73 results about "Oxygen meters" patented technology

The invention provides a method for optimizing the proportion of industrial waste residues and a microbial composite curing agent, and belongs to the technical field of building materials.The method comprises the steps that the industrial waste residues are ground into superfine powder with the specific surface area of 350-450 m < 2 > / kg, meanwhile, bacillus is cultured at the temperature of 30-35 DEG C until the concentration of bacillus is 108-109 / mL, and a mixture is obtained; a pH meter and a dissolved oxygen meter are adopted to monitor the state of a microbial solution in real time, the aeration intensity and nutrient solution supplement are automatically adjusted according to critical value judgment, a composite curing agent is prepared according to the calculation proportion, the interface bonding strength and compressive strength are tested, and the curing effect is evaluated through a strength development equation and a durability prediction equation. According to the comprehensive performance indexes, the matching parameters are dynamically adjusted, the testing and adjusting process is repeated until the results are stabilized in the target performance interval for five continuous times, the final matching is determined, and the technical problem that the matching of the industrial waste residues and the microbial composite curing agent is difficult to accurately optimize is solved.

The utility model relates to the technical field of medical instruments, and provides an integrated humidification bottle capable of hanging a nasal oxygen cannula. Comprising a humidification bottle, an oxygen meter and a nasal oxygen tube, the humidification bottle is connected with the oxygen meter, and the oxygen meter is connected with the nasal oxygen tube. An oxygen humidifying pipe is arranged in the humidifying bottle, and an annular hook is arranged outside the humidifying bottle; the oxygen meter is provided with a float-type flowmeter, an air pressure flow regulating valve, an oxygen input interface and an oxygen output interface; the nasal oxygen cannula is composed of an annular catheter and a linear catheter, and the annular catheter is provided with a nasal plug air outlet head, an ear support and a limiting ring. The ear supports are additionally arranged outside the nasal oxygen tube, pressure can be reduced, ear pressure sores are reduced, the nasal suction head is made of silica gel and is soft in texture, and the comfort level of a patient is increased; and the annular hook for fixing the nasal oxygen cannula is added, so that the nasal oxygen cannula after being opened can be kept clean, the health of a patient is guaranteed, the environment of a ward is kept clean, and the satisfaction of the patient is improved.

The application relates to a micro-dissolved oxygen meter secondary instrument calibration method, system and storage medium, and relates to the technical field of secondary instrument calibration. The calibration process of the micro-dissolved oxygen meter is imperfect, and the calibration of the secondary instrument of the micro-dissolved oxygen meter is insufficient, so that the calibration accuracy and reliability of the micro-dissolved oxygen meter are low. The method comprises the following steps: determining the target priority of a plurality of preset secondary instrument calibration modes according to the measurement indexes of the secondary instrument to be measured; the target priority represents the initial order of calling each preset secondary instrument calibration mode for calibration; according to the target priority, each preset secondary instrument calibration mode is called to calibrate each measurement index of the secondary instrument to be measured, and a calibration report is obtained; the plurality of measurement indexes include one or more of the following: a dissolved oxygen concentration measurement value, a temperature measurement value or a temperature-compensated dissolved oxygen concentration measurement value; one preset secondary instrument calibration mode corresponds to one measurement index.

The utility model discloses a portable replacement formula dissolved oxygen appearance probe structure, including equipment main part, the top of equipment main part is provided with connecting wire, and the one end fixedly connected with the mounting head of connecting wire relative equipment main part, the bottom of mounting head is provided with metal insert piece, and portable replacement formula dissolved oxygen appearance probe structure still includes the plug -in board, and the both sides of plug -in board are relatively arranged in the bottom of mounting head. In the above -mentioned scheme, the mounting head is inserted with the butt joint pipe, makes metal insert piece to be inserted into the insert piece groove, and the plug -in board of setting on the both sides of mounting head bottom enters the plug -in groove, the arc -shaped clamping block of plug -in board bottom setting contacts with the inner wall of plug -in groove and is extruded, and the spring of guiding column inside connection produces the deformation, and arc -shaped clamping block shrinks to the plug -in board simultaneously, makes the whole probe more simple and concise, and the top joint can integrate annular sealing ring, and when the buckle is closed, synchronous compression sealing washer no.

