CN113776627A - Liquid level measuring device with temperature compensation - Google Patents
Liquid level measuring device with temperature compensation Download PDFInfo
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- CN113776627A CN113776627A CN202110932166.7A CN202110932166A CN113776627A CN 113776627 A CN113776627 A CN 113776627A CN 202110932166 A CN202110932166 A CN 202110932166A CN 113776627 A CN113776627 A CN 113776627A
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- liquid
- pipe
- temperature
- temperature compensation
- adjusting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
- G01F23/74—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means for sensing changes in level only at discrete points
Abstract
The invention discloses a liquid level measuring device with temperature compensation, which comprises a cylinder body, a liquid level sensor and a liquid level controller, wherein the cylinder body is used for displaying a liquid level state and playing a role in sealing protection; the connecting pipe comprises an air pipe and a liquid pipe, the air pipe is used for communicating air between the cylinder body and the device to be detected, and the liquid pipe is used for communicating liquid between the cylinder body and the device to be detected; the first temperature sensor is used for acquiring liquid temperature information in the cylinder and is connected with the temperature compensation device; the second temperature sensor is used for acquiring liquid temperature information in the liquid pipe and is connected with the temperature compensation device; the temperature compensation device is arranged on the liquid pipe and is used for adjusting the temperature of the liquid in the liquid pipe; the liquid level detection device realizes the thermal regulation and the cold regulation of the liquid in the liquid pipe through the temperature compensation device, so that the temperature of the liquid in the liquid pipe is kept consistent with that of the liquid in the cylinder after the liquid enters the cylinder, the liquid level detection accuracy is improved, and meanwhile, the service life of the device can be prolonged by keeping constant temperature.
Description
Technical Field
The invention relates to the technical field of metering equipment, in particular to a liquid level measuring device with temperature compensation.
Background
The height of the liquid medium in the container is called the liquid level, and the instrument for measuring the liquid level is called a liquid level meter. The level gauge is the level meter's one kind, the type of level gauge has tuning fork vibrating, magnetism suspension, the pressure type, the ultrasonic wave, the sonar wave, magnetism turns over board, radar etc., wherein magnetism floater level gauge has simple structure, high durability and convenient use, stable performance, long service life, be convenient for install advantages such as maintenance, but the temperature state of being surveyed liquid influences the degree of accuracy of liquid level detection easily, under the big condition of high low temperature difference in temperature change, it is great to lead to level measurement's error, is difficult to realize the level measurement of high accuracy.
For example, chinese patent CN201910109781.0 discloses a method for operating a built-in level measuring device using a differential pressure sensing device. Although the filtering membrane device which can only pass through gas molecules and prevent liquid molecules from entering is arranged at the air inlet of the ventilation balance pipe, the ventilation balance pipe is better protected from directly entering liquid, or liquid is gathered in the ventilation balance pipe due to evaporation and cooling of the liquid, so that the ventilation balance pipe cannot enter the liquid to guarantee the measurement accuracy; however, the influence of the temperature difference on the accuracy of the liquid level measurement still exists, and the accuracy of the liquid level measurement cannot be effectively guaranteed.
Disclosure of Invention
The invention mainly solves the problem of inaccurate liquid level measurement caused by temperature difference in the prior art; the liquid level measuring device with the temperature compensation function is provided, the influence of the temperature change of liquid in a measured device on the temperature of the liquid in the cylinder is reduced, the temperature of the liquid in the cylinder is kept in a certain range, and the accuracy of liquid level measurement is improved.
