CN110006503A - A kind of novel water level sensor - Google Patents
A kind of novel water level sensor Download PDFInfo
- Publication number
- CN110006503A CN110006503A CN201910212746.1A CN201910212746A CN110006503A CN 110006503 A CN110006503 A CN 110006503A CN 201910212746 A CN201910212746 A CN 201910212746A CN 110006503 A CN110006503 A CN 110006503A
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- CN
- China
- Prior art keywords
- air bag
- level sensor
- water level
- mounting plate
- novel water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims description 53
- 239000007767 bonding agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims 1
- 238000012546 transfer Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- 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
- G01F23/14—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 measurement of pressure
- G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
- G01F23/164—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid using a diaphragm, bellow as transmitting element
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
It is disclosed by the invention to belong to water level sensor technical field, specially a kind of novel water level sensor, including mounting plate and switch block, ripple air bag is provided in the middle part of the lower surface of the mounting plate, the lower surface two sides of the mounting plate are bolted with expansion link mechanism, the left and right sides bottom end of the ripple air bag is provided with supporting block, bottom end of the supporting block of two sides respectively with the expansion link mechanism of two sides is spirally connected, the upper surface of the mounting plate is bolted with hollow pillar stand, the hollow pillar stand is connected to ripple air bag, the upper end of the hollow pillar stand is bolted with appendix, the other end of the appendix is socketed with promotion bellows, by ripple air bag and push being used cooperatively for bellows, the mode for carrying out pneumatic transfer power can be used for a long time and can be automatically reset, the phenomenon that reducing electronic component damage；By being used cooperatively for expansion link mechanism and supporting block, ripple air bag air inlet return can be assisted.
Description
Technical field
The present invention relates to water level sensor technical field, specially a kind of novel water level sensor.
Background technique
Sensor is a kind of detection device, can experience measured information, and the information that can will be experienced, by a set pattern
Rule is for conversion into electric signal or the information output of other required forms, to meet transmission, processing, storage, the display, record of information
With control etc. require.The characteristics of sensor includes: micromation, digitlization, intelligence, multifunction, systematization, networking.It
It is to realize the automatic primary link detected and automatically control.
Such as China Patent Publication No. is that CN207247597U discloses a kind of solar energy liquid level sensor, including liquid level passes
Sensor ontology and water pump, the liquid level sensor ontology is bolted on the side of side cover, and side cover is being stored up by setting
One end of water tank, the water pump is fixed on the other side of side cover, and the bottom of water pump is connected with water pipe.Currently, water in solar energy
Level sensor is easy after the sensor long-time use of original electronic type by water enchroachment (invasion) for being monitored to water on inside
It loses and internal circuit is caused to damage, influence normal use.It is solved for this reason, it may be necessary to design corresponding technical solution and give.
Summary of the invention
The purpose of the present invention is to provide a kind of novel water level sensors, mentioned above in the background art original to solve
Electronic type sensor long-time use after be easy to be caused the damage of internal circuit by water erosion, influence normal use
Problem.
To achieve the above object, the invention provides the following technical scheme: a kind of novel water level sensor, including mounting plate and
The lower surface middle part of switch block, the mounting plate is provided with ripple air bag, and the lower surface two sides of the mounting plate are bolted with
Expansion link mechanism, the left and right sides bottom end of the ripple air bag are provided with supporting block, and the supporting block of two sides is respectively with two
The bottom end of the expansion link mechanism of side is spirally connected, and the upper surface of the mounting plate is bolted with hollow pillar stand, the hollow pillar stand and ripple
Air bag connection, the upper end of the hollow pillar stand are bolted with appendix, and the other end of the appendix is socketed with promotion bellows, institute
It states and is bonded with push rod on the right side wall for pushing bellows, the right end of the push rod extends to the inner cavity of switch block；
The switch block includes switch housing and two groups of contact conductor plates being fixed on the upside of switch housing inner wall,
And two groups of contact conductor plates are symmetrical arranged about the longitudinal midline of switch housing, pass through screw on the downside of the inner cavity of the switch housing
It is fixedly connected with retainer ring, swing arm conductor rods is connected with by pin shaft on the retainer ring, the upper end of the swing arm conductor rods extends in
Between two groups of contact conductor plates, the bottom end of the swing arm conductor rods is connect by pin shaft with push rod, the left side of the switch housing
Through slot is offered on the downside of wall, the push rod runs through through slot.