The invention relates to the field of industrial wastewater treatment, in particular to an aeration method of an aerobic tank in industrial wastewater treatment. The air filter is additionally arranged in front of an air inlet pipeline of the frequency conversion fan, impurities such as oil drops and dust in the air filter are removed, the filtering and purifying effects are achieved, the gas pipeline mixer is additionally arranged, the oxygen pipeline is additionally arranged on the gas pipeline mixer, and the purpose of achieving the oxygen content of the aeration system through valve adjustment is achieved; and a dissolved oxygen tester is arranged at an inlet and an outlet of the aerobic tank and is connected with a control system. The air filter is additionally arranged to remove flammable and explosive media, the oxygen content is monitored on line and automatically controlled, safety and reliability are achieved, stable operation of the system is guaranteed, the oxygen pipeline is additionally arranged on the newly-arranged gas pipeline mixer, air and oxygen are fully mixed, the oxygen utilization efficiency is improved, and the oxygen utilization rate is increased while the oxygen requirement of biochemical reaction is met. The energy consumption of the fan is reduced, and the operation cost is saved.

The utility model belongs to the technical field of oxygen metering and billing, and particularly discloses an intelligent oxygen meter which comprises an intelligent oxygen meter shell. An oxygen sensor and a control chamber are arranged in the intelligent oxygen meter shell, and an oxygen inlet and an oxygen outlet are formed in the two sides of the outer portion of the intelligent oxygen meter shell respectively. A sleeve and a control valve are arranged on the oxygen inlet; a sleeve is arranged on one side of the oxygen outlet; the upper end of the intelligent oxygen meter shell is connected with the control room; a communication module, a control module, a data processing module, a display screen module, a power supply module, a charging module and a single chip microcomputer module are arranged in the control room; the single-chip microcomputer module is connected with the communication module, the control module, the display screen module, the power supply module, the data processing module and the charging module. According to the utility model, the oxygen flow can be accurately measured, and the problems that the traditional oxygen metering equipment cannot realize remote data transmission and management and is not beneficial to centralized monitoring and resource optimization configuration are solved.

The invention provides an Allen test intelligent measuring device and a measuring method thereof.The Allen test intelligent measuring device comprises a finger clip type oximeter, a main control instrument on a vertical rod and two automatic pressing mechanisms arranged on the vertical rod, the distance between the automatic pressing mechanisms can be adjusted, and the automatic pressing mechanisms emit laser rays obliquely downwards through a laser device and are aligned with the radial artery and the ulnar artery of the wrist of a patient respectively; the piston column is driven by the motor to press downwards and apply pressure to the wrist of a patient, and the pressing pressure is sensed through the pressure sensor; and the finger clip type oximeter, the motor, the pressure sensor and the laser are respectively in communication connection with the main control instrument. The device has the advantages of being compact in structural design, accurate in measurement, convenient and fast to operate, time-saving and labor-saving, and capable of further analyzing measurement data and obtaining a more comprehensive test result.

The invention discloses a combustion carbon dioxide on-line monitoring system based on a CEMS. The combustion carbon dioxide on-line monitoring system comprises a parameter acquisition module, a mapping module, a calibration triggering module, a virtual value generation module, a data identification module and a verification module. The parameter acquisition module synchronously acquires a concentration measurement value and a concentration measurement value of a smoke oxygen meter at a smoke outlet through two independent communication channels to generate corresponding () data pairs; and the mapping module can select () data pairs in a specific time window and perform linear regression analysis on the () data pairs to determine the concentration measurement values and the mapping values of the concentration measurement values. According to the invention, continuous concentration data can be generated through the virtual value generation module during calibration, and the problem of data blank segments in the calibration process of an analyzer in a traditional CEMS is solved.

The application relates to a finger pulse oxygen optical signal simulation method, a test method and a system based on dynamic pressure feedback. The application introduces dynamic pressure feedback, adopts unequal attenuation constants to perform differential amplitude attenuation modulation on red light and infrared light channels, solves the problem that an output signal of an existing simulator is too idealized, and improves the accuracy of pulse blood oxygen meter test and calibration.