The technical problem of the invention is mainly solved by the following technical scheme: a liquid level measuring device with temperature compensation comprises a cylinder body, a liquid level sensor and a temperature sensor, wherein the cylinder body is used for displaying a liquid level state and playing a role in sealing protection; the connecting pipe comprises an air pipe and a liquid pipe, the air pipe is used for communicating air between the cylinder body and the device to be detected, and the liquid pipe is used for communicating liquid between the cylinder body and the device to be detected; the first temperature sensor is used for acquiring liquid temperature information in the cylinder and is connected with the temperature compensation device; the second temperature sensor is used for acquiring liquid temperature information in the liquid pipe and is connected with the temperature compensation device; and the temperature compensation device is arranged on the liquid pipe and is used for adjusting the temperature of the liquid in the liquid pipe. Compared with the problem that the liquid can only be heated in the prior art, the temperature compensation device can not only heat the flowing liquid, but also cool the liquid, so that the temperature of the liquid entering the cylinder is consistent with that of the liquid originally positioned in the cylinder, the problem that the magnetic steel inside the magnetic floater loses part of magnetism due to overlarge temperature difference change is effectively prevented, the accuracy of liquid level detection is improved, and meanwhile, the service life of the device can be prolonged by keeping constant temperature.
Preferably, the barrel comprises a shell, a turning plate indicator, a magnetic floater, a sealing cover, a flange plate and a blow-down valve, wherein the upper part of the shell is provided with an air hole, an air pipe is connected with the air hole, the lower part of the shell is provided with a liquid hole, a liquid pipe is connected with the liquid hole, the sealing cover is connected with the upper end of the shell, the flange plate is connected with the lower end of the shell, the blow-down valve is connected with the flange plate, the turning plate indicator is installed on the inner wall of the shell, the magnetic floater is arranged in the shell, and the magnetic floater is matched with the turning plate indicator to display the liquid level state. The liquid level state is visually displayed through the turning plate indicator, sediment is discharged through the flange plate and the drain valve, and the space in the cylinder body keeps good sealing performance through the sealing cover.
Preferably, the turning plate indicator comprises a red and white marking ball and a scale, the scale is fixedly arranged on the inner wall of the cylinder body, the red and white marking ball is magnetic and overturns along with the up-and-down floating of the magnetic floater, and the red and white marking ball is uniformly arranged on one side of the scale. The state display of the liquid level is more obvious through the red and white indication ball and the scale.
Preferably, the alarm device further comprises an alarm device, the alarm device comprises an upper limit alarm and a lower limit alarm, the upper limit alarm is mounted on the upper portion of the shell, and the lower limit alarm is mounted on the lower portion of the shell. And an upper limit alarm and a lower limit alarm are arranged, so that the liquid level can effectively alarm when the liquid level is too high or too low.
Preferably, the temperature compensation device comprises a controller, an adjusting cylinder, an adjusting pipe, a first stop valve, a second stop valve and a partition plate, the adjusting cylinder is in conduction connection with the liquid pipe through the first stop valve, one end of the adjusting pipe is in conduction connection with the upper portion of the adjusting cylinder, the other end of the adjusting pipe is in conduction connection with the liquid pipe through the second stop valve, control ends of the first stop valve and the second stop valve are connected with the controller, the partition plate is movably installed in the adjusting cylinder and partitions the adjusting cylinder to form a heat adjusting portion and a cold adjusting portion, and the controller controls the first stop valve and the second stop valve to work according to temperature information collected by the first temperature sensor and temperature information collected by the second temperature sensor. The controller controls the first stop valve and the second stop valve to be opened or closed according to the temperature information acquired by the first temperature sensor and the temperature information acquired by the second temperature sensor, so that hot liquid or cold liquid in the hot adjusting part or the cold adjusting part flows into the liquid pipe, and the liquid in the liquid pipe is comprehensively adjusted.
Preferably, a heating device is arranged in the heat regulating part, a refrigerating device is arranged in the cold regulating part, and both the heating device and the refrigerating device are connected with the controller. The liquid in the heat regulating part is heated through the heating device, the liquid in the cold regulating part is refrigerated through the refrigerating device, and the refrigerating device adopts a semiconductor refrigerating piece.
Preferably, the heating device comprises a first spring, an electronic limiting block, a first electronic switch, a second electronic switch and a battery, one end of the first spring is fixedly connected with the inner wall of the upper end of the adjusting cylinder, the other end of the first spring is fixedly connected with the partition plate, the first spring is connected with the battery through the first electronic switch, the electronic limiting block is arranged on the adjusting cylinder at the installation position of the partition plate, the electronic limiting block is connected with the battery through the second electronic switch, and the control ends of the first electronic switch and the second electronic switch are connected with the controller. Utilize spring circular telegram shrink and ohmic heating's characteristic, when the disconnection of second electronic switch, the electron stopper carries out the joint to the baffle, and first electronic switch is closed, and first spring circular telegram, first spring can't contract, can only heat, reaches the purpose that heats the liquid in the thermal control portion.
