Capacitive non-contact liquid level sensor convenient to install

Abstract

The invention relates to the technical field of liquid level sensors, and particularly discloses a convenient-to-mount capacitive non-contact liquid level sensor which comprises a mounting plate, a mounting groove is formed in one end of the mounting plate, a protective shell is movably connected into the mounting groove, the protective shell is in inserted connection with the mounting groove, and a liquid level sensor body is fixedly connected into the protective shell. A protective cover is hinged to one end of the protective shell, connecting blocks are symmetrically and fixedly connected to the two ends of the protective shell, fixing assemblies are installed in the connecting blocks, fixing blocks are symmetrically and fixedly connected to the two ends of the mounting plate, limiting assemblies are installed in the fixing blocks, locking grooves are symmetrically formed in the two ends of the mounting plate, and unlocking blocks are installed in the locking grooves. By the adoption of the structure, complex installation steps and tools are not needed, the installation process is simplified, the time and labor cost needed for installation are reduced, the working efficiency is improved, disassembly work can be completed by one person, and time consumption of communication, coordination and the like possibly caused by cooperation of multiple persons is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of liquid level sensors, in particular to a capacitive non-contact liquid level sensor which is easy to install. Background Art

[0002] A liquid level sensor is a device used to measure the height, depth or area of ​​a liquid. Its working principle is based on a variety of methods such as static pressure, buoyancy, capacitance change, ultrasonic or optical properties of the liquid. Non-contact liquid level sensors usually use the propagation characteristics of sound waves, microwaves, lasers or other electromagnetic waves to measure the liquid level. When these beams encounter different media, reflection, refraction or scattering will occur. The sensor determines the liquid level by receiving changes in these beams. Among them, the capacitive non-contact liquid level sensor is a device that uses capacitance changes to measure the liquid level. The working principle is to convert physical quantities such as liquid level into capacitance changes, which are processed and converted into voltage or current output through circuits. Specifically, the sensor measures the liquid level through changes in capacitance between adjacent electrodes. When the liquid level changes, the capacitance value between the electrodes will also change accordingly. This change is captured by the sensor and converted into a measurable electrical signal.

[0003] Publication number "CN218496209U" is a capacitive non-contact liquid level sensor, including a water tank, one side of the water tank is fixedly connected to a mounting shell, the interior of the mounting shell is clamped with a liquid level sensor body, the two symmetrical sides of the liquid level sensor body are fixedly connected to first positioning plates, one side of the two first positioning plates is provided with a first positioning hole, and one side of the mounting shell is provided with a first positioning groove. The advantage of the present invention is that through the coordinated arrangement of the mounting shell, the liquid level sensor body, the first positioning plate, the first positioning hole, the first positioning groove, the screw rod, the knob, the U-shaped movable frame and the positioning rod, the operation of installing and disassembling the liquid level sensor body is relatively simple, and the liquid level sensor body can be quickly installed and disassembled without the aid of external tools, thereby improving the efficiency of installing and disassembling the liquid level sensor body.

[0004] Although the above invention makes the installation and disassembly of the liquid level sensor body relatively simple and can quickly install and disassemble the liquid level sensor body without the aid of external tools, thereby improving the efficiency of installing and disassembling the liquid level sensor body, it is essentially still installed in a threaded connection manner, which may become complicated when disassembling or reinstalling the sensor, and the surface of the screw rod is easily damaged and an oxide layer is produced, which may cause the threaded connection to bite, making disassembly difficult, and during long-term use, especially in a humid or corrosive environment, the screw rod is prone to rust, which may cause the connection to loosen or leak. Summary of the invention

[0005] The object of the present invention is to provide a capacitive non-contact liquid level sensor that is easy to install, so as to solve the problem that the installation adopts a threaded connection method proposed in the above background technology, which may become complicated when the sensor is disassembled or reinstalled, and the surface of the screw rod is easily damaged and an oxide layer is produced, which may cause the threaded connection to bite, making disassembly difficult.

