486 results about "Sample chamber" patented technology

The invention discloses a honey adulteration detection method, which belongs to the technical field of food detection, and comprises the following steps: collecting an absorbance spectrum of a honey sample by using a near infrared spectrometer; extracting characteristic absorbance values A < lambda > 1 and A < lambda > 2 at a 1450 nm water molecule absorption peak and a 1490 nm saccharide molecule absorption peak; the ratio R is equal to A lambda 1 / A lambda 2; and comparing the R with a threshold range of 0.85-1.15 of pure honey so as to judge whether the honey is true or false. The portable device comprises a sample bin, a near infrared spectrum module, a control unit and a human-computer interaction interface, wherein a rotatable sample table is arranged in the sample bin to accommodate a plurality of disposable sample cups. The method abandons a complex black box model, adopts a characteristic wavelength ratio method with clear physical significance, has the outstanding advantages of simple principle, rapid detection (less than 30 seconds), high accuracy, low cost, simplicity and convenience in operation and the like, perfectly solves the problems of expensive equipment, long time consumption, limited identification capability and dependence on professionals in the prior art, and has a wide application prospect. The method is especially suitable for market on-site rapid screening.

The invention provides a dynamic heat-water-force coupling test device and test method, and relates to the technical field of rock performance test.The device comprises a sample chamber for containing a rock sample; the heat loading assembly, the pore water pressure loading assembly and the force loading assembly are integrally arranged; the heat loading assembly comprises a heating element and a cooling element so as to simulate an environment in a wide temperature range or under a freezing and thawing cycle condition; the pore water pressure loading assembly is communicated with the rock sample to establish pore water seepage loading; an axial pressure loading element of the force loading assembly applies dynamic axial pressure to the rock sample, and a confining pressure loading element of the force loading assembly applies dynamic confining pressure to the rock sample; the sealing sleeve wraps the rock sample so as to isolate the confining pressure medium from the liquid medium. According to the device provided by the invention, three dynamic loads including the dynamic temperature, the dynamic pore water pressure and the dynamic mechanical stress can be synchronously applied and accurately controlled in a single device, so that a rock sample is subjected to a mechanical test in a vivid dynamic multi-field coupling environment.

A testing device for measuring oil, gas and water contents in rock has a heating desorption unit that has a sample chamber for placing a rock sample to be detected, a crushing mechanism arranged within the sample chamber, and a heating mechanism. The heating desorption unit crushes and heats the rock sample in a sealed manner to achieve gas analysis and desorption analysis of oil and water contained therein, thus obtaining components to be detected. The device further has a cold trap collection unit in communication with the sample chamber, a light hydrocarbon capture unit in communication with the cold trap collection unit, a gas measuring unit in communication with the light hydrocarbon capture unit for measuring and calculating a gas volume; and a central control unit for controlling the testing device.

The invention discloses a spectral analysis device and method for gas Raman scattering of a hollow-core optical fiber, and belongs to the technical field of gas analysis sensing. The spectrum analysis device comprises a laser, a light beam coupling device, a hollow-core optical fiber gas sample chamber, a collecting device and a spectrograph which are sequentially arranged along a light path, the light beam coupling device is used for coupling excitation laser generated by the laser into the hollow-core optical fiber gas sample chamber; to-be-detected gas flows in the hollow-core optical fiber gas sample chamber, excitation laser is conducted, and a transmission light beam containing the excitation laser and Raman scattering light is output; the collecting device is used for separating excitation laser in the transmission light beam and outputting a light beam only containing Raman scattering; a small round hole is formed in an inlet of the spectrograph, spatial filtering is carried out, and the luminous flux lost when a light beam enters the spectrograph is reduced; and the spectrometer receives the Raman scattering to obtain the Raman spectrum of the gas to be detected. The luminous flux lost when the light enters the spectrograph is reduced, the light beam collection efficiency is improved, and the signal-to-noise ratio and the analysis sensitivity are improved.

Apparatus and methods are described including preparing a blood sample for analysis by depositing the blood sample within a sample chamber (52), and placing the sample chamber, with the blood sample deposited therein, within a microscopy unit (24). One or more microscopic images of the sample chamber (52) with the blood sample deposited therein are acquired, using a microscope of the microscopy unit. Based upon the one or more images, an amount of one or more cell types within the sample chamber that had already settled within the sample chamber, prior to acquisition of the one or more microscopic images is determined. A characteristic of the sample is determined, at least partially in response thereto. Other applications are also described.