Preferably, the electronic limiting block comprises a base body, a second spring and a movable block, the base body is fixedly installed on the adjusting cylinder, the movable block is movably installed in the base body and connected with the partition plate in a clamped mode, one end of the second spring is fixedly connected with the movable block, the other end of the spring is fixedly connected with the base body, and the second spring is connected with the battery through a second electronic switch. When the second electronic switch is closed, the electronic limiting block is not clamping the partition plate, at the moment, the first electronic switch is closed, the first spring is electrified, the first spring contracts, the second stop valve is opened, liquid in the heat regulation part is conveyed into the liquid pipe through the regulating pipe, the heat regulation of the liquid in the liquid pipe is realized, when the second electronic switch is closed, the electronic limiting block is not clamping the partition plate, at the moment, the first electronic switch is disconnected, the first spring is also powered off, the refrigerating device is electrified to work, the liquid in the cold regulation part is refrigerated, the first stop valve is opened, the partition plate is pressed down through self gravity, the cold liquid in the cold regulation part is conveyed into the liquid pipe, and the cold regulation of the liquid in the liquid pipe is realized.
The invention has the beneficial effects that: the temperature compensation device, the first temperature sensor and the second temperature sensor are added on the basis of the original liquid level meter, the heat regulation and the cold regulation of liquid in the liquid pipe are realized through the temperature compensation device, so that the temperature of the liquid in the liquid pipe is kept consistent with that of the liquid in the cylinder after the liquid enters the cylinder, the problem that the magnetic steel inside the magnetic floater loses part of magnetism due to overlarge temperature difference is effectively prevented, the accuracy of liquid level detection is improved, and meanwhile, the service life of the device can be prolonged by keeping constant temperature.
Drawings
FIG. 1 is a schematic structural view of a liquid level measuring device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a temperature compensation device according to an embodiment of the present invention.
In the figure, 1, a shell, 2, a first temperature sensor, 3, a second temperature sensor, 4, a temperature compensation device, 5, a liquid pipe, 6, an air pipe, 7, a magnetic floater, 8, a turning plate indicator, 9, a sealing cover, 10, a flange plate, 11, a blow-off valve, 12, an adjusting cylinder, 13, a partition plate, 14, a semiconductor refrigerating sheet, 15, a first spring, 16, an adjusting pipe, 17, a base body, 18, a movable block, 19 and a second spring.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): a liquid level measuring device with temperature compensation is disclosed, as shown in figure 1, comprising a cylinder body for displaying the liquid level state and playing a role in sealing protection; the connecting pipe comprises an air pipe 6 and a liquid pipe 5, the air pipe is used for communicating air between the cylinder body and the device to be detected, and the liquid pipe is used for communicating liquid between the cylinder body and the device to be detected; the first temperature sensor 2 is used for acquiring liquid temperature information in the cylinder and is connected with the temperature compensation device; the second temperature sensor 3 is used for acquiring the liquid temperature information in the liquid pipe and is connected with the temperature compensation device; the temperature compensation device 4 is arranged on the liquid pipe and is used for adjusting the temperature of the liquid in the liquid pipe; and the alarm device (not shown in the figure) comprises an upper limit alarm and a lower limit alarm, the upper limit alarm is arranged on the upper part of the shell, and the lower limit alarm is arranged on the lower part of the shell.
The barrel includes shell 1, turn over board indicator 8, magnetism float 7, sealed lid 9, ring flange 10 and blowoff valve 11, the gas pocket has been seted up on the upper portion of shell, the trachea is connected with the gas pocket, the liquid hole has been seted up to the lower part of shell, liquid pipe and liquid jogged joint, sealed lid is connected with the upper end of shell, the ring flange is connected with the lower extreme of shell, the blowoff valve is connected with the ring flange, turn over the board indicator and install on the inner wall of shell, magnetism float sets up in the shell, magnetism float and the cooperation of turning over the board indicator carry out the demonstration of liquid level state.
