Magnetic flow sensor

Abstract

One embodiment provides a method for measuring fluid flow using a magnetic flow sensor, comprising: introducing the magnetic flow sensor into a fluid, wherein the fluid has a flow path, wherein the magnetic flow sensor includes a coil and a metal field disruptor; positioning the magnetic flow sensor so that a distal end of the magnetic flow sensor is parallel to the flow path of the fluid; and measuring the flow rate of the fluid by measuring a voltage received from the magnetic flow sensor. Other aspects are described and claimed.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Patent Application Serial No. 62 / 962,602, filed on January 17, 2020, and entitled “MAGNETIC FLOW SENSOR,” the contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates generally to flow sensors and, more particularly, to magnetic flow sensors. Background Art

[0004] A magnetic flow sensor or magnetic flowmeter can measure fluid flow. Fluid flow can be measured using voltage. Voltage is induced by the fluid flowing through a magnetic field. A magnetic flowmeter operates through magnetic induction. A magnetic flowmeter operates when the fluid passing through the sensor is conductive. For example, a conductive fluid can be water containing ions. A magnetic flow sensor can be placed in a fluid containing a conductive liquid. For example, the sensor can be placed in a pipe carrying a conductive fluid. Summary of the Invention

[0005] In summary, one embodiment provides a method for measuring fluid flow using a magnetic flow sensor, comprising: introducing the magnetic flow sensor into a fluid, wherein the fluid has a flow path, wherein the magnetic flow sensor includes a coil and a metal field disrupter; positioning the magnetic flow sensor so that a distal end of the magnetic flow sensor is parallel to the flow path of the fluid; and measuring the flow rate of the fluid by measuring a voltage received from the magnetic flow sensor.

[0006] Another embodiment provides an apparatus for measuring fluid flow using a magnetic flow sensor, comprising: a processor; and a memory storing instructions executable by the processor to: introduce the magnetic flow sensor into a fluid, wherein the fluid has a flow path, wherein the magnetic flow sensor includes a coil and a metal field disruptor; position the magnetic flow sensor so that a distal end of the magnetic flow sensor is parallel to the flow path of the fluid; and measure the flow rate of the fluid by measuring a voltage received from the magnetic flow sensor.

[0007] Yet another embodiment provides a magnetic flow sensor comprising: a magnetic flow sensor, wherein the magnetic flow sensor comprises a closed-end tubular shape, wherein a coil is located in a distal end of the closed-end tubular shape; a coil, wherein the coil has a longitudinal axis and the longitudinal axis is orthogonal to the flow of the fluid; a metal field disruptor, wherein the metal field disruptor comprises a metal block located on each end of the longitudinal axis of the coil; wherein the magnetic flow sensor is used to measure the flow of the fluid in which the magnetic flow sensor is located by measuring a voltage generated by the magnetic flow sensor, wherein the voltage is generated by a magnetic field orthogonal to the flow path of the fluid, wherein the magnetic field is generated by a plurality of conductive particles in the fluid.

[0008] The foregoing is a summary and thus may contain simplifications, generalizations, and omissions of detail; consequently, those skilled in the art will appreciate that the summary is illustrative only and is not intended to be in any way limiting.

[0009] For a better understanding of the embodiments, and other and further features and advantages thereof, reference should be made to the following description taken in conjunction with the accompanying drawings.The scope of the invention will be pointed out in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An example embodiment of a magnetic flow sensor is illustrated.

[0011] Figure 2 An example embodiment of a distal end of a magnetic flow sensor is illustrated.

[0012] Figure 3 Another example embodiment of a distal end of a magnetic flow sensor is illustrated.

[0013] Figure 4 An example of a computer circuit is illustrated. DETAILED DESCRIPTION

[0014] It will be readily understood that, in addition to the described example embodiments, the components of the embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a variety of different configurations. Accordingly, the following more detailed description of the example embodiments as represented in the figures is not intended to limit the scope of the embodiments as claimed, but is merely representative of example embodiments.

[0015] Reference throughout this specification to "one embodiment" or "an embodiment" (or similar designations) means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" etc. in various places throughout this specification are not necessarily all referring to the same embodiment.