1. Name of the product in this design: Faucet Oxygen Generator. 2. Purpose of this design: This design is used for disinfection and sterilization when installed on a faucet. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention relates to a calibration method and system for a secondary instrument of a trace dissolved oxygen meter and a storage medium, relates to the technical field of secondary instrument calibration, and aims to solve the problems of low calibration accuracy and poor reliability of the trace dissolved oxygen meter caused by incomplete calibration process of the trace dissolved oxygen meter and lack of calibration of the secondary instrument of the trace dissolved oxygen meter. The method comprises the following steps: determining target priorities of a plurality of preset secondary instrument verification modes according to measurement indexes of a secondary instrument to be measured; the target priority represents a previous sequence of calling each preset secondary instrument verification mode for verification; according to the target priority, calling each preset secondary instrument verification mode, and verifying each measurement index of the to-be-tested secondary instrument to obtain a verification report; the plurality of measurement indexes are one or more of the following items: a dissolved oxygen concentration measurement value, a temperature measurement value or a dissolved oxygen concentration measurement value after temperature compensation; one preset secondary instrument calibration mode corresponds to one measurement index.

1. The name of the design product: blood oxygen meter. 2. The use of the design product: for monitoring the oxygen content in human blood. 3. The design points of the design product: the shape of design 1, the combination of shape and color of design 2. 4. The picture or photo that best indicates the design points: the perspective view of design 1. 5. Design 1 is designated as the basic design. 6. Other circumstances that need to be explained: design 2 of the design to be protected contains color.

The oxygen-enriched combustion system of the thermal oxidation type ceramic roller kiln is composed of an air compression unit, a membrane method oxygen making unit, a front cooling unit, a rear heating unit, a grading air distribution unit and an intelligent control system. The oxygen-enriched air is distributed to the roller kiln in the form of main combustion air and combustion-supporting air through graded air distribution and is brought into the roller kiln through waste heat of compressed air, meanwhile, the ratio of the oxygen-enriched air to fuel is automatically controlled by means of accurate regulation and control and real-time control of the intelligent control system on the electromagnetic valve and the oxygen meter, and the oxygen-enriched air is supplied to the roller kiln in the form of main combustion air and combustion-supporting air. According to the high-temperature oxygen-enriched kiln, sufficient combustion is achieved in the high-temperature oxygen-enriched environment, the heat efficiency in the kiln is improved, meanwhile, a constant and controllable high-temperature area is kept, the quality of products produced in the kiln is improved, nitric oxide generated in the combustion process is reduced, the emission reduction effect is greatly improved, meanwhile, the pollution discharge cost can be reduced, and practicability is high.

The invention relates to an oximeter adjusting method and device.The method comprises the steps that light intensity data corresponding to a target finger are obtained, a light intensity data set is formed, and the light intensity data are light intensity data which are detected by a light receiving component of an oximeter and penetrate through the target finger; calculating parameter information corresponding to the light intensity data set according to the state information corresponding to the light intensity data set; and adjusting the signal amplification factor of a light receiving component of the oximeter according to the parameter information. According to the oximeter adjusting method and device provided by the invention, the parameter information obtained according to the light intensity data is compared with the preset range, and when the parameter information does not fall into the preset range, the signal amplification factor of the light receiving component of the oximeter is at least adjusted; the influence of human body factors such as skin color and finger thickness and environmental factors on the accuracy of the measurement result of the oximeter is eliminated, and higher measurement accuracy and faster stable value obtaining of the oximeter are achieved.

The utility model discloses a portable pressurizing cabin control device which comprises a control box cover and a control box body covered with the control box cover, an industrial control touch screen and an industrial control all-in-one machine are arranged in the control box cover, and an oxygen inlet connector, an oxygen meter, an oxygen valve and an oxygen pressurizing connector are fixed in the control box body. An oxygen meter is arranged on a pipeline between the oxygen inlet connector and the oxygen valve, and an in-cabin gas sampling inlet connector, an in-cabin gas detector, a mask gas sampling inlet connector, a mask gas detector, an electrical connector, a gas source inlet connector, a gas source meter, a pressurization valve and a pressurization inlet connector are fixed in the control box body. A gas source meter is arranged on a pipeline between the gas source gas inlet connector and the pressurization valve, a pressure reduction gas outlet connector, a pressure reduction valve and a pressure reduction silencer are fixed in the control box body, and the electrical connector, the oxygen meter, the cabin gas detector, the mask gas detector, the gas source meter and the industrial control touch screen are electrically connected with the industrial control all-in-one machine. According to the utility model, the treatment efficiency and effect are improved.

