Vibrating tuning fork level sensor probe arrangement

Abstract

A vibratory tuning fork level sensor probe arrangement (100) for a can, comprising: a first vibratory tuning fork level sensor (102); a second vibratory tuning fork level sensor (104); and a conduit (106) configured to hold the first vibratory tuning fork level sensor in a first position and to hold the second vibratory tuning fork level sensor in a second position at a predetermined distance from the first vibratory tuning fork level sensor, the first vibratory tuning fork level sensor and the second vibratory tuning fork level sensor are configured to determine a position of an interface of the material in the tank.

Description

Technical Field

[0001] This invention relates to a probe arrangement for a vibrating tuning fork level sensor. Specifically, this invention pertains to a probe arrangement comprising multiple vibrating tuning fork level sensors. Background Technology

[0002] Level sensors are widely used in various industries, including chemical processing, oil and gas, food and beverage, and water treatment, to monitor and control the amount of material (liquid, solid, or particulate matter) contained in tanks, containers, and other storage units. Among the different types of level sensing technologies available, vibrating tuning fork level sensors are commonly used to detect the presence of material at specific points in tanks due to their reliability and accuracy.

[0003] Vibrating tuning fork sensors typically consist of pairs of teeth that oscillate at a specific frequency. When the teeth are immersed in material, the oscillation frequency changes, allowing the sensor to detect the presence of the material. This technology is particularly effective for detecting liquid levels and is valued for its robustness, ease of installation, and minimal maintenance requirements. Summary of the Invention

[0004] The purpose of this invention is to provide an improved arrangement of the vibrating tuning fork level sensor probe.

[0005] According to a first aspect of the invention, a vibrating tuning fork level sensor probe arrangement for a tank is provided, the arrangement comprising: a first vibrating tuning fork level sensor; a second vibrating tuning fork level sensor; and a conduit configured to hold the first vibrating tuning fork level sensor in a first position and the second vibrating tuning fork level sensor in a second position, wherein the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor are configured to determine the position of an interface of materials in the tank.

[0006] By utilizing a first vibrating tuning fork level sensor and a second vibrating tuning fork level sensor held at different positions by a single pipe, the described arrangement simplifies installation and reduces overall cost. Conventional systems typically require multiple tank penetrations, one for each level to be measured, leading to increased complexity and cost in both installation and maintenance. In contrast, the probe arrangement of this disclosure requires only a single penetration point, thereby minimizing the costs associated with drilling, sealing, and maintaining multiple inlets in the tank.

[0007] Furthermore, this arrangement enhances measurement capabilities by enabling the detection of material at multiple levels within the tank using only a single probe. This allows for the measurement of various material levels or the detection of interfaces between different fluids or materials, all using a single device. The design also provides flexibility in sensor placement, as the piping allows the vibrating tuning fork sensor to be held in different positions. This flexibility enables the sensor to be precisely positioned at different heights or locations within the tank, improving the accuracy and resolution of level measurements and allowing for the detection of more complex level profiles.

[0008] Another advantage of the described probe arrangement is improved tank integrity and safety. By reducing the number of tank penetrations required, the described invention reduces the risk of leaks or structural weaknesses that could compromise tank integrity. This results in a safer and more durable tank system, which is particularly important in applications involving hazardous or corrosive materials.

[0009] Furthermore, the probe arrangement is compatible with existing tank designs, allowing for easy integration without significant modifications. This makes the invention suitable for retrofitting older tanks, thereby extending their service life and functionality with minimal additional cost. Moreover, because this arrangement allows for the placement of multiple vibrating tuning fork sensors at different material levels, it offers the potential for enhanced media differentiation, such as distinguishing different types of materials or interfaces like oil and water. This capability is invaluable in applications where accurate media differentiation is critical for process control or safety monitoring.

[0010] According to an example embodiment, a first vibrating tuning fork level sensor is arranged to operate at a first frequency, and a second vibrating tuning fork level sensor is arranged to operate at a second frequency different from the first frequency. Operating the two sensors at different frequencies allows for independent and simultaneous detection of material levels at different locations within the tank. Using two different frequencies also reduces the risk of signal interference between the sensors, thereby improving the accuracy of detecting multiple levels or interfaces.

[0011] According to the example implementation, the pipe forms a uniform tubular channel. This uniform tubular channel simplifies the manufacturing process and ensures structural integrity along the entire length of the pipe. This reduces the likelihood of weaknesses or inconsistencies that could lead to failure or reduced durability. It also ensures consistent sensor positioning, which contributes to more accurate and reliable level detection. Furthermore, wiring within the pipe can be simplified.

