avoiding cross contamination due to closed detection, high detection rate, high throughput and high sensitivity.

A method for tuning optical measurements on continuously mixed reactors, wherein a content of the reactor has at least one optically detectable measured variable, which is carried out by at least one optical measuring arrangement, wherein at least one optical measurement is tuned to a form, distribution, or movement state of at least one phase of the reactor content, wherein mixing the reactor content causes local changes in the permittivity within the reactor, which is detected at at least one location having a known distance from the at least one optical measuring arrangement to be tuned based on a permittivity signal, and wherein the detected permittivity signal of at least one location having a known distance from the at least one optical measuring arrangement to be tuned is used to tune at least one optical measurement to the form, distribution, or movement state of the reactor content.

A method and system of measuring the size distribution of particles within dilute colloids, for example, through variation of the minimum ice-nucleation sizes of particles within the colloid. The system for measuring particles in fluids includes, a sample fluid inlet and an ice nuclei counter communicatively connected to the sample fluid inlet, the ice nuclei counter cooling the sample fluid and measuring particles which form crystals in the cooled fluid. The method for measuring particles in fluid includes the steps of providing a sample fluid, cooling the sample fluid, and measuring particles which form crystals in the cooled fluid.