[0006] To achieve the above-mentioned purpose, the present invention provides a capacitive non-contact liquid level sensor that is easy to install, including a mounting plate, a mounting groove is provided at one end of the mounting plate, a protective shell is movably connected inside the mounting groove, the protective shell and the mounting groove are plugged, a liquid level sensor body is fixedly connected inside the protective shell, a protective cover is hinged at one end of the protective shell, connecting blocks are symmetrically fixedly connected at both ends of the protective shell, a fixing component is installed inside the connecting block, fixing blocks are symmetrically fixedly connected at both ends of the mounting plate, a limiting component is installed inside the fixing block, locking grooves are symmetrically provided at both ends of the mounting plate, and an unlocking block is installed inside the locking groove;

[0007] The fixing component comprises a cavity, a first return spring, a movable plate, a locking block and an inclined surface, a cavity is opened inside the connecting block, one end of the cavity close to the protective shell is symmetrically fixedly connected with the first return spring, the other end of the first return spring is fixedly connected to the movable plate, the movable plate and the cavity are slidably connected, one end of the movable plate away from the first return spring is fixedly connected with the locking block, the locking block extends out of the side end of the connecting block at one end away from the movable plate, and one end of the locking block close to the mounting groove is set as an inclined surface, connecting grooves are symmetrically opened at both ends of the mounting groove, the connecting groove and the connecting block are plug-in, the connecting groove and the locking groove are connected, the locking block and the locking groove are snap-connected, the unlocking block and the locking groove are slidably connected, the limited blocks are symmetrically fixedly connected at both ends of the unlocking block, and the limited grooves are symmetrically opened at both ends of the locking groove, and the limit grooves are slidably connected to the limit block. No complicated installation steps and tools are required, the installation process is simplified, the time and labor costs required for installation are reduced, work efficiency is improved, and the liquid level sensor can be prevented from shaking, thereby improving the accuracy and reliability of installation.

[0008] In a further embodiment, the limit assembly includes an accommodating chamber, a second return spring, a moving block, a limit column, a sliding block and a pushing block. The fixed block is provided with an accommodating chamber, the upper end of the accommodating chamber is fixedly connected to the second return spring, the other end of the second return spring is fixedly connected to the moving block, one end of the moving block away from the second return spring is fixedly connected to the limit column, one end of the limit column away from the moving block extends out of the bottom end of the fixed block, one end of the moving block away from the protective shell is fixedly connected to the sliding block, one end of the sliding block away from the moving block extends out of the side end of the fixed block, one end of the sliding block away from the moving block is fixedly connected to the pushing block, one end of the fixed block is provided with a sliding groove, the sliding groove is connected to the accommodating chamber, the sliding groove and the sliding block are slidably connected, the upper end of the locking block is symmetrically provided with limit holes, the limit column and the limit hole are plug-in, the disassembly work can be completed by one person, avoiding the time consumption of communication and coordination that may be caused by the collaboration of multiple people.

[0009] In a further embodiment, fixing grooves are symmetrically provided at both ends of the protective shell, heat dissipation holes are symmetrically provided at one end of the fixing groove, a mounting frame is plugged into the fixing groove, a dustproof net is fixedly connected to the mounting frame, arc grooves are symmetrically provided at one end of the fixing groove away from the heat dissipation holes, magnetic grooves are symmetrically provided at one end of the fixing groove near the chamfer, magnetic blocks are symmetrically fixedly connected at one end of the mounting frame near the fixing groove near the chamfer, the magnetic blocks and the magnetic grooves are magnetically connected, and the installation and disassembly of the dustproof net can be completed without complicated installation steps and tools, which facilitates regular maintenance of the dustproof net. Regular maintenance of the dustproof net can effectively remove accumulated dust and dirt, maintain its good filtering performance, help extend the service life of the dustproof net, reduce the replacement frequency, and reduce maintenance costs.