As an improvement of the above technical solution, the ripple air bag is rubber corrugated air bag, and the bottom end of ripple air bag is logical
It crosses bonding agent and is bonded with kickboard.
As an improvement of the above technical solution, air pressure adjustment valve is provided on the side wall of the hollow pillar stand.
As an improvement of the above technical solution, be connected with location collar on the outer wall of the appendix, and location collar with
The contact position of appendix is embedded with rubber pad.
As an improvement of the above technical solution, the expansion link mechanism includes sleeve and the piston rod that is plugged on sleeve,
The both ends of the sleeve and piston rod are screwed onto supporting block, on mounting plate respectively.
As an improvement of the above technical solution, the inner cavity of the sleeve is provided with reset spring, and the two of the reset spring
End is respectively supported at the intracavity bottom of sleeve and the bottom of piston rod.
As an improvement of the above technical solution, the switch housing is polyethylene switch housing, and the inner wall of switch housing
It is upper to be uniformly coated with polytetrafluorethylecoatings coatings.
As an improvement of the above technical solution, the upper end of the swing arm conductor rods is provided with contact conductor block, and contact is led
Body block runs through swing arm conductor rods and extends to the two sides of swing arm conductor rods upper end.
Compared with prior art, the beneficial effects of the present invention are:
1) pass through ripple air bag and push being used cooperatively for bellows, the mode for carrying out pneumatic transfer power can grow
The phenomenon that phase uses and can automatically reset, and reduces electronic component damage；
2) being used cooperatively by expansion link mechanism and supporting block, can assist ripple air bag air inlet return；
3) design method for passing through push rod connection switch component, carries out control switch component by mechanically operated mode
Control methods, stability in use are preferable.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural schematic diagram of expansion link mechanism of the present invention；
Fig. 3 is the schematic diagram of internal structure of switch block of the present invention；
Fig. 4 is the structural schematic diagram of retainer ring of the present invention.
In figure: 1 mounting plate, 2 ripple air bags, 3 supporting blocks, 4 expansion link mechanisms, 41 sleeves, 42 piston rods, 43 reset bullet
Spring, 5 hollow pillar stands, 6 appendixs, 7 push bellows, 8 push rods, 9 switch blocks, 91 switch housings, 92 contact conductor plates, 93 cards
Circle, 94 swing arm conductor rods, 95 through slots.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
Embodiment one:
Fig. 1,3,4 are please referred to, the present invention provides a kind of technical solution: a kind of novel water level sensor, including 1 He of mounting plate
The lower surface middle part of switch block 9, mounting plate 1 is provided with ripple air bag 2, and the lower surface two sides of mounting plate 1 are bolted with flexible
Linkage 4, the left and right sides bottom end of ripple air bag 2 are provided with supporting block 3, and the supporting block 3 of two sides is flexible with two sides respectively
The bottom end of linkage 4 is spirally connected, and the upper surface of mounting plate 1 is bolted with hollow pillar stand 5, and hollow pillar stand 5 is connected to ripple air bag 2, in
The upper end of empty column 5 is bolted with appendix 6, and the other end of appendix 6, which is socketed with, pushes bellows 7, pushes the right side of bellows 7
Push rod 8 is bonded on wall, the right end of push rod 8 extends to the inner cavity of switch block 9；
Switch block 9 includes switch housing 91 and two groups of contact conductor plates being fixed on the upside of 91 inner wall of switch housing
92, and two groups of contact conductor plates 92 are symmetrical arranged about the longitudinal midline of switch housing 91, it is logical on the downside of the inner cavity of switch housing 91
It crosses screw and is fixedly connected with retainer ring 93, swing arm conductor rods 94, the upper end of swing arm conductor rods 94 are connected with by pin shaft on retainer ring 93
It extends between two groups of contact conductor plates 92, the bottom end of swing arm conductor rods 94 is connect by pin shaft with push rod 8, switch housing 91
Through slot 95 is offered on the downside of left side wall, push rod 8 runs through through slot 95.
