Magnetic sensor assembly for rotary gas meters

Abstract

A magnetic sensor assembly for rotary gas meters includes a counter module electronic volume corrector (“EVC”). In one aspect, the assembly includes a magnetic sensor probe configured to be releasably secured within an aperture of a first gas meter body. The sensor probe may alternatively be positioned within an adapter sleeve. The adapter sleeve is configured to be releasably secured within an aperture of a second gas meter body. In another aspect, the counter module EVC includes a base coupling member, and the assembly includes first and second magnetic sensor probes, the probe being configured to be releasably secured within apertures of first and second gas meter bodies, respectively. Each probe has a probe coupling member that is releasably engagable with the base coupling member.

Claims

1. An auxiliary sensor probe for coupling between a counter module electronic volume corrector (EVC) and a gas meter body for sensing rotation of a counter drive shaft of the gas meter body, the probe comprising: a housing having an outer profile; a first end bearing a coupling member for operable connection to the EVC; and a second end insertable into an aperture on the gas meter body; wherein the outer profile provides a complementary shape and size for friction fitting the probe within the aperture; and wherein the outer profile is provided by an adapter sleeve.

2. The probe of claim 1, wherein at least a portion of the housing is cylindrical.

3. The probe of claim 1, wherein the outer profile includes an engagement protrusion.

4. The probe of claim 1, wherein the outer profile includes an alignment protrusion.

5. The probe of claim 4, wherein the alignment protrusion is shaped and sized to be received in an alignment recess in the aperture.

6. The probe of claim 1, wherein at least a portion of the outer profile is tapered.

7. The probe of claim 1, wherein the coupling member allows for direct rigid connection with the EVC.

8. The probe of claim 1, wherein the coupling member connects to a flexible wire cable connected to the EVC.

9. The probe of claim 1, wherein the coupling member includes a male or female end releasably connectable with a complementary male or female end on a base connector connected to the EVC.

10. The probe of claim 1, wherein the probe is magnetically coupled with at least a portion of the gas meter body.

11. The probe of claim 1, wherein the probe senses rotation by magnetically detecting passage of an impeller in the gas meter body.

12. The probe of claim 11, further comprising at least one Wiegand sensor.

13. A counter module electronic volume corrector (EVC) for coupling with a gas meter body for sensing rotation of a counter drive shaft of the gas meter body, the counter module EVC comprising: an EVC body; a sensor probe comprising: a housing with an outer profile; a first end bearing a coupling member for connecting to a mounting surface of the EVC body; and a second end insertable into an aperture accessible from a mounting surface of a gas meter body; wherein the outer profile provides a complementary shape and size for friction fitting within the aperture; and wherein the outer profile is provided by an adapter sleeve.

14. The counter module EVC of claim 13, wherein the shape and size permit insertion of the probe to a depth such that the respective mounting surfaces of the EVC body and the gas meter body are securable together while the probe is inserted.

15. The counter module EVC of claim 13, wherein the sensor probe is magnetically coupled with at least a portion of the gas meter body.

16. The counter module EVC of claim 13, wherein the sensor probe senses rotation by magnetically detecting passage of an impeller in the gas meter body.

17. The counter module EVC of claim 16, further comprising at least one Wiegand sensor.

18. A counter module electronic volume corrector (EVC) kit for coupling to one of a first gas meter body and a second gas meter body for sensing rotation of a respective counter drive shaft of the first gas meter body and the second gas meter body, the kit comprising: an EVC body; a sensor probe comprising: a probe outer profile; a first end bearing a coupling member for operable connection to the EVC; and a second end for selective insertion; and an adapter sleeve comprising: a sleeve outer profile; and a sleeve aperture to selectively receive the sensor probe via the second end; and wherein: the probe outer profile provides a complementary shape and size for friction fitting the sensor probe within an aperture of the first gas meter body; and the sleeve outer profile provides a complementary shape and size for friction fitting the sensor probe within an aperture of the second gas meter body when the sensor probe is within the sleeve aperture.