The application discloses a high-pressure multi-element mixed gas preparation system, which comprises an upper computer, a lower computer, a first gas source control pipeline, a second gas source control pipeline, a binary mixer, a first oxygen meter, a binary buffer, a pressure boost control pipeline and a gas storage tank. According to the set mixed gas proportioning concentration of each gas, the corresponding matched gas target flow can be obtained to control the opening of the gas flow regulating valve on each gas source control pipeline, so that the gas in each gas source control pipeline can flow according to the corresponding matched gas target flow, and according to the continuous flow gas distribution mode, the various gas components in the mixed gas are continuously filled into the mixed gas cylinder in a certain proportion for mixing and gas distribution through the flow control of various gases, and the accurate and stable output of the mixed gas is realized. The mixed gas oxygen concentration control range is 0.4% to 40%, and the control precision is ±5% of the oxygen concentration target value.

The invention relates to the technical field of microbial culture equipment, and discloses an operating environment simulation device for nitrifying bacteria resuscitation, the operating environment simulation device for nitrifying bacteria resuscitation comprises a box body, the box body is provided with a simulation assembly, and the simulation assembly comprises a water outlet pipe. According to the operating environment simulation device for nitrifying bacteria recovery, in order to enable the device to adapt to the core requirement of efficient nitrifying bacteria recovery, the simulation assembly is arranged and matched with the water inlet pipe and the water outlet pipe to control water flow through a valve, sewage can be introduced or a carbon source and alkalinity can be supplemented, and the actual working condition of a sewage treatment system is met; a pH meter, a dissolved oxygen meter and a thermometer of the detection module monitor core parameters in real time through a detection rod, a heating device controls the temperature, an air inlet pipe uniformly supplies air to multiple groups of aeration pipes through a shunt pipe, the content of dissolved oxygen is rapidly adjusted, a bottom filter plate bears activated sludge, an inclined plate guides water flow to make full contact with the sludge, and the air inlet pipe is fixed through a limiting cylinder to ensure stable aeration.

The utility model discloses an oxygen meter for regularly detecting corrosion resistance of a kiln. The device comprises an exhaust pipe, a filter box connected to the exhaust pipe, an oxygen measuring sensor connected to one side of the filter box, a flow meter connected to one side of the oxygen measuring sensor, an acid and alkali resistant diaphragm pump connected to one side of the flow meter, and a discharge port connected to the acid and alkali resistant diaphragm pump, the filter box can filter water vapor and foreign matter in gas, one side of the exhaust pipe is further connected with a one-way valve, after the oxygen measuring sensor makes contact with the exhausted gas, the measured oxygen concentration is converted into-MA current signals which are transmitted to the control panel, and the oxygen concentration is calculated through simulation. The oxygen concentration value is displayed on the liquid crystal display; the equipment adopts the acid and alkali resistant diaphragm pump to mainly prevent water vapor with strong alkali and strong acid from entering the diaphragm pump due to product reasons to damage the diaphragm and further to damage the oxygen meter.

The utility model relates to the technical field of water body oxygen concentration detection, in particular to an automatic water body oxygen concentration detection device which comprises a box body and a dissolved oxygen meter, the dissolved oxygen meter is fixedly connected to the middle of the upper end of the outer wall of the box body through a support, and an automatic water body oxygen concentration detection structure is arranged on the right side of the outer wall of the box body. A position adjusting structure is arranged on the left side of the outer wall of the box body. According to the automatic water body oxygen concentration detection device, through the automatic water body oxygen concentration detection structure, the motor is started to drive the worm to rotate in the box body through the bearing, the worm rotates to drive the worm gear to rotate in the box body through the bearing, and the worm gear rotates to drive the spool to rotate in the box body through the bearing, so that a cable wound on the outer wall of the spool can be unfolded through the spool; the motor is used for finally driving the detection head to lift and move, the detection head is conveyed into a detection water area and withdrawn, manual operation steps of workers are reduced, automation is achieved, the operation process is more convenient, and practicability is effectively improved.