A lysis capsule for performing a cell lysis procedure includes a hollow body having an open first end and an open second end, a first porous membrane covering the open first end, and a second porous membrane covering the open second end, and the hollow body defines a lysis chamber between the first and second porous membranes. A plurality of non-magnetic beads and at least one magnetic element are disposed within the lysis chamber, and the pores of the first and second porous membranes are sized to retain the non-magnetic beads and the magnetic element within the lysis chamber. An internal control may be contained within the lysis chamber to validate an assay result and / or to validate the effectiveness of the cell lysis procedure. The lysis capsule may be disposed within a sample chamber of a fluidic cartridge.

The invention provides a nuclear magnetic resonance system and method for simulating high-temperature and high-pressure conditions. The nuclear magnetic resonance system for simulating the high-temperature and high-pressure conditions comprises a core rotor module, a temperature control and heat dissipation module, a signal enhancement and detection module and a high-pressure environment module, and the core rotor module is used for solving the problems that a traditional rotor is low in precision, short in service life and poor in adaptability. According to the nuclear magnetic resonance system and method for simulating the high-temperature and high-pressure conditions, the tolerance pressure of a sample cavity is improved, extreme high-pressure scenes such as deep sea and a mantle can be simulated, the sealing life is prolonged, the sample pollution rate is reduced, the detection accuracy is improved, the pressure monitoring delay is shortened, the pressure fluctuation is reduced, and the environmental stability is improved; the deviation of different batches of detection results is reduced to be within 2%, the system has an overpressure automatic pressure relief function, the safety of the system is improved, the system is adaptive to different types of highly corrosive samples, and the detection types are expanded.

Provided herein is an electron particle system comprising an electron source system comprising a high voltage component housed within a high voltage component volume occupied by an insulation gas, a sample chamber, and an electron beam column. Also provided herein is a charged particle system comprising a charged source system comprising a high voltage component housed within a high voltage component volume occupied by an insulation gas, a sample chamber, and an electron beam column. Further provided herein is a method of using an insulation gas in a high voltage component of an electron particle system.

According to the high-gain back scattering detector and the observation system provided by the invention, the detector can be adaptively integrated with the immersed objective lens, and the combination scheme can realize the remarkable advantage of no loss of the working distance. According to the detector provided by the invention, the light path conduction structure is optimized, and the detector is cooperatively matched with the immersed objective lens, so that the advantage of high-resolution imaging of the immersed objective lens is reserved, the efficient capturing capability of the detector on backscattered electrons is maintained, and sufficient working distance can still be ensured in a high-precision observation scene. The flexible optical fiber is adopted to complete optical signal transmission in the sample bin, the length and the overall size of the light guide pipe can be effectively reduced, and the situation that a large-size light guide pipe of a conventional scintillator type back scattering electron detector occupies too much space in the sample bin is avoided. In addition, the detector realizes four-channel independent imaging of the scintillator type back scattering electron detector through a customized four-channel light guide pipe by connecting an independent optical fiber and a PMT.

This invention belongs to the field of starch content measurement technology and discloses a device for measuring the starch content of vegetables. It includes a near-infrared LED light source array, a miniature spectral sensor, an ARM processor, and a touch screen. It also includes a pistol-shaped housing. The near-infrared LED light source array, miniature spectral sensor, ARM processor, and touch screen are located at the front end of the pistol-shaped housing. A battery compartment is located at the rear end of the pistol-shaped housing, housing a removable rechargeable lithium battery for providing power. A disassembly compartment is located at the bottom of the pistol-shaped housing, within which a sample chamber is detachably mounted via a magnetic structure. The sample chamber contains a diffuse reflective ceramic plate for detecting tuberous vegetables. A communication module, located within the pistol-shaped housing, is also included for transmitting measurement data and synchronizing it to a mobile terminal. The communication module supports LoRa and Bluetooth dual-mode transmission. This invention uses near-infrared light of a specific wavelength to penetrate the vegetable epidermis, eliminating the need for slicing / grinding, thus achieving non-destructive testing.

