An apparatus and method, the apparatus comprising: an information electrode; a ground electrode; a photo-resistive element configured to enable the information electrode to be connected to the ground electrode; and wherein the apparatus is configured to enable a sensor element to be positioned overlaying the photo-resistive element such that a change in optical properties of the sensor element controls the connection between the ground and information electrodes.

An apparatus includes a flow cell, an imaging assembly, and a processor. The flow cell includes a channel and a plurality of reaction sites. The imaging assembly is operable to receive light emitted from the reaction sites in response to an excitation light. The processor is configured to drive relative movement between at least a portion of the imaging assembly and the flow cell along a continuous range of motion to thereby enable the imaging assembly to capture images along the length of the channel. The processor is also configured to activate the imaging assembly to capture one or more calibration images of one or more calibration regions of the channel, during a first portion of the continuous range of motion. The processor is also configured to activate the imaging assembly to capture images of the reaction sites during a second portion of the continuous range of motion.

The present disclosure describes a method, a system, and a computer program product of indicating a status of an analytical instrument on a screen of the analytical instrument. In an embodiment, the method, the system, and the computer program product include receiving data from an analytical instrument monitoring a liquid sample, segmenting the received data into data segments for at least two characteristics of at least one of the instrument, the sample, and an operating environment of the instrument, analyzing each of the data segments for the at least two characteristics, retrieving threshold values for the at least two characteristics from a computer data source, calculating at least one status of at least one of the instrument, the sample, and the operating environment, with respect to the analyzed data segments and the threshold values, and displaying the at least one status on a display of the instrument.

A bubble measurement system includes a bubble detector including a vessel having a flow path configured to receive a flow of fluid including air bubbles from a bubble generator and an imaging system. The imaging system includes an imaging device for imaging the fluid and air bubbles in the flow path of the vessel of the bubble detector. The imaging system has an imaging controller coupled to the imaging device and receiving images from the imaging device. The imaging controller processes the images to measure bubble size of each air bubble passing through the bubble detector. The imaging controller includes a pairing module comparing successive images and the air bubbles in successive images to measure all bubbles flowing through the vessel.

An apparatus is provided that includes a plurality of reflectors arranged over an area, and a plurality of transceivers. A first of the transceivers is configured to transmit radiation at each of the plurality of reflectors at a first wavelength and a second wavelength, and receive radiation reflected from each of the plurality of reflectors. A second of the plurality of transceivers is configured to transmit radiation at each of the plurality of reflectors at a third wavelength and a fourth wavelength and receive radiation reflected from each of the plurality of reflectors. The apparatus includes a processor configured to calculate a change in concentration of a gas within the area between a first time and a second time based upon signals received from the transceivers.

The disclosure provides a system for electromagnetic monitoring of active cracks in a concrete dam. The system includes at least four electromagnetic signal acquisition devices and a main control module. Each electromagnetic signal acquisition device includes: an electromagnetic monitoring sensor, an electromagnetic signal acquisition module, a power supply module and a first wireless communication module, for collecting and extracting electromagnetic radiation signals generated by the active cracks in the concrete dam. The main control module includes: a second wireless communication module, a CPU, a data storage unit and a data display unit, for processing the electromagnetic radiation signals received by the second wireless communication module, positioning locations of the active cracks and quantifying sizes of the active cracks.

A system including an optical signal detector and a controller operatively coupled to the optical signal detector and configured to determine an operational performance status of the optical signal detector. The optical signal detector includes a detection channel having a light source and a sensor, where the detection channel is configured to emit and focus light generated by the light source at a detection zone and to receive and focus light on the sensor. The optical performance status of the optical signal detector is based on a measured characteristic of light focused on the sensor while a non-fluorescent surface is in the detection zone and/or a measured characteristic of light focused on the sensor while a void is in the detection zone.

A device may determine a calibration value for a spectrometer using light from a first light source; deactivate the first light source after determining the calibration value; perform measurement with regard to a sample based on the calibration value, wherein the measurement of the sample is performed using light from a second light source; determine that the calibration value is to be updated; and update the calibration value using the light from the first light source.

A refractometer and a method for measuring refractive index is disclosed. The refractometer comprises a light source, a reflecting module, a lens module, an array sensor, and a processor, wherein the reflecting module is configured to receive optical beams from the light source, the reflecting module comprises a detection surface configured to totally reflect at least part of the optical beams; the lens module is configured to converge optical beams from the detection surface onto a focal plane of the lens module; and the array sensor is located on the focal plane of the lens module.

The analysis device includes processing circuitry configured to measure absorbances at multiple measurement positions from one end to the other end in the width direction of a cuvette which is open at one end in the height direction; acquire blank data measured by the processing circuitry in a state where a blank liquid is placed in the cuvette, and sample data measured by the processing circuitry in a state where a reaction liquid in which a sample and a reagent are reacted is placed in the cuvette; and perform correction to align measurement positions of the blank data and the sample data based on correlation processing of the measurement positions of the blank data and the sample data.