The turning plate indicator comprises a red and white marking ball and a scale, the scale is fixedly installed on the inner wall of the cylinder body, the red and white marking ball is magnetic and overturns along with the up-and-down floating of the magnetic floater, and the red and white marking ball is evenly installed on one side of the scale.
As shown in fig. 2, the temperature compensation device includes a controller, an adjusting cylinder 12, an adjusting pipe 16, a first stop valve, a second stop valve and a partition plate 13, the adjusting cylinder is in conduction connection with the liquid pipe through the first stop valve, one end of the adjusting pipe is in conduction connection with the upper portion of the adjusting cylinder, the other end of the adjusting cylinder is in conduction connection with the liquid pipe through the second stop valve, control ends of the first stop valve and the second stop valve are connected with the controller, the partition plate is movably installed in the adjusting cylinder and partitions the adjusting cylinder into a heat adjusting portion and a cold adjusting portion, the controller controls the first stop valve and the second stop valve to work according to temperature information collected by the first temperature sensor and temperature information collected by the second temperature sensor, a heating device is arranged in the heat adjusting portion, a refrigerating device is arranged in the cold adjusting portion, and both the heating device and the refrigerating device are connected with the controller.
Heating device includes first spring 15, the electron stopper, first electronic switch, second electronic switch and battery, the one end of first spring and the upper end inner wall fixed connection who adjusts a section of thick bamboo, the other end and the baffle fixed connection of first spring, first spring is connected with the battery through first electronic switch, the electron stopper sets up on the regulation section of thick bamboo of baffle installation department, the electron stopper passes through the second electronic switch and is connected with the battery, first electronic switch and second electronic switch's control end all is connected with the controller.
The electronic limiting block comprises a base body 17, a second spring 18 and a movable block 19, the base body is fixedly installed on the adjusting cylinder, the movable block is movably installed in the base body and clamped with the partition plate, one end of the second spring is fixedly connected with the movable block, the other end of the spring is fixedly connected with the base body, and the second spring is connected with a battery through a second electronic switch.
The refrigerating device adopts a semiconductor refrigerating sheet 14.
The specific working principle of the invention is as follows: the liquid pipe and the air pipe are connected and installed with the device to be measured, in order to strengthen the working process of the liquid measuring device, a stop valve and a flange plate are arranged in the air pipe and the liquid pipe, according to the principle of a communicating vessel, along with the liquid level change in the device to be measured, the liquid in the device to be measured flows into the barrel body through the liquid pipe, a first temperature sensor collects the liquid temperature information in the barrel body in real time, a second temperature sensor collects the liquid temperature information in the liquid pipe in real time, when the liquid in the device to be measured enters the liquid pipe, the controller controls the first stop valve and the second stop valve to work according to the temperature information collected by the first temperature sensor and the temperature information collected by the second temperature sensor, when the liquid temperature in the liquid pipe is higher than the liquid temperature in the barrel body, the liquid in the liquid pipe needs to be cooled, a second electronic switch is closed, a second spring contracts to drive the movable block to move towards the interior of the base body, the electronic limiting block does not limit and clamp the partition plate, the first electronic switch is switched off, the first spring is switched off, the semiconductor refrigerating sheet is controlled to be electrified to work, liquid in the cold adjusting part is refrigerated, the first stop valve is opened, the partition plate is pressed down through self gravity to convey the cold liquid in the cold adjusting part into the liquid pipe, cold adjustment of the liquid in the liquid pipe is achieved, when the temperature of the liquid in the liquid pipe is lower than that of the liquid in the barrel, heating treatment needs to be carried out on the liquid in the liquid pipe, the second electronic switch is switched off, the second spring is in an original state, at the moment, the movable block limits and clamps the partition plate, the first electronic switch is closed, the first spring is electrified, the partition plate is clamped, the first spring cannot contract and can only be heated, the purpose of heating the liquid in the heat adjusting part is achieved, and the second stop valve is opened, so that the hot liquid in the heat regulating part is conveyed into the liquid pipe to realize temperature rise regulation.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. A liquid level measuring device with temperature compensation, comprising:
the cylinder is used for displaying the liquid level state and playing a role in sealing protection;
the connecting pipe comprises an air pipe and a liquid pipe, the air pipe is used for communicating air between the cylinder body and the device to be detected, and the liquid pipe is used for communicating liquid between the cylinder body and the device to be detected;
the first temperature sensor is used for acquiring liquid temperature information in the cylinder and is connected with the temperature compensation device;
the second temperature sensor is used for acquiring liquid temperature information in the liquid pipe and is connected with the temperature compensation device;
and the temperature compensation device is arranged on the liquid pipe and is used for adjusting the temperature of the liquid in the liquid pipe.