[0012] According to the example implementation, the piping is formed as a single piece. This single-piece construction eliminates joints or seams that could become potential points of leakage or failure, thereby enhancing the overall robustness and lifespan of the probe. The use of single-piece piping also minimizes manufacturing complexity and reduces costs by avoiding the need for additional assembly steps or sealing measures.

[0013] According to an example embodiment, the conduit is a forked conduit, comprising a first branch holding a first vibrating tuning fork level sensor and a second branch holding a second vibrating tuning fork level sensor. For example, the forked conduit design allows the sensors to be positioned in different spatial orientations within the tank, increasing the flexibility of sensor placement and enabling material level detection at different angles or locations, thus adapting to tanks of different shapes or sizes and improving the sensor's adaptability to specific application requirements. Furthermore, the forked conduit allows the sensors to be placed in locations that would otherwise be difficult to access.

[0014] According to an example implementation, the probe arrangement also includes a sensor body configured to be disposed at the interface between the interior and exterior of the tank, with conduit connected to the sensor body. The integrated sensor body, which abuts against the tank wall, provides a stable mounting point and allows for secure attachment of the probe arrangement, facilitating proper alignment and installation while simplifying maintenance and replacement. Using a single sensor body to connect the probe arrangement to the exterior of the tank also helps maintain tank integrity by minimizing potential leak points.

[0015] According to an example implementation, the sensor body has a first diameter, and both the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor are arranged within the first diameter. By restricting the sensor arrangement to a specific diameter, the probe can be installed in a tank with a limited or standardized penetration size. This facilitates compatibility with existing tank fittings and reduces the need for custom installations, making the probe arrangement more versatile and easier to deploy in a range of applications.

[0016] According to an example implementation, the conduit is rotatably connected to the sensor body, allowing for rotational adjustment of the conduit relative to the sensor body. This rotatable connection enables easy adjustment of the sensor orientation during manufacturing or installation, allowing for selective sensor positioning to accommodate varying tank geometry or fine-tuning of sensor alignment for maximum sensitivity and accuracy. The rotatable connection also reduces downtime in cases where adjustments are required after installation.

[0017] According to an example embodiment, the probe arrangement is configured to be horizontally mounted in the tank, and the conduit includes two parallel branches that hold a first vibrating tuning fork level sensor and a second vibrating tuning fork level sensor, such that the vertical distance between the two sensors can be controlled by rotating the conduit relative to the sensor body. Horizontal mounting capability is advantageous in tanks where vertical space is limited or horizontal measurement is preferred. Furthermore, horizontal mounting within the tank wall may be preferred in applications requiring measurement of levels near the bottom of the tank. Additionally, the ability to control the vertical distance between the sensors by rotating the conduit provides greater flexibility in detecting specific levels or interfaces, thereby enhancing the versatility and application range of the probe arrangement.

[0018] According to an example implementation, each of the first and second vibrating tuning fork level sensors is rotatably connected to the pipe to achieve relative rotational alignment of the respective first and second vibrating tuning fork level sensors. This ability to rotate each sensor independently provides additional adjustment capability, such as ensuring that the two tuning forks have the same alignment with respect to any rotational position of the pipe, thereby ensuring that each sensor can be optimally positioned for a specific measurement task, improving overall detection accuracy and reliability.

[0019] According to the example implementation, when the probe arrangement is installed in the tank, the first vibrating tuning fork level sensor is configured to be positioned at a predetermined vertical distance from the second vibrating tuning fork level sensor. This predetermined vertical distance between the sensors ensures consistent and repeatable measurement positions. Installation is also simplified by providing a standard reference point for sensor placement.

[0020] According to an example implementation, the probe arrangement includes alignment marks configured to define rotational alignment of the probe arrangement when it is horizontally positioned in the container. The alignment marks simplify the installation process by providing a clear visual reference for correct sensor orientation, thereby reducing the risk of installation errors and ensuring the sensor is positioned as intended.

[0021] According to an example embodiment, a first vibrating tuning fork level sensor is connected to a first pipe section, and a second vibrating tuning fork level sensor is connected to a second pipe section parallel to the first pipe section, wherein the first pipe section is longer than the second pipe section, and the first pipe section includes a recessed portion; and the second vibrating tuning fork level sensor is at least partially disposed within the recessed portion of the first pipe section. This described configuration allows for the compact placement of multiple sensors very close together while minimizing the space required within the tank. This enables efficient use of space in smaller tanks or in applications requiring minimal intrusion into the tank. Additionally, the recessed portion provides physical protection for the sensor, reducing the risk of damage.