[0010] In a further embodiment, an observation window is provided at one end of the protective cover, and transparent glass is fixedly connected to the inside of the observation window, so that it is convenient to check whether there is dirt or impurities accumulated inside the sensor, so as to perform cleaning and maintenance in time.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] First, in the present invention, the liquid level sensor body is fixed inside the protective shell, and then the protective shell is inserted into the installation groove, so that the connecting block is inserted into the connecting groove. During the insertion process, the extrusion force applies pressure to the inclined surface of one end of the locking block, so that the locking block drives the moving plate to compress the first reset spring, and the locking block retracts into the cavity. Then, when the locking block moves to the locking groove, the first reset spring is reset, and the moving plate rebounds to drive the locking block to pop out, and the locking block is clamped and fixed with the locking groove to complete the installation of the liquid level sensor body. No complicated installation steps and tools are required, which simplifies the installation process, reduces the time and labor costs required for installation, improves work efficiency, and can prevent the liquid level sensor from shaking, thereby improving the accuracy and reliability of installation.

[0013] Secondly, in the present invention, the push block is pushed to make the slider slide inside the slide groove, the slider drives the moving block and the limit column to move, the moving block is pressed against the second return spring, the limit column retracts into the accommodating cavity and ends the plugging with the limit hole, and then the unlocking block is pushed to make the unlocking block slide inside the locking groove, the unlocking block pushes the locking block to make the locking block retract into the cavity, the locking block ends the engagement with the locking groove, and the push block is released at the same time, the second return spring is reset, the moving block rebounds and drives the limit column to pop out and plug into the limit hole, the unlocking block is limited, the unlocking block on the other side is operated in the same way, the protective shell is taken out to the outside, and the disassembly of the liquid level sensor body is completed, and the disassembly work can be completed by one person, avoiding the time consumption of communication and coordination that may be caused by the collaboration of multiple people;

[0014] Thirdly, in the present invention, the arc groove is pressed outward to move the installation frame and the dustproof net outward, and at the same time, the installation frame and the fixed groove are plugged in, the installation frame is taken out from the inside of the fixed groove, and at the same time, the magnetic block and the magnetic groove are magnetically connected, and then the dustproof net inside the installation frame is cleaned. After cleaning, the installation frame is inserted into the fixed groove, and at the same time, the magnetic block is inserted into the magnetic groove and magnetically connected to complete the maintenance of the dustproof net. The installation and disassembly of the dustproof net can be completed without complicated installation steps and tools, which facilitates regular maintenance of the dustproof net. Regular maintenance of the dustproof net can effectively remove accumulated dust and dirt, maintain its good filtering performance, help extend the service life of the dustproof net, reduce the replacement frequency, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the liquid level sensor body in the present invention;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the protective shell in the present invention;

[0018] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the unlocking block in the present invention;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the dustproof net in the present invention;

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the mounting plate in the present invention;

[0021] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the limiting component in the present invention;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the unlocking block in the present invention.

[0023] In the figure: 1. mounting plate; 2. mounting groove; 3. protective shell; 4. liquid level sensor body; 5. connecting block; 6. connecting groove; 7. protective cover; 8. observation window; 9. transparent glass; 10. fixing assembly; 101. cavity; 102. first return spring; 103. moving plate; 104. locking block; 105. inclined plane; 11. locking groove; 12. unlocking block; 13. limiting block; 14. limiting groove; 15. fixing block; 16. limiting assembly; 161. accommodating cavity; 162. second return spring; 163. moving block; 164. limiting column; 165. slider; 166. pushing block; 17. limiting hole; 18. fixing groove; 19. mounting frame; 20. heat dissipation hole; 21. dustproof net; 22. magnetic block; 23. magnetic groove; 24. arc groove; 25. slide groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 8 In the embodiment of the present invention, a mounting plate 1 is included, a mounting groove 2 is provided at one end of the mounting plate 1, a protective shell 3 is movably connected inside the mounting groove 2, the protective shell 3 is plugged with the mounting groove 2, a liquid level sensor body 4 is fixedly connected inside the protective shell 3, a protective cover 7 is hinged at one end of the protective shell 3, connecting blocks 5 are symmetrically fixedly connected at both ends of the protective shell 3, a fixing component 10 is installed inside the connecting block 5, fixing blocks 15 are symmetrically fixedly connected at both ends of the mounting plate 1, a limiting component 16 is installed inside the fixing block 15, locking grooves 11 are symmetrically provided at both ends of the mounting plate 1, and an unlocking block 12 is installed inside the locking groove 11;