19. The kit of claim 18, wherein the probe outer profile comprises a plurality of engagement protrusions to engage the sensor probe, when selectively inserted, in the aperture of the first gas meter body or the sleeve aperture.

20. The kit of claim 18, wherein the probe outer profile comprises an alignment protrusion to align the sensor probe, when selectively inserted, in the aperture of the first gas meter body or the sleeve aperture.

21. The kit of claim 20, wherein the sleeve comprises an inner profile providing an alignment recess to receive the alignment protrusion.

22. The kit of claim 18, wherein the probe outer profile is cylindrical and the sleeve outer profile has a tapered.

23. The kit of claim 18, wherein the first gas meter body is manufactured by a first manufacturer and the second gas meter body is manufactured by a second manufacturer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) For a better understanding of the described embodiments and to show more clearly how they may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:

(2) FIGS. 1A and 1B are perspective views of a first gas meter body and a second gas meter body;

(3) FIG. 2 is a perspective view of a counter module EVC and the first gas meter body of FIG. 1A;

(4) FIG. 3 is a perspective view of the counter module EVC of FIG. 2 and an adapter sleeve;

(5) FIG. 4 is a perspective view of the counter module EVC and adapter sleeve of FIG. 3, with a magnetic sensor probe of the counter module EVC positioned within the adapter sleeve;

(6) FIG. 5 is a perspective view of the counter module EVC and adapter sleeve of FIG. 4 and the second gas meter body of FIG. 1B;

(7) FIG. 6 is a perspective view of a magnetic sensor probe housing, in accordance with one embodiment;

(8) FIG. 7 is an end view of the magnetic sensor probe housing of FIG. 6;

(9) FIG. 8 is a longitudinal section view of the magnetic sensor probe housing of FIG. 6, taken along line 8-8 in FIG. 7;

(10) FIG. 9 is a perspective view of a magnetic sensor probe housing, in accordance with another embodiment;

(11) FIG. 10 is an end view of the magnetic sensor probe housing of FIG. 9;

(12) FIG. 11 is a longitudinal section view of the magnetic sensor probe housing of FIG. 9, taken along line 11-11 in FIG. 10;

(13) FIG. 12 is a perspective view of an adapter sleeve, in accordance with one embodiment;

(14) FIG. 13 is an end view of the adapter sleeve of FIG. 12;

(15) FIG. 14 is a longitudinal section view of the adapter sleeve of FIG. 12, taken along line 14-14 in FIG. 13;

(16) FIG. 15 is a perspective view of a counter module EVC in accordance with another embodiment;

(17) FIG. 16 is a perspective view of the counter module EVC of FIG. 15 and an adapter sleeve;

(18) FIG. 17 is a perspective view of the counter module EVC and adapter sleeve of FIG. 16, with a magnetic sensor probe of the counter module EVC positioned within the adapter sleeve;

(19) FIG. 18 is a perspective view of an counter module EVC in accordance with another embodiment, a first magnetic sensor probe, and a second magnetic sensor probe;

(20) FIG. 19 is a perspective view of the counter module EVC and the first magnetic sensor probe of FIG. 18;

(21) FIG. 20 is a perspective view of the counter module EVC and sensor probe of FIG. 19, with the magnetic sensor probe coupled to the counter module EVC;

(22) FIG. 21 is a perspective view of the counter module EVC and the second magnetic sensor probe of FIG. 18;

(23) FIG. 22 is a perspective view of the counter module EVC and sensor probe of FIG. 21, with the magnetic sensor probe coupled to the counter module EVC;

(24) FIG. 23 is a perspective view of the first magnetic sensor probe of FIG. 18;

(25) FIG. 24 is an end view of the sensor probe of FIG. 23;

(26) FIG. 25 is a side view of the sensor probe of FIG. 23;

(27) FIG. 26 is a perspective view of the second magnetic sensor probe of FIG. 18;

(28) FIG. 27 is an end view of the sensor probe of FIG. 26; and

(29) FIG. 28 is a side view of the sensor probe of FIG. 26;

(30) The drawings included herewith are for illustrating various examples of articles, methods, and apparatuses of the teaching of the present specification and are not intended to limit the scope of what is taught in any way.