[0016] In addition, the described features, structures or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a thorough understanding of the embodiments. However, those skilled in the relevant art will recognize that various embodiments can be practiced without one or more specific details or using other methods, components, materials, etc. In other cases, well-known structures, materials or operations are not shown or described in detail. The following description is intended only by way of example and simply illustrates certain example embodiments.

[0017] Conventional methods and systems for magnetic or mechanical flow sensors can interfere with fluid flow. Because flow sensors can be used to determine flow, the sensors themselves can alter flow measurements. Traditional insertion flow sensors may involve placing the sensor in a non-parallel orientation relative to the flow path. This non-parallel orientation can disrupt flow. It can also disrupt flow at the point of measurement. The point of measurement can be the most critical point where flow can interfere with the sensor itself, which is used to measure flow.

[0018] Flow sensors can be used in many applications. For example, they can be placed in pipes transporting fluids. They can also be placed in the body of the fluid. Fluid flow monitoring can be used in industrial, agricultural, environmental, pharmaceutical, food, and residential settings. However, replacing and maintaining flow sensors can be challenging for facilities. For example, retrofitting new flow sensors into existing infrastructure can be difficult.

[0019] Traditional flow sensors can be produced in many designs. These designs may interfere with the flow of the fluid. The design of a flow sensor may require the force from the flowing fluid to affect a portion of the sensor, thus altering the flow of the fluid. For example, some flow sensors use propeller-shaped blades in the fluid flow. The propeller moves in response to the flow of the liquid, and the flow rate can then be determined from the propeller's motion. As another example, a flow sensor can be mechanical. A mechanical sensor may have a mechanism such as a plate at the end of a spring. The flow of the fluid can depress the plate, which compresses the spring, and the flow rate can be determined. As another example, a flow sensor can use differential pressure to measure flow. The differential pressure can measure the pressure difference between a pipe upstream and downstream of an orifice in the fluid flow. The differential pressure can determine the flow rate of the liquid. While these traditional flow sensors have useful applications, traditional methods disrupt the fluid flow to generate a pressure differential through physical components or orifices, both of which disrupt the fluid flow. What is needed is a flow sensor that can measure the flow rate of a fluid while the flow is as undisturbed as possible.

[0020] Therefore, one embodiment provides an apparatus and method for a magnetic flow sensor. Specifically, the magnetic flow sensor can be placed in a position that allows the sensor to measure unobstructed flow upstream of any supporting structure. This unobstructed position allows the sensor to be positioned to reduce or eliminate performance requirements related to linearity, accuracy, and the like. The magnetic flow sensor can be retrofitted into existing infrastructure. The magnetic flow sensor can include a clamp to hold the sensor in place. The magnetic flow sensor can be positioned so that the sensor body is parallel to the fluid flow. In other words, the sensor can be pointed toward the fluid flow. This orientation can result in less resistance or pressure loss compared to traditional sensor types. In one embodiment, the sensor can have an overall shape similar to a closed-end tubular structure. In one embodiment, the sensor can have a wafer shape. For example, the sensor can have a circular portion and a bisected portion. The sensor can include a coil. The coil can be located at the distal end of the sensor. The distal end can be the portion of the sensor located upstream of the flow. The coil can be perpendicular to the fluid flow. The coil can include metal blocks at each end of the coil's longitudinal axis. The metal blocks can modify the sensor's magnetic field. The sensor can have an output port. The sensor can generate a voltage. The voltage may be proportional to or a measure of the flow of the conductive fluid through the sensor and associated coil.

[0021] The illustrated example embodiments will be best understood by reference to the accompanying drawings.The following description is intended by way of example only and simply to illustrate certain example embodiments.

[0022] refer to Figure 1 , shows an example device for a magnetic flow sensor 100. The magnetic flow sensor can be positioned parallel to the flow so that the sensor measures flow in an unobstructed position within the flow. In one embodiment, the magnetic flow sensor measures flow using a coil to measure conductive particles in the fluid as the fluid passes through the coil. The magnetic flow sensor can generate a voltage that can be correlated to the fluid flow through the sensor.