[0022] According to the example implementation, each of the first and second vibrating tuning fork level sensors is connected to the sensor control unit using a separate wiring. This separate wiring for each sensor allows for independent control and monitoring, enhancing the system's flexibility and functionality, as multiple levels can be detected simultaneously without interference or crosstalk between signals. The use of separate wiring also provides redundancy, ensuring that a failure in one sensor or wiring does not affect the operation of other sensors or wiring.

[0023] According to an example embodiment, the probe arrangement also includes a control unit configured to individually control each of the first and second vibrating tuning fork level sensors. This dedicated control unit, with individual sensor control, enables fine-grained management of the sensors, such as selecting a specific sensor for operation, adjusting settings, and / or performing individual signal processing.

[0024] Other features and advantages of the invention will become apparent as the appended claims and the following description are examined. Those skilled in the art will recognize that different features of the invention can be combined to create embodiments other than those described below, without departing from the scope of the invention. Attached Figure Description

[0025] These and other aspects of the invention will now be described in more detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the invention, in which:

[0026] Figure 1 The arrangement of the vibrating tuning fork level sensor probe according to an example embodiment is schematically shown;

[0027] Figure 2 The arrangement of vibrating tuning fork level sensor probes in a tank according to an example embodiment is schematically shown.

[0028] Figure 3 The arrangement of the vibrating tuning fork level sensor probe according to an example embodiment is schematically shown;

[0029] Figure 4 The arrangement of the vibrating tuning fork level sensor probe according to an example embodiment is schematically shown;

[0030] Figure 5 The arrangement of the vibrating tuning fork level sensor probe according to an example embodiment is schematically shown;

[0031] Figure 6 The arrangement of the vibrating tuning fork level sensor probes in a tank according to an example embodiment is schematically shown.

[0032] Figure 7This is a graph summarizing the frequency characteristics of a vibrating tuning fork level sensor according to an example embodiment. Detailed description of example implementation methods

[0033] In this detailed description, various embodiments of the vibrating tuning fork level sensor probe arrangement according to the present invention are described primarily with reference to probe arrangements installed in tanks located on land. However, the described systems and methods are also applicable to other fields, such as marine applications.

[0034] Figure 1 A schematic diagram illustrates a vibrating tuning fork level sensor probe arrangement 100 for a tank according to an exemplary embodiment. The probe arrangement includes a first vibrating tuning fork level sensor 102, a second vibrating tuning fork level sensor 104, and a conduit 106 configured to hold the first vibrating tuning fork level sensor 102 in a first position and the second vibrating tuning fork level sensor 104 in a second position at a predetermined distance from the first vibrating tuning fork level sensor 102. Each of the first vibrating tuning fork level sensor 102 and the second vibrating tuning fork level sensor 104 is configured to determine the position of the interface between materials in the tank. In the described probe arrangement 100, the distance between the first and second vibrating tuning fork level sensors can be controlled with high accuracy, which in turn allows not only the material level to be determined but also the interface between the two materials to be characterized with high precision.

[0035] In the example embodiment, the first vibrating tuning fork level sensor 102 is arranged to operate at a first frequency, and the second vibrating tuning fork level sensor 104 is arranged to operate at a second frequency different from the first frequency. The first and second frequencies can be two different frequencies around 1400 Hz, a known operating frequency of the vibrating tuning fork level sensor. Alternatively, the two sensors 102 and 104 can be configured with a large frequency interval, for example, the first vibrating tuning fork level sensor 102 operates at 600 Hz and the second vibrating tuning fork level sensor 104 operates at 1500 Hz. A larger frequency interval reduces the risk of interference between the two sensors. Furthermore, the behavior of the sensors when immersed in material can be frequency-dependent, which in turn leads to the possibility of using two sensors operating at different frequencies to characterize the material properties in the sensor arrangement.

[0036] The conduit 106 is shown as a uniform tubular channel formed as a single piece. Furthermore, the conduit 106 shown is a forked conduit, comprising a first branch 108 holding the first vibrating tuning fork level sensor 102 and a second branch 110 holding the second vibrating tuning fork level sensor 104.