DESCRIPTION OF EXAMPLE EMBODIMENTS

(31) Various apparatuses, methods and compositions are described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover apparatuses and methods that differ from those described below. The claimed inventions are not limited to apparatuses, methods and compositions having all of the features of any one apparatus, method or composition described below or to features common to multiple or all of the apparatuses, methods or compositions described below. It is possible that an apparatus, method or composition described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus, method or composition described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicant(s), inventor(s) and/or owner(s) do not intend to abandon, disclaim, or dedicate to the public any such invention by its disclosure in this document.

(32) While the apparatus and methods disclosed herein are described specifically in relation to conventional positive displacement rotary gas meters, it will be appreciated that the apparatus and methods may alternatively be used with other types of gas meters.

(33) FIGS. 1A and 1B illustrate two examples of positive displacement rotary gas meter bodies. Gas meter body 10A has an aperture 16A for providing access to a counter drive shaft of the gas meter, and an aperture 14A for receiving a temperature probe. As used herein, a counter drive shaft is any shaft of the gas meter body that rotates proportionally to the rotation of the impellers (e.g. lobed figure-eight impellers, or other rotors) and may be used to drive a counter module EVC. For example, a rotor shaft may be used as a counter drive shaft. Gas meter body 10A also has a mounting surface 12A to which a counter module EVC may be secured.

(34) FIG. 2 illustrates a counter module EVC 20 and a gas meter body 10A. Counter module EVC 20 has a magnetic sensor probe 30 that may be positioned within aperture 16A of gas meter body 10A for sensing the rotation of the counter drive shaft. For example, a Wiegand magnet and corresponding magnet sensor may be used, although any suitable tracking system may alternatively be used.

(35) A display 24 may be provided on counter module EVC 20 for outputting the measured amount of gas that has traveled through the gas meter. Counter module EVC 20 may also have a temperature probe (not shown) for insertion into aperture 14A, allowing counter module EVC 20 to provide a temperature-corrected measurement of the volume of gas that has flowed through the gas meter, as is conventionally known.

(36) For example, counter module EVC 20 may be an AdEM™ series counter module EVC as available from Romet Limited.

(37) As illustrated in FIG. 2, magnetic sensor probe 30 is coupled to the body 21 of counter module EVC 20 using a length of flexible cabling 23. It is understood that the body 21 houses and supports EVC components (not shown) within the body 21 and the cabling 23 couples the magnetic sensor probe 30 thereto. This arrangement allows sensor probe 30 to be easily moved relative to the mounting surface 22 of counter module EVC 20 (limited by the length of the cable 23). An advantage of this arrangement is that counter module EVC 20 may be used with gas meter bodies having different relative locations of their common mounting surface and counter drive shafts (as the magnetic sensor probe 30 may be easily repositioned relative to the mounting surface 22). For example, after positioning sensor probe 30 within aperture 16A of gas meter body 10A, counter module EVC 20 may be coupled directly to gas meter body 10A (e.g. by securing mounting surface 22 of counter module EVC 20 to mounting surface 12A).

(38) While counter module EVC 20 may be used with gas meter bodies having different relative locations of their common mounting surface and counter drive shafts, magnetic sensor probe 30 may not be compatible with all gas meter bodies. For example, different gas meter bodies (e.g. different rates sized of gas meter bodies, and/or different model lines produced by a manufacturer of gas meter bodies) may have differing sizes of apertures 16 for receiving magnetic sensor probes. Additionally, or alternatively, different gas meter bodies may have apertures 16 with different internal profiles.