[0023] The magnetic flow sensor may have an external portion 101. External portion 101 may be a signal converter. The external portion may be a portion of the magnetic flow sensor that can be positioned outside the flow or "wet" area. For example, the external portion may be located outside a pipe. The external portion may contain electronic circuitry, as discussed below. The external portion may have a communication port, wired connection, wireless communication, etc., for transmitting and receiving data, power, communications, commands, etc. to and from the magnetic flow sensor. The external portion may be constructed for harsh environments. For example, the external portion may be constructed of durable materials such as plastic or non-corrosive metal. The external portion may be sealed against liquids and able to withstand pressure from the flow measured by the sensor. The external portion may have sealed electrical connections and / or housing seals to protect against dust, liquids, sparks, etc. The external portion may have an access panel. The access panel may be hinged, latched, bolted, etc. for access and closure.

[0024] In one embodiment, a magnetic flow sensor may include a conduit 102. The conduit may be located between the outer portion 101 and the distal end of the magnetic flow sensor 103. The conduit 102 may position and support the magnetic flow sensor 103 and / or provide a conduit path from the magnetic flow sensor 103 to the outer portion 101. The distal end is described below and may be oriented so that the distal end is parallel to the fluid flow. The conduit may be constructed of a durable, non-corrosive, and / or liquid-tight material. The conduit may be metal, plastic, or the like. The conduit may be rigid to maintain the distal end's position within the fluid flow. The conduit may be hollow and contain one or more wires for data and / or communications. The conduit may have a curved shape. For example, the conduit may enter the pipe at a right angle relative to the pipe wall and bend 90 degrees so that the distal end faces the fluid flow. In other words, the distal end of the magnetic flow sensor faces upstream of the fluid flow and is parallel to the fluid flow path. This allows for accurate flow readings in an undisturbed fluid flow. Other configurations regarding bend angles and bend radii are possible. The illustrated conduit is an example embodiment. For example, the curvature of the catheter can be changed for tubes of different diameters.

[0025] In one embodiment, a magnetic flow sensor can be clamped to a pipe or other structure conveying a fluid flow. In one embodiment, the magnetic flow sensor can include a clamping plate 104 and one or more clamping U-bolts 105. The clamping plate can fit over the outer surface of the pipe. The clamping plate can cover and / or seal an orifice in the pipe. The seal between the clamping plate and the pipe can be a compression seal, welded, bonded, or otherwise sealed. A conduit can pass through the plate. The conduit can be welded, bonded, or otherwise sealed to the clamping plate.

[0026] One advantage of a magnetic flow sensor is that it can be retrofitted into existing infrastructure. Using the illustrated clamping plate, a small orifice can be made in the pipe, the distal end inserted into the pipe and turned toward upstream flow, and clamped in place. The magnetic flow sensor can be clamped in place using one or more U-bolts 105. The clamping plate and U-bolts can conform to the outer diameter of the pipe or other fluid container to maintain the position of the magnetic flow sensor. The design of the clamping plate and U-bolts may vary from that illustrated. For example, different configurations may be used for different pipe diameters, different environments, space requirements, etc.

[0027] refer to Figure 2 , an example embodiment of a magnetic flow sensor distal end 200 is shown. Figure 2 The remote 200 is Figure 1 Side view cross section of the middle element 103. Return Figure 2 The distal end 200 may include a coil 201. The coil may be a magnetic coil that generates magnetic field when charged particles of the fluid pass through it. The coil may have a longitudinal axis. The coil may be oriented within the distal end such that the longitudinal axis is orthogonal to the fluid flow. The distal end of the magnetic flow sensor may be positioned parallel to the fluid flow.

[0028] In one embodiment, a coil can detect the passage of conductive particles. The conductive particles can be in a fluid flowing through the coil. The magnetic flow sensor can measure a voltage or a change in voltage. The voltage can be caused by the conductive particles in the fluid flowing through the coil. This process can be described by Faraday's law. A magnetic field can be generated that is perpendicular to the flow of the fluid containing the conductive particles. In one embodiment, the voltage generated by the magnetic field acting on the conductive particles can be proportional to the velocity of the fluid flow. In one embodiment, the measured voltage can be correlated with the fluid velocity to measure the flow rate.