Embodiment two:
As shown in Figs 1-4, a kind of novel water level sensor, including mounting plate 1 and switch block 9, the lower surface of mounting plate 1
Middle part is provided with ripple air bag 2, and the lower surface two sides of mounting plate 1 are bolted with expansion link mechanism 4, the left and right two of ripple air bag 2
Side bottom end is provided with supporting block 3, and bottom end of the supporting block 3 of two sides respectively with the expansion link mechanism 4 of two sides is spirally connected, mounting plate 1
Upper surface be bolted with hollow pillar stand 5, hollow pillar stand 5 is connected to ripple air bag 2, and the upper end of hollow pillar stand 5 is bolted with appendix
6, the other end of appendix 6, which is socketed with, pushes bellows 7, pushes and is bonded with push rod 8, the right side of push rod 8 on the right side wall of bellows 7
End extends to the inner cavity of switch block 9；
Switch block 9 includes switch housing 91 and two groups of contact conductor plates being fixed on the upside of 91 inner wall of switch housing
92, and two groups of contact conductor plates 92 are symmetrical arranged about the longitudinal midline of switch housing 91, it is logical on the downside of the inner cavity of switch housing 91
It crosses screw and is fixedly connected with retainer ring 93, swing arm conductor rods 94, the upper end of swing arm conductor rods 94 are connected with by pin shaft on retainer ring 93
It extends between two groups of contact conductor plates 92, the bottom end of swing arm conductor rods 94 is connect by pin shaft with push rod 8, switch housing 91
Through slot 95 is offered on the downside of left side wall, push rod 8 runs through through slot 95.
Wherein, ripple air bag 2 is rubber corrugated air bag, and the bottom end of ripple air bag 2 is bonded with kickboard by bonding agent, is led to
The use of rubber material is crossed, can be used for a long time, toughness is preferable, can be assisted under the buoyancy of water by the setting of kickboard
It floats；
Air pressure adjustment valve is provided on the side wall of hollow pillar stand 5, it, can be to ripple by the setting of air pressure adjustment valve
Air pressure in air bag and promotion bellows is adjusted, so as to meet the control to switch block；
Location collar is connected on the outer wall of appendix 6, and the contact position of location collar and appendix 6 is embedded with rubber
Pad, carries out installation positioning action to appendix 6 by location collar, by the setting of rubber pad, plays the role of increasing friction；
Expansion link mechanism 4 includes sleeve 41 and the piston rod 42 that is plugged on sleeve 41, and the two of sleeve 41 and piston rod 42
End is screwed onto supporting block 3, on mounting plate 1 respectively, has the function of longitudinal extension, can to the progress guiding role of ripple air bag 2,
The phenomenon that avoiding ripple air bag from deviating；
The inner cavity of sleeve 41 is provided with reset spring 43, and the both ends of reset spring 43 are respectively supported at the interior bottom of chamber of sleeve 41
The bottom in portion and piston rod 42；
Switch housing 91 is polyethylene switch housing, and is uniformly coated with polytetrafluoroethylene (PTFE) on the inner wall of switch housing 91 and applies
Layer, switch housing 91 use polyethylene material, certain insulating effect are played, by the setting of polytetrafluorethylecoatings coatings, into one
Step improves insulation effect；
The upper end of swing arm conductor rods 94 is provided with contact conductor block, and contacts conductor block through swing arm conductor rods 94 and extend
To the two sides of 94 upper end of swing arm conductor rods.
