Abstract: A diffusive gradients in thin films (DGT) test device for lake water, including: a floating ball and a plurality of water sampling units. A DGT detection device, a water quality detection device with a multi-parameter probe, and a water sampling device are disposed in each of the water sampling units. The water sampling device includes: a plurality of sampling bottles, each of the sampling bottles is provided with an inlet pipe and an exhaust pipe, each of the inlet pipes and exhaust pipes is provided with a one-way solenoid valve; a peristaltic pump, a water sample outlet of the peristaltic pump communicates with the inlet pipes of the plurality of sampling bottles via a multi-way connector; the exhaust pipes of the plurality of sampling bottles are connected to an exhaust manifold via a multi-way connector; a control device connected with the peristaltic pump and each of the one-way solenoid valves.

Abstract: A sensor offset voltage compensation circuit includes a programmable gain amplifier (PGA) having an input loop configured to receive the signal output by a sensor (e.g., a voltage generated a sensor resistive bridge of a pressure sensor) and an output loop configured to furnish an output signal having a voltage that is greater than the input voltage. An offset compensation voltage is applied to at least one of the input loop or the output loop of the PGA to at least substantially cancel the zero-quantity offset voltage of the sensor from the output voltage.

Abstract: This liquid surface detection device comprises: a liquid retention part in which hydrogen peroxide water is retained, the hydrogen peroxide water to be atomized by a vibrating plate in which a through-hole is provided; a float positioned inside the liquid retention part; and a sensor that detects, via the float, the arrival of the liquid surface of the hydrogen peroxide water retained in the liquid retention device at a prescribed position.

Abstract: A modular multi-sensor fire detector including an evaluation unit having a housing, a plurality of sensor heads, and at least one adapter. At least one of the plurality of sensor heads has at least one hazard parameter conductor with a mounting tube having a proximal end, a distal end and a fastener at the proximal end. The at least one adapter is attached to the mounting tube and includes a first fastening point, a second fastening point and a third fastening point. The first fastening point for connection to the fastener on the mounting tube, the second fastening point for connection to a capping device, and the third fastening point for connection to a wall.

Abstract: The present disclosure relates to a chromatographic analysis system, a chromatogram detection and analysis method and an electronic device, belonging to that technical field of chromatographic analysis, wherein the system comprises a data acquiring unit, which is configured to acquire raw data generated by a chromatographic analysis instrument; an analysis processing unit, which is configured to analyze the raw data based on the analysis operation configured by a user to obtain analysis data; a storing and managing unit, which is configured to store raw data and analysis data, and store method parameters and management data of the analysis system; a client unit, which is configured to provide the interactive interface of the system to a user; wherein the storing and managing unit comprises a first database for storing raw data and analysis data and a second database for storing method parameters and management data of the analysis system.

Abstract: Methods and apparatus for calibrating microwave reflection sensors in fluid flow measurement devices are described. A calibration apparatus has a reservoir member with a fill opening, the reservoir member defining a reservoir in an interior thereof, the fill opening being operable to fill the reservoir with a calibrant fluid; a tube coupled to a side of the reservoir member and in fluid communication with the reservoir, the tube having a first end coupled to the side of the reservoir and a second end, the tube having a length matched to an inner diameter of a pipe section of the flow measurement device to extend across the inner diameter; and a seal member disposed at the second end of the tube for scaling the second end of the tube against a sensing surface of the microwave reflection sensor installed in the pipe section of the flow measurement device.

Abstract: A multi-point air sampling system that can use a field reference subsystem to process sensor feedback to efficiently and reliably monitor and improve air quality within a space. The field reference subsystem can interface with multiple types of multi-point air sampling systems to ensure that sensors are operational and producing accurate measurements. Included within the field reference subsystem can be one or more permeation sources for generating test gases used to evaluate the integrity of the sensors, a processor for receiving the results of the test-gas evaluations to recurrently verify the operation level of each sensor, and a reporting system for carrying out actions in response to the recurrent verification of the sensors.

Abstract: A sensor assembly includes a housing and multiple sensor array segments. A first sensor array segment includes an antenna. A second sensor array segment has a soil temperature sensor, an electrical conductivity (EC) sensor, a moisture sensor, an ion-sensitive field effect transistor (ISFET) nitrate sensor for detecting nitrates in adjacent soil, an ISFET phosphate sensor for detecting phosphates in adjacent soil, an ISFET potassium sensor for detecting potassium in adjacent soil, and an ISFET pH sensor for detecting pH in adjacent soil, and a reference electrode electrically coupled to the first sensor array segment and to the second sensor array segment. The first sensor array segment and the reference electrode can be disposed on opposite sides of the second sensor array segment.

Abstract: The present disclosure relates to a bipolar plate for an electrochemical system, comprising two separator plates which are connected to one another, at least one of the separator plates having a plate body and at least one tab which is formed in one piece with the plate body and can be separated from the plate body via a predetermined breaking point. The disclosure additionally relates to a retention sample for a bipolar plate or flow plate, to a flow plate, to a system, and to a method for producing and testing a bipolar plate or flow plate.