2. Level measuring device with temperature compensation according to claim 1,
the barrel includes the shell, turns over board indicator, magnetism float, sealed lid, ring flange and blowoff valve, the gas pocket has been seted up on the upper portion of shell, the trachea is connected with the gas pocket, the liquid hole has been seted up to the lower part of shell, liquid pipe and liquid jogged joint, sealed lid is connected with the upper end of shell, the ring flange is connected with the lower extreme of shell, the blowoff valve is connected with the ring flange, turn over the board indicator and install on the inner wall of shell, magnetism float sets up in the shell, magnetism float and the cooperation of turning over the board indicator carry out the demonstration of liquid level state.
3. Level measuring device with temperature compensation according to claim 2,
the turning plate indicator comprises a red and white marking ball and a scale, the scale is fixedly installed on the inner wall of the cylinder body, the red and white marking ball is magnetic and overturns along with the up-and-down floating of the magnetic floater, and the red and white marking ball is evenly installed on one side of the scale.
4. A liquid level measuring device with temperature compensation according to claim 3,
still include alarm device, alarm device includes upper limit alarm and lower limit alarm, the upper portion at the shell is installed to the upper limit alarm, the lower part at the shell is installed to the lower limit alarm.
5. Level measuring device with temperature compensation according to claim 1 or 2 or 3 or 4,
the temperature compensation device comprises a controller, an adjusting cylinder, an adjusting pipe, a first stop valve, a second stop valve and a partition plate, wherein the adjusting cylinder is in conduction connection with a liquid pipe through the first stop valve, one end of the adjusting pipe is in conduction connection with the upper portion of the adjusting cylinder, the other end of the adjusting pipe is in conduction connection with the liquid pipe through the second stop valve, the control ends of the first stop valve and the second stop valve are connected with the controller, the partition plate is movably installed in the adjusting cylinder and partitions the adjusting cylinder into a heat adjusting portion and a cold adjusting portion, and the controller controls the first stop valve and the second stop valve to work according to temperature information collected by a first temperature sensor and temperature information collected by a second temperature sensor.
6. Liquid level measuring device with temperature compensation according to claim 5,
the heating device is arranged in the heat adjusting part, the refrigerating device is arranged in the cold adjusting part, and the heating device and the refrigerating device are both connected with the controller.
7. Liquid level measuring device with temperature compensation according to claim 6,
heating device includes first spring, electron stopper, first electronic switch, second electronic switch and battery, the one end of first spring and the upper end inner wall fixed connection who adjusts a section of thick bamboo, the other end and the baffle fixed connection of first spring, first spring is connected with the battery through first electronic switch, the electron stopper sets up on the regulation section of thick bamboo of baffle installation department, the electron stopper passes through the second electronic switch and is connected with the battery, first electronic switch and second electronic switch's control end all is connected with the controller.