Working principle: two groups of contact conductor plates 92 are connect with warning note equipment and motor by conducting wire respectively, are put
Contact conductor block on arm conductor rods 94 is connect by conducting wire with warning note equipment, motor simultaneously, and the above equipment is accessed
Alternating current so that when swing arm conductor rods 94 contact the contact conductor plate 92 of side, the contact conductor plate 92 with connect thereon
Warning note equipment or electric-motor pump connect circuit, and the contact conductor plate 92 for being normally set up left side passes through with warning note equipment leads
The contact conductor plate 92 of line connection, right side is connect by conducting wire with electric-motor pump；
Mounting plate 1 is fixedly mounted in water tank by screw, and makes the bottom end of ripple air bag 2 and the highest of setting
The height of liquid level is concordant, and the location collar and switch block 9 on appendix 6 are fixedly mounted in water tank by screw, and protects
The isolation (avoid being corroded for a long time by water and electrical part damaged condition occur) for holding switch block 9 Yu water, when water gradually on
When rising, the water surface is contacted with ripple air bag 2, generates ripple air bag 2 to buoyancy and ripple air bag 2 is made to shrink ripple air bag, together
When expansion link mechanism 4 shrink, reset spring 43 compressed and generated elastic force, and the gas in ripple air bag 2 passes through hollow pillar stand 5
It is flowed with appendix 6 into promotion bellows 7, so that bellows 7 is pushed to stretch, bellows 7 is pushed to push 8 right side of push rod
It moves, push rod 8 drives pin shaft of the swing arm conductor rods 94 on retainer ring 93 to rotate counterclockwise, thus swing arm conductor rods 94 and left side
It contacts conductor plate 92 to contact, so that warning note equipment connects circuit, plays alarm function, prompt water full；After water use, storage
Discharge reduction in water pot, under the elastic force effect of reset spring 43, the decline of ripple air bag 2 is resetted while being stretched, to push wave
Line pipe 7 under suction function by starting to shrink and push rod 8 being driven to move to left, so that swing arm conductor rods 94 are on retainer ring 93
Pin shaft rotates clockwise, so that contact conductor plate 92 of the swing arm conductor rods 94 with right side contacts, electric-motor pump is connected circuit, thus
So that electric-motor pump carries out pumping action to water tank.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms；Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
Interior, any reference signs in the claims should not be construed as limiting the involved claims.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of novel water level sensor, including mounting plate (1) and switch block (9), it is characterised in that: the mounting plate (1)
Lower surface in the middle part of be provided with ripple air bag (2), the lower surface two sides of the mounting plate (1) are bolted with expansion link mechanism (4),
The left and right sides bottom end of the ripple air bag (2) is provided with supporting block (3), the supporting block (3) of two sides respectively with two sides
The bottom end of expansion link mechanism (4) be spirally connected, the upper surface of the mounting plate (1) is bolted with hollow pillar stand (5), the hollow pillar stand
(5) be connected to ripple air bag (2), the upper end of the hollow pillar stand (5) is bolted with appendix (6), the appendix (6) it is another
End cap, which is connected to, pushes bellows (7), is bonded with push rod (8) on the right side wall for pushing bellows (7), the push rod (8)
Right end extends to the inner cavity of switch block (9)；
The switch block (9) includes switch housing (91) and two groups of contacts being fixed on the upside of switch housing (91) inner wall
Conductor plate (92), and two groups of contact conductor plates (92) are symmetrical arranged about the longitudinal midline of switch housing (91), outside the switch
It is fixedly connected with retainer ring (93) on the downside of the inner cavity of shell (91) by screw, swing arm is connected with by pin shaft on the retainer ring (93) and is led
Body rod (94), the upper end of the swing arm conductor rods (94) extend between two groups of contact conductor plates (92), the swing arm conductor rods
(94) bottom end is connect by pin shaft with push rod (8), offers through slot (95), institute on the downside of the left side wall of the switch housing (91)
Push rod (8) are stated through through slot (95).
2. a kind of novel water level sensor according to claim 1, it is characterised in that: the ripple air bag (2) is rubber
Ripple air bag, and the bottom end of ripple air bag (2) is bonded with kickboard by bonding agent.
3. a kind of novel water level sensor according to claim 1, it is characterised in that: the side wall of the hollow pillar stand (5)
On be provided with air pressure adjustment valve.
4. a kind of novel water level sensor according to claim 1, it is characterised in that: on the outer wall of the appendix (6)
It is connected with location collar, and the contact position of location collar and appendix (6) is embedded with rubber pad.