[0026] The fixing assembly 10 includes a cavity 101, a first return spring 102, a movable plate 103, a locking block 104 and an inclined surface 105. The cavity 101 is provided inside the connection block 5. The first return spring 102 is symmetrically fixedly connected to one end of the cavity 101 close to the protective shell 3. The other end of the first return spring 102 is fixedly connected to the movable plate 103. The movable plate 103 is slidably connected to the cavity 101. The end of the movable plate 103 away from the first return spring 102 is fixedly connected to the locking block 104. The end of the locking block 104 away from the movable plate 103 extends out of the side end of the connection block 5. The end of the locking block 104 close to the installation groove 2 is set as an inclined surface 105. The two ends of the installation groove 2 are symmetrically provided with connecting grooves 6. The connecting groove 6 and the connecting block 5 For plug-in, the connecting groove 6 is connected with the locking groove 11, and the locking block 104 is snap-connected with the locking groove 11. The liquid level sensor body 4 is fixed inside the protective shell 3, and then the protective shell 3 is inserted into the mounting groove 2, so that the connecting block 5 is inserted into the connecting groove 6. During the insertion process, the extrusion force exerts pressure on the inclined surface 105 at one end of the locking block 104, so that the locking block 104 drives the moving plate 103 to compress the first reset spring 102, and the locking block 104 retracts into the cavity 101. Then, when the locking block 104 moves to the locking groove 11, the first reset spring 102 is reset, and the moving plate 103 rebounds to drive the locking block 104 to pop out, and the locking block 104 is snap-connected and fixed with the locking groove 11 to complete the installation of the liquid level sensor body 4.

[0027] See also Figures 7 and 8 The unlocking block 12 is slidably connected to the locking groove 11, and the limiting block 13 is symmetrically fixedly connected to both ends of the unlocking block 12. The limiting grooves 14 are symmetrically arranged at both ends inside the locking groove 11, and the limiting grooves 14 and the limiting block 13 are slidably connected. The limiting of the unlocking block 12 is ended by the limiting assembly 16, and then the unlocking block 12 is pushed to make the unlocking block 12 slide inside the unlocking groove. At the same time, the limiting block 13 slides inside the limiting groove 14, and the unlocking block 12 pushes the locking block 104, so that the locking block 104 drives the moving plate 103 to compress the first return spring 102, and the locking block 104 retracts into the cavity 101, and the locking block 104 ends the engagement with the locking groove 11, completing the unlocking of the locking block 104.

[0028] See also Figure 7The limiting assembly 16 includes an accommodating chamber 161, a second return spring 162, a moving block 163, a limiting column 164, a slider 165 and a push block 166. The fixed block 15 is provided with an accommodating chamber 161, the upper end of the accommodating chamber 161 is fixedly connected to the second return spring 162, the other end of the second return spring 162 is fixedly connected to the moving block 163, one end of the moving block 163 away from the second return spring 162 is fixedly connected to the limiting column 164, one end of the limiting column 164 away from the moving block 163 extends out of the bottom end of the fixed block 15, one end of the moving block 163 away from the protective shell 3 is fixedly connected to the slider 165, one end of the slider 165 away from the moving block 163 extends out of the side end of the fixed block 15, one end of the slider 165 away from the moving block 163 is fixedly connected to the push block 166, and one end of the fixed block 15 is provided with a The slide groove 25 is connected with the accommodating chamber 161, and the slide groove 25 is slidably connected with the slider 165. The upper end of the locking block 104 is symmetrically provided with a limiting hole 17, and the limiting column 164 is plugged into the limiting hole 17. The push block 166 is pushed to make the slider 165 slide inside the slide groove 25, and the slider 165 drives the moving block 163 and the limiting column 164 to move. The moving block 163 is pressed toward the second return spring 162, and the limiting column 164 retracts into the accommodating chamber 161 and ends the plugging with the limiting hole 17, thereby ending the limiting of the unlocking block 12. When the unlocking block 12 pushes the locking block 104 to end the engagement with the locking groove 11, the push block 166 is released, the second return spring 162 is reset, and the moving block 163 rebounds to drive the limiting column 164 to pop out and plug into the limiting hole 17, thereby performing a secondary limiting on the unlocking block 12.