8. Liquid level measuring device with temperature compensation according to claim 7,
the electronic limiting block comprises a base body, a second spring and a movable block, the base body is fixedly mounted on the adjusting cylinder, the movable block is movably mounted in the base body, the movable block is connected with the partition plate in a clamped mode, one end of the second spring is fixedly connected with the movable block, the other end of the spring is fixedly connected with the base body, and the second spring is connected with the battery through a second electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110932166.7A CN113776627B (en) | 2021-08-13 | 2021-08-13 | Liquid level measuring device with temperature compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110932166.7A CN113776627B (en) | 2021-08-13 | 2021-08-13 | Liquid level measuring device with temperature compensation |
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| CN113776627A true CN113776627A (en) | 2021-12-10 |
| CN113776627B CN113776627B (en) | 2023-10-20 |
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| GB887613A (en) * | 1959-03-23 | 1962-01-17 | Yarnall Waring Co | Temperature compensation for liquid level gauge |
| US3512412A (en) * | 1967-10-19 | 1970-05-19 | Blaw Knox Co | Liquid level indicating device |
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| CN202757660U (en) * | 2012-09-10 | 2013-02-27 | 铁岭铁光仪器仪表有限责任公司 | External heat tracing type double-color water gauge |
| CN205066882U (en) * | 2015-08-31 | 2016-03-02 | 常州兰喆仪器仪表有限公司 | Heat preservation type magnetism turns over post level gauge |
| CN205426285U (en) * | 2016-03-14 | 2016-08-03 | 四川惠科达仪表制造有限公司 | Novel superhigh pressure stabiliser liquid level measurement device |
| CN206740213U (en) * | 2017-04-20 | 2017-12-12 | 安徽皖控自动化仪表有限公司 | A kind of difunctional magnetic double level gauge of weatherable |
| CN207798215U (en) * | 2018-02-13 | 2018-08-31 | 娄上楼 | A kind of liquid level gauge measuring liquid level |
| CN209014100U (en) * | 2018-10-30 | 2019-06-21 | 金川集团股份有限公司 | A kind of cold-proof magnetic double level gauge |
| CN210268802U (en) * | 2019-07-12 | 2020-04-07 | 南安市振邦家庭农场有限公司 | Anti-crystallization anti-blocking liquid level meter |
| CN111397688A (en) * | 2020-04-02 | 2020-07-10 | 唐山市丰润区展望自动化设备有限公司 | Liquid level measuring device for double-chamber balance container |
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2021
- 2021-08-13 CN CN202110932166.7A patent/CN113776627B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB887613A (en) * | 1959-03-23 | 1962-01-17 | Yarnall Waring Co | Temperature compensation for liquid level gauge |
| US3512412A (en) * | 1967-10-19 | 1970-05-19 | Blaw Knox Co | Liquid level indicating device |
| CN2876725Y (en) * | 2006-03-29 | 2007-03-07 | 宝山钢铁股份有限公司 | Level testing system for liquid container of sapce division apparatus |
| CN202442757U (en) * | 2012-03-06 | 2012-09-19 | 长春锅炉仪表程控设备股份有限公司 | Self-compensating magnetic liquid-level meter in full temperature area |
| CN202757660U (en) * | 2012-09-10 | 2013-02-27 | 铁岭铁光仪器仪表有限责任公司 | External heat tracing type double-color water gauge |
| CN205066882U (en) * | 2015-08-31 | 2016-03-02 | 常州兰喆仪器仪表有限公司 | Heat preservation type magnetism turns over post level gauge |
| CN205426285U (en) * | 2016-03-14 | 2016-08-03 | 四川惠科达仪表制造有限公司 | Novel superhigh pressure stabiliser liquid level measurement device |
| CN206740213U (en) * | 2017-04-20 | 2017-12-12 | 安徽皖控自动化仪表有限公司 | A kind of difunctional magnetic double level gauge of weatherable |
| CN207798215U (en) * | 2018-02-13 | 2018-08-31 | 娄上楼 | A kind of liquid level gauge measuring liquid level |
| CN209014100U (en) * | 2018-10-30 | 2019-06-21 | 金川集团股份有限公司 | A kind of cold-proof magnetic double level gauge |
| CN210268802U (en) * | 2019-07-12 | 2020-04-07 | 南安市振邦家庭农场有限公司 | Anti-crystallization anti-blocking liquid level meter |
| CN111397688A (en) * | 2020-04-02 | 2020-07-10 | 唐山市丰润区展望自动化设备有限公司 | Liquid level measuring device for double-chamber balance container |
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| CN113776627B (en) | 2023-10-20 |
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