The invention relates to a device and method for evaluating the oil saturation of rock based on a step-by-step centrifugal volumetric method, and the device comprises a centrifugal unit which comprises a rotating support and a centrifugal tray sleeving the rotating support; the measuring unit comprises a plurality of closed detachable centrifugal tubes, the plurality of centrifugal tubes are uniformly arranged in the circumferential direction of the centrifugal tray, a pressurizing chamber, a sample chamber and a collecting chamber are sequentially arranged in each centrifugal tube from top to bottom, and the pressurizing chamber and the sample chamber are separated through a sealing partition plate and are controlled to be opened and closed through a valve; and the sample chamber and the collection chamber are separated by a filter screen. Compared with an organic solvent, the supercritical CO2 adopted by the method has obvious advantages in the quantification of the crude oil of the source rock. The oil content measuring agent has both gas diffusivity and liquid solubility, is small in molecular size, can penetrate through tiny pores of source rocks, is higher in dissolving capacity for heavy components in crude oil, and can fully extract the crude oil in various pores and reduce residues, so that the oil content of the rocks is more accurately quantified.

A core needle biopsy device, including: a needle assembly, the needle assembly including a piercer and a hollow cutter, the piercer including a sharp distal tip and a notch proximal to the distal tip, the piercer being slidably disposed within the cutter to sever a tissue sample into the notch of the piercer; a drive assembly configured to selectively move the piercer and the cutter; and a tissue sample holder including a sample chamber, a fluid source, and a nozzle, the fluid source being configured to eject a liquid or gas from the nozzle and against a portion of the biopsy device to manipulate a severed tissue sample into the sample chamber.

The utility model discloses a kind of high-purity germanium detector vacuum life measuring device, including vacuum generation module and detection component, detection component is by first detection module and second detection module intercommunication composition, vacuum generation module and detection component intercommunication;First detection module includes first vacuum angle valve, vacuum leak and release gas test chamber and first vacuum gauge;Second detection module includes second vacuum angle valve, getter test chamber, getter sample chamber, second vacuum gauge, fine adjustment valve and high-purity test gas tank;The high-purity germanium detector vacuum life measuring device of this is vacuumized to detection component by vacuum generation module, subsequently detects the leak and release gas amount of high-purity germanium detector by first detection module, and then detects the getter gas suction capacity by second detection module, i. e. The vacuum life of high-purity germanium detector can be detected and calculated;The device can effectively detect the vacuum performance of high-purity germanium detector, provide support for the maintenance of high-purity germanium detector, ensure its detection accuracy.

This invention relates to a portable on-site detection device and method for Lu-177 radionuclide activity. The detection device includes a gamma detection assembly and a circuit board installed within a housing. The gamma detection assembly comprises several pieces, each housing a gamma detection module. The space formed by the gamma detection assemblies serves as a sample chamber, with a central slot for holding a Lu-177 carrier bottle. The gamma detection module employs a combination structure of a GAGG:Ce scintillator and a silicon photomultiplier tube (SiPM). The circuit board houses a connection module between the circuit board and the gamma detection assembly, a power conversion module, a signal summing circuit for the gamma detection assembly, a digital multichannel module, and a data analysis and transmission module. The testing method includes five steps, including device initialization. The beneficial effects are that it provides technical support for accurate pre-administration dose verification of Lu-177, ensuring medication safety for patients undergoing radionuclide therapy and improving the quality of clinical nuclear medicine treatment.

The utility model relates to the technical field of similar simulation experiment equipment, and discloses an experiment device for simulating mine earthquakes induced by movement of a water-containing weakly cemented rock stratum, which comprises a frame body, two movable plate bodies vertically arranged on the frame body and a pressing plate horizontally arranged on the frame body, the two movable plate bodies are in sliding fit with the frame body in the horizontal direction, and the pressing plate is arranged on the frame body. The two movable plate bodies, the pressing plate and a bottom plate of the frame body form a sample chamber for accommodating a rock sample, and the two groups of transverse pressure applying mechanisms are symmetrically arranged on the outer sides of the two movable plate bodies; each group of transverse pressure applying mechanism comprises a horizontal displacement assembly and a pressure applying end part connected to the horizontal displacement assembly, and the horizontal displacement assembly drives the pressure applying end part to move in the direction close to the movable plate body so as to apply pressure in the horizontal direction to the movable plate body. The dynamic pressure change condition of the weakly cemented rock stratum can be truly simulated, and the method has important significance for exploring the law and solving problems.