[0037] The conduit 106 can be a hollow tube, with cables extending approximately from the middle of the conduit to each of the first sensor 102 and the second sensor 104. Furthermore, in the illustrated example, the tuning fork of the first vibrating tuning fork level sensor 102 has the same alignment as the tuning fork of the second vibrating tuning fork level sensor 104; that is, both the first sensor 102 and the second sensor are vertically aligned. However, it is not required that all sensors in the probe arrangement have the same alignment. The advantage of providing a probe arrangement where all sensors have the same alignment is that the overall diameter of the probe arrangement can be minimized.

[0038] As described below, the described probe arrangement provides a vibrating tuning fork level sensor arrangement with clearly defined and predefined distances between sensors, enabling accurate interface characterization. The described probe arrangement 100 can also provide redundancy in applications where level measurement is critical. Thus, two or more vibrating tuning fork level sensors can be arranged at the same level while still using only one tank connection.

[0039] The probe arrangement 100 also includes a sensor body 112 configured to be disposed at the interface between the interior and exterior of the tank, wherein the conduit 106 is connected to the sensor body 112. The sensor body 112 can be considered to comprise two parts, one inside and one outside the tank, disposed within a through-opening in the tank. Using a single sensor body 112 for multiple sensors allows for closer sensor positioning compared to using individual sensors. Furthermore, installation is simplified and the internal volume occupied within the tank is reduced compared to using multiple individual sensors.

[0040] The sensor body 112 also includes an alignment mark 114, shown herein as a notch 114, to facilitate proper alignment of the probe arrangement during installation. In some embodiments, the sensor body may be an entirely metal component with the sensor electronics housed in an external package of the can. However, sensing circuitry may also be arranged within the sensor body. The vibrating tuning fork level sensors 102, 104 typically include a crystal for driving the vibrating tuning fork, but they may also include isolation circuitry, and in some applications, additional sensing circuitry may be arranged within the vibrating tuning fork level sensor.

[0041] Figure 2An exemplary embodiment of the probe arrangement 200 is schematically illustrated, wherein a first vibrating tuning fork level sensor 102 is connected to a first pipe segment 208, and a second vibrating tuning fork level sensor 104 is connected to a second pipe segment 210 parallel to the first pipe segment 208. The first pipe segment 208 is longer than the second pipe segment 210, and the first pipe segment 208 includes a recess 212, wherein the second vibrating tuning fork level sensor 104 is at least partially disposed in the recess 212 of the first pipe segment 208. The recess 212 can be formed by making the cross-section of a portion of the pipe semi-circular instead of circular, but other configurations are also possible.

[0042] exist Figure 2 In the configuration shown, the overall diameter of the probe arrangement is reduced, and the overall diameter of the pipe and sensor, i.e., the "footprint," can be smaller than the diameter of the sensor body 112. Therefore, both the first vibrating tuning fork level sensor 102 and the second vibrating tuning fork level sensor 104 are arranged within the diameter of the sensor body 112. Furthermore, the connection 214 between the pipe 106 and the sensor body 112 can be centered to facilitate manufacturing, wherein the pipe 106 can be welded to the sensor body 112.

[0043] Figure 3 An example embodiment of the probe arrangement 300 is schematically shown, wherein the first vibrating tuning fork level sensor 102 and the second vibrating tuning fork level sensor 104 are arranged in parallel and on corresponding first pipe branches 302 and second pipe branches 304 of equal length. In an implementation where the probe arrangement 300 is arranged horizontally in the tank, the vertical distance between the first vibrating tuning fork level sensor 102 and the second vibrating tuning fork level sensor 104 can be carefully controlled by controlling the rotational alignment of the sensor body 112. In the example shown, the preferred alignment is predetermined during manufacturing, and the alignment mark 114 of the sensor body 112 ensures correct alignment during installation in the tank. As stated above regarding... Figure 2 The device can also be provided with a probe arrangement in which the pipe 106 is rotatable relative to the sensor body 112 and / or in which the sensors 102, 104 are rotatable relative to the corresponding pipe branches 302, 304. For the described vibrating tuning fork level sensor probe arrangement, the distance between the two sensors 102, 104 can be achieved with an accuracy of approximately ±1 mm to 2 mm.