[0029] In one embodiment, the coil may have one or more metal field disruptors 202. The one or more metal field disruptors may be located at each end of the longitudinal axis of the coil. The one or more metal field disruptors may be a metal block. For example, the metal field disruptor may be a nut as shown. However, any block of conductive material may be used. The metal field disruptor may be a nut, a bolt head, a rivet, a forged or stamped metal piece, etc. In one embodiment, the metal field disruptor may disrupt the magnetic field generated by the conductive particles passing through the coil. This disruption may improve the sensitivity and / or accuracy of the magnetic flow sensor.

[0030] In one embodiment, the distal end of the magnetic flow sensor can have one or more fasteners 203. The fasteners can be screws, bolts, rivets, etc. The fasteners can secure the distal housing 204 to the internal components of the distal end. The fasteners can pass through the distal housing and be threaded or otherwise attached to the internal components in the distal end. The fasteners can also serve as electrical connections for components in the distal end.

[0031] The distal housing can be a fluid-tight and / or durable housing. The distal housing can be made of a material that will not degrade in the particular fluid in which the magnetic flow sensor is immersed. The distal housing can have a fitting portion 205. In one embodiment, the fitting portion secures the distal housing to the catheter. The fitting portion can be a threaded, compression fitting, etc. The fitting portion can be concave so that the fluid flows through the distal housing and the first portion of the catheter. The fitting portion can be sealed using tape, cement, glue, etc. The fitting portion can be sealed using a removable sealing material to allow repair or replacement of the distal housing and / or components within the distal housing. In one embodiment, a data and / or communication port or plug 206 can be located at the catheter end of the distal housing. This port can allow data and / or communication lines to be operably connected to components within the distal housing and allow these lines to travel through the catheter to an external portion.

[0032] refer to Figure 3 , shows an example embodiment of a magnetic flow sensor distal end 300. For example, Figure 3 An embodiment of this could be Figure 1 An alternative to the example embodiment shown. In other words, portions of the conduit can be shaped to accommodate different shapes of the distal end of the magnetic flow sensor. In one embodiment, a conduit may not be required because the distal portion of the magnetic flow sensor can be threaded or otherwise connected to the external portion. Return Figure 3 , the distal end may be referred to as a wafer shape. The overall shape of the distal end resembles a simple "steering wheel". The wafer shape may have a circular portion 301 and a bisected portion 302. Other shapes of distal ends or wafer shapes may be used and the examples shown represent example embodiments. The distal end of the wafer shape 303 faces the upstream flow of the fluid. In one embodiment, the distal end of the magnetic flow sensor is parallel to the flow path of the fluid. The wafer shape of the magnetic flow sensor may be implemented in a similar manner as described above. The fluid with the conductive particles generates a magnetic field as the fluid passes through the coil. The voltage or change in voltage may be measured and correlated to the velocity of the fluid.

[0033] The system and method can determine the appropriate volume, delivery rate, flow rate, etc. The system can have a flow sensor, a level sensor, a pressure sensor, or any sensor to determine the volume or flow rate of the fluid. Additionally or alternatively, the magnetic flow sensor can be calibrated. For example, the system can be programmed to deliver a certain volume of fluid given certain parameters (such as flow rate, voltage, pipe diameter, fluid viscosity, etc.). The parameters can include pipe diameter, fluid viscosity, pump speed, etc. The sensor can be located upstream, downstream, or inside the magnetic flow sensor. The sensor can provide feedback to the system, valves, and / or pumps to regulate the delivery of the fluid. The system can also monitor and measure the flow of multiple pipes and / or reservoirs that can deliver fluid.

[0034] The measurement of fluid delivery can be performed at periodic intervals set by the user or at a pre-programmed frequency in the device. The measurement of fluid delivery can be output on the device in the form of display, printing, storage, audio, tactile feedback, etc. Alternatively or additionally, the device can be connected via wired, wireless, fiber optic, The output can be sent to another device using near field communication or the like. One embodiment can use an alarm to warn of measurements or fluid delivery exceeding acceptable levels. One embodiment can use the system to shut down a pump or alter pumping during periods when parameters or thresholds are unacceptable. For example, the measurement device can use a relay coupled to an electrically actuated valve, pump, or the like.

[0035] If the fluid delivery falls outside acceptable parameters, the system can take corrective action. For example, the system can provide input to the system to increase speed, increase volume, increase pressure, etc. In one embodiment, the pump can be switched to a faster pumping state to increase pressure, flow, volume, etc. Additionally or alternatively, the system can take action to slow the flow of the fluid.