5. a kind of novel water level sensor according to claim 1, it is characterised in that: the expansion link mechanism (4) includes
The both ends of sleeve (41) and the piston rod (42) being plugged on sleeve (41), the sleeve (41) and piston rod (42) are spirally connected respectively
On supporting block (3), mounting plate (1).
6. a kind of novel water level sensor according to claim 5, it is characterised in that: the inner cavity of the sleeve (41) is arranged
Have reset spring (43), the both ends of the reset spring (43) are respectively supported at the intracavity bottom and piston rod (42) of sleeve (41)
Bottom.
7. a kind of novel water level sensor according to claim 1, it is characterised in that: the switch housing (91) is poly- second
Alkene switch housing, and polytetrafluorethylecoatings coatings are uniformly coated on the inner wall of switch housing (91).
8. a kind of novel water level sensor according to claim 1, it is characterised in that: the swing arm conductor rods (94) it is upper
End is provided with contact conductor block, and contacts conductor block through swing arm conductor rods (94) and extend to swing arm conductor rods (94) upper end
Two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212746.1A CN110006503A (en) | 2019-03-20 | 2019-03-20 | A kind of novel water level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212746.1A CN110006503A (en) | 2019-03-20 | 2019-03-20 | A kind of novel water level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110006503A true CN110006503A (en) | 2019-07-12 |
Family
ID=67167458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910212746.1A Pending CN110006503A (en) | 2019-03-20 | 2019-03-20 | A kind of novel water level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110006503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516703A (en) * | 2020-11-25 | 2021-03-19 | 杨秀英 | Chemical industry enterprise factory building big environmental gas clarification plant |
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| FR673476A (en) * | 1929-04-17 | 1930-01-15 | Advanced pneumatic fuel level indicator | |
| GB1421253A (en) * | 1973-05-21 | 1976-01-14 | Bestobell Mobrey Ltd | Float operated signalling device |
| CN87207470U (en) * | 1987-09-05 | 1988-03-09 | 南昌市工业技术开发中心自动化所 | Pneumatic dry-reed water level sensor |
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| US20060169039A1 (en) * | 2005-02-01 | 2006-08-03 | Veeder-Root Company | Fuel density measurement device, system, and method |
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| CN206095357U (en) * | 2016-07-13 | 2017-04-12 | 广东广业云硫矿业有限公司 | Pneumatic level gauge device of mine sewage treatment |
| CN106840429A (en) * | 2017-03-27 | 2017-06-13 | 上海置信电气非晶有限公司 | A kind of device of link-type duplex measurement temperature and liquid level |
| CN206905843U (en) * | 2017-07-06 | 2018-01-19 | 青岛德曼尼电子科技有限责任公司 | A kind of water warming blanket level sensor |
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| CN108181039A (en) * | 2017-12-29 | 2018-06-19 | 泉州市大西洋电力科技有限公司 | Hydrostatic sensor |
| CN208420101U (en) * | 2018-05-11 | 2019-01-22 | 泉州惠安泉创文化用品有限公司 | A kind of water conservancy flood situation automatic on-line monitoring alarm |
| CN109313067A (en) * | 2016-07-08 | 2019-02-05 | 东芝产业机器系统株式会社 | Liquid level display device and liquid-cooled electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR673476A (en) * | 1929-04-17 | 1930-01-15 | Advanced pneumatic fuel level indicator | |
| GB1421253A (en) * | 1973-05-21 | 1976-01-14 | Bestobell Mobrey Ltd | Float operated signalling device |
| CN87207470U (en) * | 1987-09-05 | 1988-03-09 | 南昌市工业技术开发中心自动化所 | Pneumatic dry-reed water level sensor |
| EP0534828A1 (en) * | 1991-09-25 | 1993-03-31 | Forges De Belles-Ondes | Level detector in the interior of a recipient containing granular matter, particularly sand |
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| CN109313067A (en) * | 2016-07-08 | 2019-02-05 | 东芝产业机器系统株式会社 | Liquid level display device and liquid-cooled electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516703A (en) * | 2020-11-25 | 2021-03-19 | 杨秀英 | Chemical industry enterprise factory building big environmental gas clarification plant |
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