(39) Typically, the magnetic sensor probe of a counter module EVC is ‘hard wired’ to the counter module EVC, and it may be difficult and/or inadvisable to modify and/or replace the sensor probe. For example, cutting off and re-wiring a new sensor probe to the counter module EVC may void a warranty provided by the manufacturer of the counter module EVC. Additionally, or alternatively, improper re-wiring of a new sensor probe to a counter module EVC may impact the metrological validity of the counter module EVC.

(40) FIGS. 3 and 4 illustrate a magnetic sensor assembly, referred to generally as 100, that may be compatible with a greater variety of different gas meter bodies. As shown in FIG. 3, assembly 100 includes a counter module EVC 20, magnetic sensor probe 30, and at least one adapter sleeve 40.

(41) Each adapter sleeve 40 includes a sensor probe aperture 44 configured to receive the sensor probe 30 within the adapter sleeve. When sensor probe 30 is positioned within adapter sleeve 40 (e.g. as illustrated in FIG. 4), the outer surface of the adapter sleeve 40 becomes the effective outer surface of the sensor probe 30.

(42) As illustrated in FIG. 5, with the sensor probe 30 positioned within an adapter sleeve 40, the adapter sleeve 40 may be positioned within an aperture 16B of second gas meter body 10B, and the counter module EVC 20 may be coupled to the second gas meter body 10B (e.g. by securing mounting surface 22 of counter module EVC 20 to mounting surface 12B).

(43) Alternatively, as illustrated in FIG. 2, the counter module EVC 20 may be coupled to the first gas meter body 10A (e.g. by securing mounting surface 22 of counter module EVC 20 to mounting surface 12A) with the sensor probe 30 positioned within aperture 16A of first gas meter body 10A (i.e. without adapter sleeve 40).

(44) Optionally, sensor probe aperture 44 may be configured to provide a ‘friction’ fit, allowing sensor probe 30 to be releasably secured within sensor probe aperture 44 manually, and preferably without the use of tools.

(45) The ability to use the same magnetic sensor assembly 100 with gas meter bodies 10 having different sizes, positions, and/or internal profiles of magnetic sensor apertures 16 may have one or more advantages.

(46) For example, the ability to use a ‘universal’ magnetic sensor assembly 100 with multiple gas meter bodies may reduce the number of different counter module EVCs that are required to be brought to a customer's facility when installing and/or repairing counter module EVCs, as the same parts may be used with a wide variety of gas meters.

(47) For example, a facility may have a number of gas meter bodies that are part of a first model line of meter bodies produced by a first manufacturer, and the same facility may also have gas meter bodies that are produced by a second manufacturer. A service technician dispatched to the facility may not have an accurate count of the number of different types of gas meter bodies present at the facility, and/or may not know how many gas meter bodies of each type(s) require service and/or repair. Accordingly, the technician may be required to bring a number of different counter module EVCs, and/or may require multiple trips to the facility (e.g. one trip to count the number of different meter bodies and/or meter body type(s), and a second trip to bring the correct amount of compatible counter module EVCs.)

(48) FIGS. 6-8 illustrate an example of a housing of a magnetic sensor probe 30. Housing 39A has a first end 31, a second end 32, a generally cylindrical outer surface 33 extending between the first and second ends 31, 32 of the housing, and a longitudinal axis 35. One or more magnetic sensing devices (not shown) are provided within an aperture 34 of the housing 39A.

(49) Optionally, as illustrated in FIG. 6, the outer surface 33 of housing 39A (and thus, the outer surface of magnetic sensor probe 30) may have one or more engagement protrusions 36. Preferably, the engagement protrusions 36 are configured to assist in securing magnetic sensor probe 30 within a sensor probe aperture 44 of an adapter sleeve 40, and/or within an aperture 16 of a gas meter body 10. Additionally, or alternatively, the outer surface 33 of housing 39A (and thus, the outer surface of magnetic sensor probe 30) may have one or more alignment protrusions. Preferably, the alignment protrusions are configured to assist in aligning magnetic sensor probe 30 within a sensor probe aperture 44 of an adapter sleeve 40, and/or within an aperture 16 of a gas meter body 10. In some embodiments, engagement protrusions 36 may also function as alignment protrusions.