[0036] The system can output alarms, log events, and the like. Alarms can be in the form of audio, visual, data, storage of data to a storage device, output sent via a connection or wireless system, printouts, and the like. The system can record information such as measurement location, corrective action, geographic location, time, date, number of measurement cycles, flow rate, fluid volume, log of the type of fluid being delivered, voltage, and the like. Alarms or logs can be automated, meaning the system can automatically output whether corrections are needed. The system can also have associated alarms, limits, or predetermined thresholds. For example, if fluid delivery reaches or falls below a threshold or limit. Alarms or logs can be analyzed in real time, stored for later use, or any combination thereof.

[0037] Thus, the various embodiments described herein represent a technological improvement over conventional magnetic flow sensors. Using the techniques described herein, embodiments can employ methods and apparatus for magnetic flow sensors. This contrasts with conventional approaches that have the limitations described above. This technique provides a superior approach to constructing and operating magnetic flow sensors.

[0038] Although various other circuits, circuit systems, or components may be used in an information processing device, with respect to a magnetic flow sensor according to any of the various embodiments described herein, Figure 4 An example is shown in . The device circuit system 10′ may include a measurement system found on a chip design, for example, a specific computing platform (e.g., mobile computing, desktop computing, etc.). The software and (one or more) processors are combined in a single chip 11′. The processor includes an internal arithmetic unit, registers, cache memory, bus, I / O ports, etc., as is known in the art. The internal bus, etc. depends on the different vendors, but basically all peripheral devices (12′) can be connected to a single chip 11′. The circuit system 10′ combines the processor, memory control and I / O controller hub all into a single chip 11′. In addition, this type of system 10′ does not typically use SATA or PCI or LPC. For example, common interfaces include SDIO and I2C.

[0039] There are one or more power management chips 13', such as a battery management unit (BMU), which manages power supplied, for example, by a rechargeable battery 14', which can be recharged by connecting to a power source (not shown). In at least one design, a single chip (e.g., 11') is used to provide BIOS-like functions and DRAM memory.

[0040] The system 10' typically includes one or more of a WWAN transceiver 15' and a WLAN transceiver 16' for connecting to various networks, such as telecommunications networks and wireless Internet devices, such as access points. Furthermore, it typically includes devices 12', such as transmit and receive antennas, oscillators, PLLs, etc. The system 10' includes input / output devices 17' for data input and display / rendering (e.g., located at a computing location remote from the single-beam system and easily accessible to users). The system 10' also typically includes various storage devices, such as flash memory 18' and SDRAM 19'.

[0041] As will be appreciated from the foregoing, the electronic components of one or more systems or devices may include, but are not limited to, at least one processing unit, memory, and a communication bus or communication device that couples various components including the memory to the one or more processing units. The system or device may include or have access to various device-readable media. The system memory may include device-readable storage media in the form of volatile and / or non-volatile memory, such as read-only memory (ROM) and / or random access memory (RAM). By way of example and not limitation, the system memory may also include an operating system, application programs, other program modules, and program data. The disclosed system may be used in embodiments of a magnetic flow sensor.

[0042] As will be appreciated by those skilled in the art, various aspects may be embodied as systems, methods, or device program products. Thus, various aspects may take the form of entirely hardware embodiments or embodiments including software, which are collectively referred to herein as "circuits," "modules," or "systems." Furthermore, various aspects may take the form of device program products embodied in one or more device-readable media, wherein device-readable program code is implemented together with the one or more device-readable media.

[0043] It should be noted that various functions described herein may be implemented using instructions stored on a device-readable storage medium, such as a non-signal storage device, where the instructions are executed by a processor. In the context of this document, a storage device is not a signal, and "non-transitory" includes all media except signal media.

[0044] The program code for performing the operation can be written in any combination of one or more programming languages. The program code can be executed entirely on a single device, partially on a single device, as a stand-alone software package, partially on a single device and partially on another device, or entirely on another device. In some cases, the device can be connected by any type of connection or network (including a local area network (LAN) or a wide area network (WAN)), or can be connected by other devices (for example, using an internet service provider through the internet), by wireless connection (such as near field communication) or by hard wire connection (for example, by USB connection).