The invention relates to the field of wafer detection, in particular to a wafer detection device and method, the device comprises a scanning electron microscope, an atomic force microscope and piezoelectric ceramics, the scanning electron microscope comprises a lens cone, an objective lens and a sample chamber, the objective lens is arranged in the sample chamber, and a sample table for bearing a wafer to be detected is arranged in the sample chamber; the objective lens is used for acquiring a two-dimensional morphology image of the surface of the wafer to be detected; the atomic force microscope is arranged in the sample chamber, the atomic force microscope is not in contact with the sample table, the atomic force microscope comprises a cantilever and a probe installed at the end of the cantilever, the probe is used for obtaining the three-dimensional structure of a wafer to be detected, and the piezoelectric ceramic is arranged at the end, away from the probe, of the cantilever; and the piezoelectric ceramic pressure realizes fine adjustment of the probe in horizontal and height directions through directional deformation. Vibration of the sample table and transmission of heat to the atomic force microscope are effectively isolated, and measurement errors caused by mismatch of vibration noise and thermal expansion are reduced. Precise control of the position of the probe is realized through piezoelectric ceramics.

The present invention relates to the field of clinical radiotherapy technology, and in particular to a test system and method for the effect of an iodized oil area on photon radiotherapy dose. The system comprises: a plurality of iodized oil samples, each of which is made by mixing minced pig liver and iodized oil in different proportions; a cylindrical sample tube, each of which is composed of a plurality of detachably connected sample chambers, each of which is provided with the iodized oil samples in the sample chambers, each corresponding to the iodized oil sample. The linear accelerator irradiates an abdominal simulation phantom into which the sample tube is inserted. The CT scanner is connected to a radiotherapy planning system, which simulates the irradiation of the sample tube with a photon beam based on a CT image and obtains a simulated dose of electron density. The present application can characterize the effect of the iodized oil area on the photon radiotherapy dose by comparing the simulated dose of electron density obtained by the radiotherapy planning system with the actual dose of electron density obtained by an ionization chamber detector.

A fluid sample is dispensed into a sample chamber of a fluidic cartridge, the sample chamber containing non-magnetic beads, a magnetic element, and an internal control reagent contained within an internal control pellet including an internal control for validating an assay result and / or to validate the effectiveness of a cell lysis procedure. The magnetic element is exposed to a magnetic field, thereby causing movement of the magnetic element, which causes movement of the non-magnetic beads. Movement of the non-magnetic beads causes cells contained within the fluid sample to lyse and release nucleic acids. The internal control reagent dissolves in the presence of the fluid sample or movement of the non-magnetic beads disintegrates the internal control pellet, thereby releasing the internal control into the fluid sample. Movement of the magnetic element and the non-magnetic beads causes the internal control to be distributed within the fluid sample.

Provided are a vibration-suppressing mechanism that has excellent maintainability and can effectively control vibration of a column, and a charged particle beam device using the same. This charged particle beam device comprises: a sample chamber for accommodating a sample that will serve as an object to be observed therein; a column that is disposed on an upper portion of the sample chamber and irradiates and scans the sample with a charged particle beam generated by a charged particle source; and a vibration-suppressing mechanism that is removably provided to the column, said particle beam device being characterized in that the vibration-suppressing mechanism includes a stator affixed to the column, an annular mover that is supported so as to be movable in a direction orthogonal to the axial direction of the column, a plurality of actuators that cause the mover to vibrate in the direction orthogonal to the axial direction of the column, a plurality of vibration sensors affixed to the stator, and a controller that controls the actuators according to output signals from the vibration sensors.

A device comprising a sample chamber 400 for receiving a sample collector 200, an accommodating chamber and a testing chamber 100. The sample chamber 400 is provided with a sealing film (fig 17b; 404

The invention discloses a preparation method of an iron ore concentrate powder scanning electron microscope sample, and belongs to the field of material analysis and testing. The preparation method comprises the following steps: (1) adding iron ore concentrate powder to be detected into absolute ethyl alcohol, and fully and uniformly shaking to obtain a sample solution; (2) adding a dispersing agent into the sample solution, and uniformly oscillating by using an ultrasonic method to obtain a solution after ultrasonic oscillation; and (3) pouring the solution subjected to ultrasonic oscillation into a sprayer, uniformly spraying the solution to the surface of a conductive adhesive tape fixed on an objective table of a scanning electron microscope through the sprayer, and naturally drying to obtain the iron ore concentrate powder scanning electron microscope sample. The method is simple in sample preparation process, uniform in iron ore concentrate particle dispersion and easy to operate, the problem of iron ore concentrate powder agglomeration is solved, meanwhile, a scanning electron microscope sample chamber is not polluted, and the observation result is real and reliable.