Abstract: A method for generating an abnormal state detection model, that includes: receiving first and second normal state signals detected, for a predetermined time by first and second sensors, respectively; generating a normal state data set based on the first and the second normal state signals; recognizing first and second variable values; generating a first abnormal state signal by applying the first variable value to an impulse function and a second abnormal state signal by applying the second variable value to a Gaussian distribution function; generating an abnormal state data set based on the first and second abnormal state signals; generating a detection model learning set for generating an abnormal state detection model by combining the normal state data set and the abnormal state data set; and generating an abnormal state detection model based on the detection model learning set.

Abstract: The system and method for a multi-element, ultra-low SWaP chemical concentrator incorporating Applicant's own open cell foamed adsorbent material which allows high volume sampling (e.g., liters per minute) to achieve low detection limits (ppt) using high-volume, low-pressure air sources (i.e. fans or blowers) rather than pumps. The device delivers the sample directly to an analyzer without the need for a typical intermediate cryogenic trapping step. In one example, a rotary style concentrator comprises four individual foam elements. Each element can be individually heated to desorb analytes.

Abstract: A suppressor device for an ion chromatograph is provided between a separation column and a detector of an ion chromatograph. An electrodialysis suppressor includes a first flow path to which an eluate flowing from the separation column is supplied, a second flow path to which a regeneration liquid is supplied, an ion exchange membrane provided between the first flow path and the second flow path and an electrode to which a voltage is applied. A power supply circuit that applies a voltage to the electrode is turned off in a case in which an eluate is not supplied to the first flow path of the electrodialysis suppressor.

Abstract: According to one embodiment, a chemical sensor includes a sensor element. The sensor element includes a sensitive film and a treatment material. Physical properties of the sensitive film vary as bonding of a target substance to the sensitive film. The sensor element is configured to detect the variation in the physical properties. The treatment material is configured to carry out a treatment onto the target substance before the target substance bonds to the sensitive film.

Abstract: Embodiments of this application provide a method and system for measuring motor damping. In the method for measuring motor damping, a driving signal is generated to drive a to-be-tested motor to operate, and at a cut-off moment of the driving signal, the to-be-tested motor enters a free damping state and a turn-off signal is generated at this moment to cut off a test circuit of the to-be-tested motor. In this way, an acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state can be acquired, and damping of the to-be-tested motor is obtained by using the acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state, thereby realizing the measurement of the damping of the to-be-tested motor.

Abstract: A biochemical sludge and physicochemical sludge separate sampling device for identifying attributes of sludge, includes a sludge extraction assembly, and a biochemical reaction tank and a physicochemical reaction tank which are respectively connected to the sludge extraction assembly through connection pipelines. The sludge extraction assembly includes an outer shell, a porous plate clamped to an inner bottom of the outer shell, and a sampling dish. A drain pipe is arranged at a lower end of the outer shell. The sampling dish is provided with a biochemical sludge cavity and a physicochemical sludge cavity. Filter cloth is arranged at inner bottoms of the biochemical sludge cavity and the physicochemical sludge cavity. Electric extrusion stems are arranged at an inner top of the outer shell; and the electric extrusion stems are provided with extrusion plug plates.

Abstract: A combustion analyzer system includes an analyzer unit, a primary analysis probe and one or more remote probes. The analyzer unit includes a condensation removal unit and two or more electrochemical sensors to detect at least oxygen and carbon monoxide. The analyzer unit or the primary analysis probe include a means for condensing and eliminating liquid in the combustion gas to be analyzed.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for integrating a monitoring system with one or more air quality sensors. The method includes receiving data indicating a level of volatile organic compounds within an area, determining an increase in the level of volatile organic compounds within the area, receiving video data that shows the area, detecting, from the video data, a new item of furniture within the area, sending a notification that indicates an increase in the level of volatile organic compounds is likely caused by the new item of furniture.

Abstract: An improved gas chromatography system is presented. The system comprises: an enclosure having an inlet and an outlet, such that the ventilation flow is from the inlet to the outlet; a chamber disposed in the enclosure; a monolithic gas analyzer disposed in the chamber and a temperature control unit disposed in physical contact with the chamber. The monolithic gas analyzer operates to separate and detect molecules from a gas; whereas, the temperature control unit is configured to control temperature inside the chamber.

Abstract: Methods and systems for the detection and quantification of multiplicity of ionic analytes comprising CrO42?, AsO43?, SeO42?, and ClO4?, and optionally F?, Cl?, NO2?, NO3?, SO42?, using ion chromatography and suppressed ion conductivity. The method comprises loading a sample loop with a sample; injecting the sample from the sample loop into a column with an eluent, wherein the column comprises a guard column and an analytical column; separating, with the column, the injected sample at an effective separation temperature the injected sample in the presence of an organic modifier into a multiplicity of detectable ionic analytes; suppressing, with a suppressor, background signal; and detecting, with a detector, the multiplicity of ionic analytes.

Abstract: An automatic sampling device includes a sampling unit, a traveling unit and a power supply unit. The sampling unit includes a push module, which includes a push mechanism and a turning mechanism. A plurality of collection modules are sequentially disposed and can be constrained between the turning mechanism and the push mechanism. The push mechanism is at least configured to push the plurality of collection modules to abut against the turning mechanism. The turning mechanism is at least configured to turn over a designated collection module to a material receiving position, and to enable the receiving port of the designated collection module facing towards a sample outlet of the sampling module.