[0044] Figure 4 The schematic diagram shows the horizontally mounted components in the side wall of tank 400. Figure 3The probe arrangement 300 is located in tank 400. The vertical distance between the two vibrating tuning fork level sensors 102, 104 can be carefully controlled by controlling the rotational alignment of the probe arrangement 300. Rotational alignment can be set at the factory, for example, during manufacturing, in which case alignment marks such as the notch 114 shown can be used during installation to ensure correct alignment. Probe arrangements can also be provided in which the rotational alignment of the sensors and / or sensor bodies can be controlled and adjusted during installation. Thus, each of the first sensor 102 and the second sensor 104 is controllably rotatable relative to the pipe 106, and the pipe 106 is controllably rotatable relative to the sensor body, thereby achieving relative rotational alignment of the respective first vibrating tuning fork level sensors 102 and second vibrating tuning fork level sensors 104.

[0045] Figure 5 An example embodiment of a vibrating tuning fork level sensor probe arrangement 500 is schematically shown, which has a first lower vibrating tuning fork level sensor 102, a second lower vibrating tuning fork level sensor 104, and a third upper vibrating tuning fork level sensor 502 attached to a third pipe section 504.

[0046] Figure 6 An example embodiment of a vibrating tuning fork level sensor probe arrangement 500 is schematically shown in a separation tank 602 for separating oil and water.

[0047] Figure 7 The typical behavior of a vibrating tuning fork when immersed in a fluid is schematically illustrated, where the x-axis represents the immersion depth in the fluid, and the y-axis represents the relative frequency drop as the vibrating tuning fork is immersed in the fluid. In the first section 702 of the graph, the tuning fork is in air, and this frequency can be referred to as the "dry frequency." In the second section 704 of the graph, the tuning fork is fully immersed in the liquid, and the frequency of the tuning fork can be referred to as the "wet frequency." For immersion in water, the wet frequency of the example implementation of the vibrating tuning fork level sensor is approximately 79% of the dry frequency. In the case of lighter fluids, the relative frequency drop is lower than that of using the same tuning fork with water. Gasoline, with a density of 730 kg / m³, is used as an example. 3 The wet frequency is approximately 81.3% of the dry frequency. Therefore, not only can the material level be detected, but the sensor described can also be used to determine which material is at the detected level.

[0048] Figure 7 The example behavior shown and described above is based on one configuration of a vibrating tuning fork. Changing the size and shape of the paddle section of the tuning fork will change the frequency drop in the corresponding medium. Therefore, the frequency drop can be changed between different media if desired.

[0049] The separator 602 has an inlet, a water outlet 606, an oil outlet 608, and a gas outlet 610. The interior of the separator 602 consists of at least a first chamber 612 and a second chamber 614 separated by a partition wall 616, wherein the partition wall extends only a portion of the height from the bottom of the separator 602. The separator 602 also includes, for example... Figure 5 The vibrating tuning fork level sensor probe arrangement 500 shown has a first lower vibrating tuning fork level sensor 102, a second lower vibrating tuning fork level sensor 104, and a third upper vibrating tuning fork level sensor 502.

[0050] During operation of the separator, the water-oil emulsion is supplied through inlet 604 to the first chamber 612, where the emulsion separates into its components. The lighter component (typically oil) then floats on top of the heavier component (typically water). The lighter component is then moved to the second chamber 614, while the level of the heavier component is controlled. Therefore, it is important to maintain control over the levels of the lighter component in the first chamber 612 to avoid the presence of a portion of the heavier component (i.e., water) in the second chamber 614, and to avoid the presence of a portion of the lighter component (i.e., oil) in the water at the water outlet 606. Trace amounts of the differential component may remain in their respective base components, but should be kept to a minimum and will be considered contamination.

[0051] The separation process is maintained by discharging heavier components from the first chamber from below through water outlet 606 and lighter components from above over partition wall 616. The probe arrangement according to the various embodiments described herein will help control the discharge from the first chamber 612 by using the frequency drop on two lower vibrating tuning fork sensors 102, 104 to indicate the density of the material for different components. The frequency drop of the respective tuning fork sensors can then be used to control the behavior of the switching pump and / or valves at water outlet 606 and oil outlet 608.

[0052] When both sensors 102 and 104 indicate a heavier component, the heavier fluid can be discharged from below. When the frequency of the upper vibration sensor 104 increases, it indicates the presence of a lighter component above the heavier component, and the discharge should stop to prevent some of the lighter component from being discharged along with the heavier component. The lighter component can also be a gas, such as a mixture of air and a gas derived from the lighter component.