[0029] See also Figure 5 The protective shell 3 has symmetrically opened fixing grooves 18 at both ends, and a heat dissipation hole 20 is symmetrically opened at one end of the fixing groove 18. A mounting frame 19 is inserted into the fixing groove 18, and a dustproof net 21 is fixedly connected to the mounting frame 19. An arc groove 24 is symmetrically opened at one end of the fixing groove 18 away from the heat dissipation hole 20. A magnetic suction groove 23 is symmetrically opened near the chamfer at one end of the fixing groove 18. A magnetic suction block 22 is symmetrically fixedly connected near the chamfer at one end of the mounting frame 19 near the fixing groove 18. The magnetic suction block 22 and the magnetic suction groove 23 are Magnetic connection, push the arc groove 24 outward to move the installation frame 19 and the dustproof net 21 outward, and at the same time, the installation frame 19 and the fixed groove 18 are plugged in, and the installation frame 19 is taken out from the inside of the fixed groove 18, and at the same time, the magnetic block 22 and the magnetic groove 23 are magnetically connected, and then the dustproof net 21 inside the installation frame 19 is cleaned. After cleaning, the installation frame 19 is inserted into the fixed groove 18, and the magnetic block 22 is inserted into the magnetic groove 23 and magnetically connected to complete the maintenance of the dustproof net 21.

[0030] See also Figure 1An observation window 8 is provided at one end of the protective cover 7, and a transparent glass 9 is fixedly connected inside the observation window 8. The operation of the liquid level sensor inside the protective shell 3 can be observed through the observation window 8.

[0031] The working principle of the present invention is as follows: first, the liquid level sensor body 4 is fixed inside the protective shell 3, and then the protective shell 3 is inserted into the mounting groove 2, so that the connecting block 5 is inserted into the connecting groove 6. During the insertion process, the extrusion force exerts pressure on the inclined surface 105 at one end of the locking block 104, so that the locking block 104 drives the moving plate 103 to compress the first return spring 102, and the locking block 104 retracts into the cavity 101. Then, when the locking block 104 moves to the locking groove 11, the first return spring 102 is reset, and the moving plate 103 rebounds and drives the locking block 104 to pop out, and the locking block 104 is clamped and fixed with the locking groove 11 to complete the installation of the liquid level sensor body 4. When the liquid level sensor needs to be disassembled, the push block 166 is pushed to make the slider 165 slide inside the slide groove 25, and the slider 165 drives the moving block 163 and the limiting column 164 to move, and the moving block 163 presses against the second reset spring 162, and the limiting column 164 retracts into the accommodating cavity 161 and ends the plugging with the limiting hole 17, and then the unlocking block 12 is pushed to make The unlocking block 12 slides inside the locking groove 11, and the unlocking block 12 pushes the locking block 104 to retract the locking block 104 into the cavity 101. The locking block 104 ends the engagement with the locking groove 11, and the pushing block 166 is released at the same time. The second reset spring 162 resets, and the moving block 163 rebounds to drive the limiting column 164 to pop out and plug into the limiting hole 17, and the unlocking block 12 is limited. The unlocking block 12 on the other side is operated in the same way, and the protective shell 3 is taken out to the outside to complete the disassembly of the liquid level sensor body 4. When the dustproof cover needs to be removed, When cleaning the net 21, the arc groove 24 is pressed outward to move the installation frame 19 and the dustproof net 21 outward, and the installation frame 19 and the fixed groove 18 are plugged in, and the installation frame 19 is taken out from the inside of the fixed groove 18, and the magnetic suction block 22 and the magnetic suction groove 23 are magnetically connected, and then the dustproof net 21 inside the installation frame 19 is cleaned. After the cleaning is completed, the installation frame 19 is inserted into the fixed groove 18, and the magnetic suction block 22 is inserted into the magnetic suction groove 23 and magnetically connected, and the maintenance of the dustproof net 21 is completed;

[0032] The present invention does not require complicated installation steps and tools, simplifies the installation process, reduces the time and labor costs required for installation, improves work efficiency, and a single person can complete the disassembly work, avoiding the time consumption of communication and coordination caused by the collaboration of multiple people.