[0045] Example embodiments are described herein with reference to the accompanying drawings, which illustrate example methods, devices, and products according to various example embodiments. It should be understood that actions and functions may be implemented, at least in part, by program instructions. These program instructions may be provided to a processor of a device (e.g., a handheld measurement device) or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the device implement the specified functions / behaviors.

[0046] It should be noted that the values ​​provided herein should be interpreted to include equivalent values ​​indicated using the term "about." Equivalent values ​​will be apparent to one of ordinary skill in the art, but at least include values ​​obtained by ordinary rounding to the last significant digit.

[0047] The present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limiting. Many modifications and variations will be apparent to those skilled in the art. The exemplary embodiments are chosen and described in order to explain the principles and practical applications, and to enable others skilled in the art to understand the disclosure of various embodiments with various modifications as are suitable for the particular use contemplated.

[0048] Thus, although illustrative example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the description is not limiting and that various other changes and modifications may be made therein by those skilled in the art without departing from the scope or spirit of the present disclosure.

Claims

1. A method for measuring the flow rate of a fluid using a magnetic flow sensor, comprising: introducing a magnetic flow sensor into a fluid, wherein the fluid has a flow path, wherein the magnetic flow sensor includes a coil and a metal field disruptor; positioning the magnetic flow sensor so that a distal end of the magnetic flow sensor is parallel to the flow path of the fluid; and measuring the flow rate of the fluid by measuring the voltage received from the magnetic flow sensor, Wherein, the coil has a longitudinal axis and the longitudinal axis is orthogonal to the flow of the fluid.

2. The method according to claim 1, wherein The distal end of the magnetic flow sensor is positioned in unobstructed flow upstream of the support structure.

3. The method according to claim 1, wherein The magnetic flow sensor includes a closed-end tubular shape, wherein the coil is located in a distal end of the closed-end tubular shape.

4. The method according to claim 1, wherein The magnetic flow sensor includes a clamping unit.

5. The method according to claim 1, wherein The metal field disruptor includes a metal block on each end of the longitudinal axis of the coil.

6. The method according to claim 1, wherein The voltage is proportional to the velocity of the fluid.

7. The method according to claim 1, wherein The voltage is generated by a magnetic field orthogonal to a flow path of the fluid, wherein the magnetic field is generated by a plurality of conductive particles in the fluid.

8. A device for measuring the flow rate of a fluid using a magnetic flow sensor, comprising: processor; and a memory storing instructions executable by the processor to: introducing a magnetic flow sensor into a fluid, wherein the fluid has a flow path, wherein the magnetic flow sensor includes a coil and a metal field disruptor; positioning the magnetic flow sensor so that a distal end of the magnetic flow sensor is parallel to the flow path of the fluid; and measuring the flow rate of the fluid by measuring the voltage received from the magnetic flow sensor, The coil has a longitudinal axis, and the longitudinal axis is orthogonal to the flow of the fluid.

9. The device according to claim 8, wherein The distal end of the magnetic flow sensor is positioned in unobstructed flow upstream of the support structure.

10. The device according to claim 8, wherein The magnetic flow sensor includes a closed-end tubular shape, wherein the coil is located in a distal end of the closed-end tubular shape.

11. The device according to claim 8, wherein The magnetic flow sensor includes a clamping unit.

12. The device according to claim 8, wherein The metal field disruptor includes a metal block on each end of the longitudinal axis of the coil.

13. The device according to claim 8, wherein The voltage is proportional to the velocity of the fluid.

14. A magnetic flow sensor comprising: a coil, wherein the coil has a longitudinal axis and the longitudinal axis is orthogonal to the flow of the fluid; a magnetic flow sensor, wherein the magnetic flow sensor comprises a closed-end tubular shape, wherein the coil is located in a distal end of the closed-end tubular shape; a metal field disruptor, wherein the metal field disruptor comprises a metal block on each end of the longitudinal axis of the coil; The magnetic flow sensor is configured to measure the flow of a fluid in which the magnetic flow sensor is located by measuring a voltage generated by the magnetic flow sensor, wherein the voltage is generated by a magnetic field orthogonal to a flow path of the fluid, wherein the magnetic field is generated by a plurality of conductive particles in the fluid.

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