The invention relates to the technical field of scanning electron microscopes, and discloses a molecular pump damping device for a high-resolution scanning electron microscope, the molecular pump damping device comprises a first damping assembly, the first damping assembly comprises a first connecting structure, a corrugated pipe, a second connecting structure and a plurality of supporting columns, the two ends of the corrugated pipe are respectively connected with the first connecting structure and the second connecting structure, and the first connecting structure is connected with the second connecting structure; the two ends of the supporting column are connected with the first connecting structure and the second connecting structure respectively, and at least part of the supporting column is an elastic section. The first damping assembly is arranged, the first damping assembly is combined with the corrugated pipe and is provided with the elastic section and the supporting column, the elastic section absorbs high-frequency vibration energy through elastic deformation of the elastic section, and the corrugated pipe compensates axial and radial displacement and isolates low-frequency vibration through a flexible structure of the corrugated pipe; vibration transmitted from a molecular pump to a sample chamber of the scanning electron microscope can be dissipated, so that zigzag artifacts of an image are effectively eliminated, and the scanning electron microscope has relatively high imaging resolution and definition under high magnification.

The invention relates to a scanning microscope (1) comprising a first assembly (I) with a sample stage (2) for holding a sample carrier (4) and a sample (5) placed thereon in a sample chamber. Furthermore, a second assembly (II) is provided, comprising illumination optics (7, 8) for guiding and shaping illumination radiation and for illuminating the sample (5); and detection optics (9) for collecting and guiding detection radiation emanating from the sample (5) along a detection beam path. The scanning microscope (1) is characterized by the fact that the second assembly (II) has a first section (12.1) of the detection beam path; a third assembly (III) is present which includes a second section (12.2) of the detection beam path; and at least one drive (6) is present to move the second assembly (II) relative to the third assembly (III) in a controlled manner. The invention further relates to a use of the scanning microscope (1).

This invention discloses a sludge moisture content detection device based on true density, comprising a sample chamber. The device is characterized by having a detection unit within the sample chamber, a compression unit on one side of the sample chamber, and the compression unit being installed within a support device. The detection unit includes a pressure sensor, a gravity sensor, and a limit sensor. The pressure sensor is installed on the side wall of the sample chamber, the gravity sensor is installed at the bottom of the sample chamber, and a sample tray is located above the gravity sensor. The limit sensor is located at the connection between the sample chamber and the compression unit. The compression unit includes a power drive base connected to a hydraulic rod, which is connected to a piston. The sludge moisture content detection device and method provided by this invention are simple, have a short measurement time, and utilize a non-contact method to eliminate the influence of porosity, ensuring the accuracy of sludge true density calculation and thus determining the detection accuracy of sludge moisture content.

The utility model relates to an ultraviolet and visible spectrophotometer, which aims at solving the technical problems that the current cuvette is relatively tight in insertion, relatively large in friction force and not smooth in insertion, and comprises a spectrophotometer shell, a sample chamber, a turning cover, a cuvette groove and a cuvette, the sample chamber is arranged in the spectrophotometer shell; the flip cover is rotationally arranged on the spectrophotometer shell corresponding to the opening of the sample chamber; the cuvette groove is arranged at the bottom in the sample chamber; the plurality of cuvettes are respectively connected with the cuvette groove through a plurality of connecting structures; the connecting structure comprises a U-shaped plate and an abutting elastic piece. The U-shaped plate is arranged in the cuvette groove; the two abutting elastic pieces are arranged on the two sides of the bottom of an inner cavity of the U-shaped plate correspondingly. The cuvette is inserted into the inner cavity of the U-shaped plate, and the two sides of the bottom of the cuvette are matched with the two abutting elastic pieces in an abutting mode respectively. The cuvette has the advantages that the cuvette is inserted into the U-shaped plate, the inner cavity of the U-shaped plate has enough space, the abutting elastic pieces abut against and position the cuvette, and the cuvette is convenient to insert and position.