[0053] In order to control the loading level of the first chamber 612 to prevent heavier components from being pushed into the second chamber 614, the vibrating tuning fork level sensor probe arrangement 500 includes a third vibrating tuning fork level sensor 502 with frequency recognition capability. The third vibrating tuning fork level sensor 502 is located in the upper part near the upper discharge point, that is, in the upper part near the partition wall 616.

[0054] The third vibrating tuning fork level sensor 502 will also help provide greater accuracy in determining the properties of lighter components detected by the upper tuning fork level sensor 502. When the third vibrating tuning fork level sensor 502 indicates a decrease in the frequency indicating a heavier fluid, it is necessary to increase the discharge from the oil outlet 608, or to restrict or close the inlet 604 so that a portion of the heavier component does not enter the second chamber 614.

[0055] Although the present invention has been described with reference to specific exemplary embodiments, many different changes, modifications, etc., will become apparent to those skilled in the art. Furthermore, it should be noted that parts of the system and method may be omitted, interchanged, or arranged in various ways, while the system and method still perform the functions of the present invention.

[0056] Furthermore, based on a study of the accompanying drawings, this disclosure, and the appended claims, variations of the disclosed embodiments can be understood and implemented by a person skilled in the art in practicing the claimed invention. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality. The fact that certain measures are recited in mutually different dependent claims does not indicate that combinations of these measures cannot be advantageously used.

Claims

1. A vibrating tuning fork level sensor probe arrangement (100) for a tank, comprising: First vibrating tuning fork level sensor (102); Second vibrating tuning fork level sensor (104); and The conduit (106) is configured to hold the first vibrating tuning fork level sensor in a first position and the second vibrating tuning fork level sensor in a second position at a predetermined distance from the first vibrating tuning fork level sensor, wherein the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor are configured to determine the position of the interface of the material in the tank.

2. The probe arrangement according to claim 1, wherein, The first vibrating tuning fork level sensor is arranged to operate at a first frequency, and the second vibrating tuning fork level sensor is arranged to operate at a second frequency different from the first frequency.

3. The probe arrangement according to any one of the preceding claims, wherein, The pipes form a uniform tubular channel.

4. The probe arrangement according to any one of the preceding claims, wherein, The pipeline is formed as a single piece.

5. The probe arrangement according to any one of the preceding claims, wherein, The pipe is a forked pipe, which includes a first branch (108) holding the first vibrating tuning fork level sensor and a second branch (110) holding the second vibrating tuning fork level sensor.

6. The probe arrangement according to any one of the preceding claims further includes a sensor body (112), said sensor body being configured to be disposed at the interface between the interior and exterior of the tank, wherein, The pipe is connected to the sensor body.

7. The probe arrangement according to claim 6, wherein, The sensor body has a first diameter, and both the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor are arranged within the first diameter.

8. The probe arrangement according to claim 6 or 7, wherein, The pipe is rotatably connected to the sensor body, thereby enabling the pipe to be rotated and adjusted relative to the sensor body.

9. The probe arrangement according to claim 8, wherein, The probe arrangement is configured to be installed horizontally in the tank, and wherein the conduit includes two parallel branches that hold the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor, such that the vertical distance between the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor can be controlled by rotating the conduit relative to the sensor body.

10. The probe arrangement according to claim 9, wherein, Each of the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor is rotatably connected to the pipe so that the corresponding first vibrating tuning fork level sensor and second vibrating tuning fork level sensor can be rotated and aligned relative to each other.

11. The probe arrangement according to any one of the preceding claims, wherein, The first vibrating tuning fork level sensor is configured to be positioned at a predetermined vertical distance from the second vibrating tuning fork level sensor when the probe is installed in the tank.

12. The probe arrangement according to any one of the preceding claims, wherein, The probe arrangement includes alignment marks (114) configured to define rotational alignment of the probe arrangement when the probe arrangement is horizontally arranged in the tank.

13. The probe arrangement according to any one of the preceding claims, wherein, The first vibrating tuning fork level sensor is connected to the first pipe section, and the second vibrating tuning fork level sensor is connected to a second pipe section parallel to the first pipe section, wherein: The first pipeline segment is longer than the second pipeline segment; The first pipe section includes a recessed portion; and The second vibrating tuning fork level sensor is at least partially arranged in the recessed portion of the first pipe section.

14. The probe arrangement according to any one of the preceding claims, wherein, Each of the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor is connected to the sensor control unit using a separate wiring.

15. The probe arrangement according to any one of the preceding claims further includes a control unit configured to individually control each of the first vibrating tuning fork level sensor and the second vibrating tuning fork level sensor.

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