(50) Magnetic sensor probe 30 and its housing 39A may have any suitable dimensions. For example, outer surface 33 of housing 39A may have a diameter d.sub.1 of about 0.50 inches or about 1.27 centimeters, and a length between the first and second ends 31, 32 of about 1.4 inches or about 3.56 centimeters.

(51) For example, magnetic sensor probe 30 may be configured to be inserted into an aperture provided on a B3 series gas meter body as available from Dresser GE Oil & Gas.

(52) FIGS. 9-11 illustrate another example of a housing of a magnetic sensor probe 30. Housing 39B has a first end 31, a second end 32, and an outer surface 33 extending between the first and second ends 31, 32 of the housing, and a longitudinal axis 35. One or more magnetic sensing devices (not shown) are provided within an aperture 34 of the housing 39A.

(53) As illustrated in FIG. 11, the first end 31 of housing 39B may have a diameter d.sub.1 that is greater than a diameter d.sub.2 of the second end 32 of housing 39B. Thus, housing 39B may allow magnetic sensor probe 30 (positioned within adapter sleeve 40) to be secured within an aperture 16 (of a gas meter body 10) that has a tapered profile.

(54) Magnetic sensor probe 30 and its housing 39B may have any suitable dimensions. For example, diameter d.sub.1 of first end 31 may be about 1.00 inches or about 2.54 centimeters, and a length between the first and second ends 31, 32 of about 1.5 inches or about 3.81 centimeters.

(55) FIGS. 12-14 illustrate an example of an adapter sleeve 40. In the illustrated example, adapter sleeve 40 has a first end 41, a second end 42, and an outer surface 43 extending between the first and second ends 41, 42 of the adapter sleeve. Adapter sleeve 40 also has a sensor probe aperture 44 configured to releasably receive sensor probe 30 within the adapter sleeve. In the illustrated example, sensor probe aperture 44 extends from the first end 41 towards the second end 42 of the adapter sleeve 40.

(56) In the illustrated example, adapter sleeve 40 has a longitudinal axis 45, and sensor probe aperture 44 has a longitudinal axis 47 that is offset from the longitudinal axis 45 of the adapter sleeve 40. Such an arrangement may allow a magnetic sensor probe 30 (and its magnetic sensing devices) to be positioned non-centrally within the adapter sleeve 40, and ultimately allowing the sensor probe to be secured non-centrally within an aperture 16 of a gas meter body 10.

(57) In one or more alternative embodiments (not shown), longitudinal axis 47 of sensor probe aperture 44 may be at an angle to longitudinal axis 45 of the adapter sleeve 40.

(58) In one or more alternative embodiments (not shown), the inner surface of sensor probe aperture 44 may be provided with one or more alignment recesses (not shown) for receiving one or more alignment protrusions provided on an outer surface of magnetic sensor probe 30 as magnetic sensor probe 30 is inserted into sensor probe aperture 44. In such an arrangement, when the sensor probe is positioned within the adapter sleeve, the alignment protrusions and the alignment recesses may cooperatively inhibit the adapter sleeve 40 from rotating relative to the sensor probe 30. Additionally, or alternatively, the alignment protrusions and the alignment recesses may cooperatively inhibit the sensor probe from being inserted into the adapter sleeve unless the alignment protrusions and the alignment grooves are aligned.