The embodiment of the invention provides a carbon dioxide huff and puff experimental device and method under a tight oil reservoir, and relates to the technical field of oil and gas development. The experimental device comprises a sample chamber which is provided with an accommodating cavity; the injection structure is used for injecting water and oil into the containing cavity so that the rock core sample can be filled with the water and the oil, and the injection structure is used for injecting carbon dioxide into the containing cavity so that the carbon dioxide can enter the rock core sample and part of the water and the oil can be extracted; the pressure control system is used for applying pressure to the rock core sample; the heating device is used for heating the rock core sample; the pore detection device is used for detecting the pressure in the sample chamber; the resistance meter is used for detecting resistance parameters of water and oil in the rock core sample. Compared with the prior art, the amount of water and oil contained in the rock core sample can be detected and calculated through the pore detection device and the resistance meter, precision is high, errors are small, injection parameters of carbon dioxide can be conveniently adjusted according to the content of water and oil in the rock core sample, and the experiment efficiency is improved.

The invention discloses a filtration system and method for continuous permeation of multiple liquids, and belongs to the technical field of rock-soil body permeation testing, the filtration system comprises a filtration main body, a percolate supply system, a pressure supply system and a percolate storage system, the filtration main body comprises a rigid shell, and a sample chamber is arranged in the rigid shell; a percolate inlet channel and an air inlet channel are respectively arranged at the top end of the rigid shell, and a percolate outlet channel is arranged at the bottom of the rigid shell; a stainless steel filter screen, a rubber gasket, a permeable stone, percolation paper, a soil sample, percolation paper, a permeable stone and a rubber gasket are arranged in the sample chamber from bottom to top; the leachate supply system is communicated with the leachate inlet channel and is used for providing more than two types of leachate; the pressure supply system is communicated with the air inlet channel and provides percolation pressure for the sample chamber; the percolate storage system is communicated with the percolate drainage channel and provides storage of more than two kinds of percolate. According to the invention, rapid measurement of the permeability coefficient of the soil sample under continuous seepage conditions of different solutions can be realized.

The invention relates to a device and method for testing the freezing point of a mixed working medium, and the device comprises a first saturated vapor pressure working medium storage tank, a second saturated vapor pressure working medium storage tank, a third saturated vapor pressure working medium storage tank, a vacuum gas distribution bottle, a vacuum pump, and a sample chamber. An outlet of the first saturated vapor pressure working medium storage tank, an outlet of the second saturated vapor pressure working medium storage tank, an outlet of the third saturated vapor pressure working medium storage tank and an outlet of the vacuum gas distribution bottle are communicated and then are communicated with the vacuum pump through a first valve body; a sample groove is formed in the sample chamber, a working medium sample inlet is formed in the sample groove, and the outlet of the vacuum gas distribution bottle is further communicated with the working medium sample inlet through a ninth valve body; and the sample chamber is refrigerated by a refrigerator or liquid nitrogen.

The present application relates to a kind of high-strength steel low-angle grain boundary display and quantitative analysis method, the method comprises the following steps: step 1: sample preparation: the sample to be measured is inlaid, polished, polished, and then vibration polished, cut into 0.25-2mm thin section after being made into ordinary metallographic sample;Step 2: the sample prepared is placed in scanning electron microscope sample chamber, step 3: through EBSD acquisition crystal diffraction pattern;Step 4: utilize software to process data and show low-angle grain boundary;Step 5: utilize software to process data and quantitatively analyze low-angle grain boundary.This method displays a large number of low-angle grain boundaries in high-strength steel, and quantitatively analyzes the percentage content of different angle grain boundaries, which fills the gap in the existing microstructure observation method that cannot clearly display low-angle grain boundaries and conduct quantitative analysis, and provides important theoretical support for high-strength steel organization refinement strengthening mechanism research and on-site cooling process development.

This invention discloses a finger-driven microfluidic chip, belonging to the field of microfluidic chips. The volume of the first air bladder is different from that of the second air bladder. A check valve is disposed between the sample chamber and the second air bladder and / or the first air bladder. When one of the first air bladder and the second air bladder is pressed, the sample in the sample chamber flows between the sample chamber and the mixer, causing the sample to fuse with the pre-filled solid or liquid reagent in the first reagent chamber and enter the mixer for preliminary mixing. When the other of the first air bladder and the second air bladder is pressed, the sample in the sample chamber flows between the sample chamber and the second reagent chamber, causing the pre-mixed liquid to fuse with the pre-filled solid or liquid reagent in the second reagent chamber and be mixed in the mixer. Through the design of the first and second air bladders, the deformation volume can be precisely controlled individually each time, thereby controlling the flow of liquid. It adopts a finger-pressing method, eliminating the need for pump drive and simplifying operation. The check valve prevents liquid backflow.