Claims

1. A capacitive non-contact liquid level sensor that is easy to install, characterized in that: It includes a mounting plate, one end of the mounting plate is provided with a mounting groove, a protective shell is movably connected inside the mounting groove, the protective shell and the mounting groove are plugged, a liquid level sensor body is fixedly connected inside the protective shell, one end of the protective shell is hinged with a protective cover, two ends of the protective shell are symmetrically fixedly connected with connecting blocks, a fixing component is installed inside the connecting block, two ends of the mounting plate are symmetrically fixedly connected with fixing blocks, a limiting component is installed inside the fixing block, two ends of the mounting plate are symmetrically provided with locking grooves, and an unlocking block is installed inside the locking groove; The fixing assembly includes a cavity, a first return spring, a movable plate, a locking block and an inclined surface. A cavity is opened inside the connecting block. The first return spring is symmetrically fixedly connected to one end of the cavity close to the protective shell. The other end of the first return spring is fixedly connected to the movable plate. The movable plate and the cavity are slidably connected. The locking block is fixedly connected to one end of the movable plate away from the first return spring. The end of the locking block away from the movable plate extends out of the side end of the connecting block, and the end of the locking block close to the mounting groove is set as an inclined surface.

2. The capacitive non-contact liquid level sensor that is easy to install according to claim 1, characterized in that: The two ends of the installation groove are symmetrically provided with connecting grooves, the connecting grooves and the connecting blocks are plug-connected, the connecting grooves are communicated with the locking grooves, and the locking blocks and the locking grooves are snap-connected.

3. The capacitive non-contact liquid level sensor that is easy to install according to claim 1, characterized in that: The unlocking block is slidably connected to the locking groove, and the two ends of the unlocking block are symmetrically fixedly connected to the limiting blocks. The two ends of the locking groove are symmetrically provided with limiting grooves, and the limiting grooves are slidably connected to the limiting blocks.

4. The capacitive non-contact liquid level sensor that is easy to install according to claim 1, characterized in that: The limiting assembly includes an accommodating chamber, a second return spring, a moving block, a limiting column, a sliding block and a pushing block, the fixed block is provided with an accommodating chamber inside, the upper end of the accommodating chamber is fixedly connected to the second return spring, the other end of the second return spring is fixedly connected to the moving block, one end of the moving block away from the second return spring is fixedly connected to the limiting column, one end of the limiting column away from the moving block extends out of the bottom end of the fixed block, one end of the moving block away from the protective shell is fixedly connected to the sliding block, one end of the sliding block away from the moving block extends out of the side end of the fixed block, and one end of the sliding block away from the moving block is fixedly connected to the pushing block.

5. The capacitive non-contact liquid level sensor that is easy to install according to claim 4, characterized in that: A sliding groove is provided at one end of the fixing block, the sliding groove is communicated with the accommodating cavity, and the sliding groove is slidably connected with the sliding block.

6. The capacitive non-contact liquid level sensor that is easy to install according to claim 5, characterized in that: The upper end of the locking block is symmetrically provided with limiting holes, and the limiting columns are plugged into the limiting holes.

7. The capacitive non-contact liquid level sensor that is easy to install according to claim 1, characterized in that: The protective shell has symmetrically opened fixing grooves at both ends, heat dissipation holes are symmetrically opened at one end of the fixing groove, an installation frame is inserted into the fixing groove, a dustproof net is fixedly connected to the installation frame, and arc grooves are symmetrically opened at one end of the fixing groove away from the heat dissipation holes.

8. The capacitive non-contact liquid level sensor that is easy to install according to claim 7, characterized in that: A magnetic suction groove is symmetrically provided near the chamfer at one end of the fixing groove, and a magnetic suction block is symmetrically fixedly connected at one end of the installation frame near the fixing groove near the chamfer, and the magnetic suction block is magnetically connected to the magnetic suction groove.

9. The capacitive non-contact liquid level sensor that is easy to install according to claim 1, characterized in that: An observation window is provided at one end of the protective cover, and transparent glass is fixedly connected inside the observation window.

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