The invention discloses a nuclear power unit water supply oxygenation system inertia time measuring method and a related device. The method comprises the following steps that the theoretical oxygenation concentration M0 of a unit in the current state is calculated according to the oxygenation amount of an oxygenation device and the flow measured by a flow meter, and the downstream dissolved oxygen concentration actually measured by an online dissolved oxygen meter is N0; (2) starting from the moment T1, adjusting the opening degree of an oxygen adding control valve, increasing the theoretical oxygen adding concentration M1 to be twice of the initial set oxygen adding concentration M0, maintaining the valve position of the oxygen adding control valve to be stable, and recording the current moment T2; 3) after the dissolved oxygen recorded by the online dissolved oxygen meter rises and is stable, recording the time T3 when the dissolved oxygen starts to rise, the time T4 when the dissolved oxygen rises to N1, the time T5 when the dissolved oxygen rises to N2 and the time T6 when the dissolved oxygen is stabilized at a final stable value N3, and N1 = 120% * N0; n2 = 90% * N3; and 4) calculating the inertia time delta Ts of the water supply and oxygenation system. The method and the related device can be used for measuring the inertia time of the water supply and oxygenation system of the nuclear power unit, and the accuracy is high.

The utility model discloses a kind of breeding information monitoring devices, it is related to breeding detection technical field, including protective shell, protective shell bottom is fixedly installed with positioning ring seat, positioning ring seat is fixedly installed with connecting support leg on, connecting support leg is fixedly installed with telescopic prop on, detection mechanism is equipped in protective shell, detection mechanism includes the positioning support fixedly installed in protective shell, driving rack is movably installed on positioning support, driving rack one side is rotatably installed with driving gear, driving rack lower end is fixedly installed with positioning seat, dissolved oxygen meter probe is fixedly installed on positioning seat, flushing mechanism is connected on positioning support, driving gear is fixedly installed with movable shaft, movable shaft is equipped with planetary reducer. The breeding information monitoring device, detection mechanism can replace artificial automatically with dissolved oxygen meter probe into breeding pond and detect, flushing mechanism can flush clean sundries on dissolved oxygen meter probe.

The utility model discloses a device and a system for measuring an oxygen transfer coefficient, which comprise a reaction kettle, a dissolved oxygen meter arranged in the reaction kettle, a clean water tank, a sewage tank, a deoxidizer tank, a catalyst tank, a liquid level meter, a thermostat and a timer, the reaction kettle is respectively communicated with the clean water tank, the sewage tank, the deoxidizer tank and the catalyst tank, the liquid level meter and the thermostat are arranged in the reaction kettle, the liquid level meter and the thermostat are respectively positioned at the top end and the bottom end of the reaction kettle, and the timer is in signal connection with the thermostat. The volume and the temperature of liquid in the reaction kettle are accurately controlled through the liquid level meter and the thermostat respectively, and the oxygen transfer coefficient is measured and calculated by the dissolved oxygen meter mounted in the reaction kettle, so that the influence of volume and temperature fluctuation on the measurement of the oxygen transfer coefficient is reduced, experimental errors caused by liquid level and temperature changes are avoided, and the experimental accuracy is improved. And the dissolved oxygen content in the liquid in the reaction kettle can be accurately measured.

The invention discloses a mobile wastewater biochemical treatment device and a working method thereof. The mobile wastewater biochemical treatment device comprises a container as well as an adjusting buffer tank, a biochemical system tank, a biochemical sedimentation tank and a biochemical water outlet tank which are arranged in the container, the biochemical system pool comprises an anoxic pool, a first aerobic pool and a second aerobic pool; a stirrer is arranged in the anoxic tank, a dosing device is arranged in the first aerobic tank, a pH meter, a heating rod and a dissolved oxygen meter are arranged in the second aerobic tank, and a water outlet of the second aerobic tank is connected with a biochemical sedimentation tank; the biochemical sedimentation tank comprises a central cylinder and a flow baffle arranged around the central cylinder, and is used for separating wastewater and sludge when effluent of the biochemical system tank flows downwards through the central cylinder, and the separated water enters the biochemical effluent tank through an overflow weir at the top of the biochemical sedimentation tank, so that effective wastewater biochemical treatment is realized, the installation is convenient, the maintenance is simple, and the adaptability is strong.

1. The name of the design product: clip type blood oxygen meter. 2. The use of the design product: for detecting human blood oxygen. 3. The design points of the design product: the combination of shape, pattern and color. 4. The picture or photo that best shows the design points: perspective view. 5. The design claimed contains color.

The application discloses a vacuum isothermal forging process and device suitable for high-temperature titanium-based materials, relates to the technical field of isothermal forging, and comprises a heating furnace, a male die is connected with a pressure head through high-temperature bolts, and a female die is fixedly connected with a die base through high-temperature bolts; a discharging device is arranged on the lower wall of the heating furnace, so that blank feeding and formed forging taking-out are facilitated; a vacuum pump set and an oxygen meter device matched with the heating furnace can realize monitoring of a vacuum environment and oxygen content in the furnace in the isothermal forging process; the device can guarantee that the whole process from blank and die heating to subsequent forging processes is completely closed, can guarantee the precision and performance of a final formed piece, and has the effects of prolonging the service life of the die and the like. The device can realize almost all heat treatment processes involved in conventional heat treatment and can realize true vacuum isothermal forging.

Disclosed are: a packaging body configured so that even if an oxyalkylene group-containing PVA-based resin is stored for a long period of time in a state of the packaging body, the oxyalkylene group-containing PVA-based resin is unlikely to cause a problem of thickening during melt kneading; and a manufacturing method of the packaging body. The packaging body is obtained by housing the oxyalkylene group-containing PVA-based resin in a bag body, the bag body being configured so that the permeation amount of oxygen is 1 m 2 The oxygen permeation degree of the film of the oxygen meter is 1000 cc / m 2 ·day·atm or less. In the packaging body, oxidation of the oxyalkylene group-containing PVA-based resin is inhibited, and generation of a carboxyl group-containing compound, which is a main cause of thickening during melt kneading, is inhibited.

1. The name of the design product: clip type blood oxygen meter. 2. The use of the design product: the design product is used for medical and household blood oxygen concentration test. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

This invention provides an anaerobic ammonia oxidation device and its application. The device maintains an oxygen-deficient state by introducing nitrogen gas into the device to eliminate dissolved oxygen in the water. Furthermore, the nitrogen inlet is positioned at the top of the packing layer, effectively preventing excessive shedding of the anaerobic ammonia oxidation biofilm from the support layer and packing layer. In addition, this invention improves denitrification efficiency and maintains long-term stable operation of the anaerobic ammonia oxidation device through various methods, including installing a packing baffle at the outlet of the anaerobic reactor to reduce packing loss, installing dissolved oxygen meters in both the anaerobic reactor and the circulating water tank to improve the accuracy of dissolved oxygen monitoring, and implementing a temperature control system in the straight pipe section of the anaerobic reactor to regulate the reaction temperature. Applying this device to the denitrification treatment of nitrogen-containing wastewater demonstrates high denitrification efficiency and promising development prospects.

The invention discloses an oxygen meter convenient to operate, which comprises an oxygen meter body and a remote control handle, and telescopic pipe rods are fixedly arranged on the outer side of the oxygen meter body close to the two ends. Belongs to the technical field of oxygen meter structures, the arranged telescopic pipe rod enables the oxygen meter to be placed in pipelines with different thicknesses, the power frame wheel can drive the oxygen meter to move back and forth in the pipelines so that the oxygen meter can reach a specified oxygen measuring area in the pipelines, and the arranged oxygen meter body can be bent under the action of external force so that the oxygen meter can be placed in the pipelines. The oxygen measuring instrument can adapt to pipelines with different bending shapes through the oxygen measuring instrument body, air in an oxygen measuring area can more quickly enter the oxygen measuring instrument to be detected through the arranged air inlet funnel, the tested air is exhausted out of the pipeline along the exhaust pipe, the detection result is prevented from being influenced, and the detection efficiency is improved. The arranged remote control handle enables a display screen, a control key and an indicating lamp which are originally arranged on the surface of the surveying and mapping instrument to be combined on the handle, so that the surveying and mapping instrument is more convenient and flexible to control.

The utility model relates to the technical field of portable testers, and discloses a portable dissolved oxygen tester which comprises a base, a first groove is formed in the right side of the top of the base, a display screen is connected to the first groove in a sliding mode, a circular groove is formed in the left side of the top of the base, and a rotating plate is rotationally connected to the interior of the circular groove. A second groove is formed in the top of the rotating plate, the front side and the rear side of the top of the second groove are fixedly connected with the same transverse plate, a third groove is formed in the rear side of the bottom of the base, a probe is arranged in the third groove, and the top of the display screen communicates with a connecting line. And the other end of the connecting line penetrates through the circular groove and the third groove and is communicated with the right end of the probe. According to the dissolved oxygen tester, the transverse plate is rotated to drive the rotating plate to rotate, recycle and release the connecting wire, so that the connecting wire is neatly stored, the connecting wire is not easy to damage, and the service life of the dissolved oxygen tester is prolonged.