(59) As illustrated in FIG. 14, the first end 41 of adapter sleeve 40 may have a diameter d.sub.1 that is greater than a diameter d.sub.2 of the second end 42 of adapter sleeve 40. Thus, using adapter sleeve 40 may allow a magnetic sensor probe 30 (positioned within adapter sleeve 40) that has a generally cylindrical profile to be secured within an aperture 16 (of a gas meter body 10) that has a tapered profile.

(60) Adapter sleeve 40 may have any suitable dimensions. For example, outer surface 43 may have a diameter d.sub.1 of about 1.00 inches or about 2.54 centimeters, and a length between the first and second ends 41, 42 of about 1.5 inches or about 3.81 centimeters.

(61) For example, adapter sleeve 40 may be configured to be inserted into an aperture provided on a RM series and/or RMT series gas meter body as available from Romet Limited. It will be appreciated that an adapter sleeve configured for one type of gas meter body may also be compatible with another type of gas meter body. For example, an adapter sleeve 40 configured to be inserted into an aperture provided on an RM and/or RMT gas meter body as available from Romet Limited may also be capable of being inserted into an aperture provided on a LMMA series gas meter body as available from Dresser GE Oil & Gas.

(62) Adapter sleeve 40 and magnetic sensor housings 39A, 39B may be made from any suitable material. For example, they may be made from plastic, such as low-density polyethylene (LDPE). In some embodiments, adapter sleeve 40 may be made from the same material as housing 39.

(63) In the examples illustrated in FIGS. 2-5, a magnetic sensor probe is coupled to a counter module EVC using a length of flexible cabling. Alternatively, a magnetic sensor probe may be rigidly coupled to a counter module EVC. FIG. 15 illustrates an example of a counter module EVC 20 with a magnetic sensor probe 30 rigidly coupled to the body 21 of the counter module EVC 20. In this arrangement, sensor probe 30 is in a fixed location relative to the mounting surface 22 of counter module EVC 20. As illustrated in FIGS. 16 and 17, when sensor probe 30 is positioned within adapter sleeve 40 (e.g. as illustrated in FIG. 17), the outer surface of the adapter sleeve 40 becomes the effective outer surface of the sensor probe 30.

(64) FIG. 18 illustrates another embodiment of a magnetic sensor assembly, referred to generally as 200, that may also be compatible with a greater variety of different gas meter bodies. As shown in FIG. 18, assembly 200 includes a counter module EVC 20, a base coupling member 50, a first magnetic sensor probe 60A, and a second magnetic sensor probe 60B.

(65) In the illustrated example, base coupling member 50 is attached to the counter module EVC 20 using a length of flexible cabling 53. In alternative embodiments, coupling member 50 may be rigidly coupled to counter module EVC 20.

(66) Each sensor probe 60A, 60B includes a probe coupling member 55 that is releasably engagable with the base coupling member 50 of the counter module EVC 20. Preferably, the base coupling member 50 and the probe coupling members 55 are configured to allow coupling member 50 to be secured to a coupling member 55 without the use of tools.

(67) Preferably, when coupling member 50 and a coupling member 55 are secured to each other the resulting connection inhibits or prevents dust and/or water from interfering with the electrical connection between the counter module EVC and the magnetic sensor probe. For example, the mated coupling members may have an Ingress Protection rating of at least IP65, as defined in international standard EN 60529 (British BS EN 60529:1992, European IEC 60509:1989).

(68) In the illustrated examples, coupling member 50 is a female connector and coupling members 55 are male connectors. It will be appreciated that, in alternative embodiments, coupling member 50 may be a male connector and coupling members 55 may be female connectors.

(69) As illustrated in FIGS. 19 and 20, in a first configuration the base coupling member 50 may be engaged with the first magnetic sensor probe 60A to operatively couple the first sensor probe and the counter module EVC. In this configuration, the first magnetic sensor probe 60A may be positioned within an aperture 16A of first gas meter body 10A, and the counter module EVC 20 may be coupled to the first gas meter body 10A (e.g. by securing mounting surface 22 of counter module EVC 20 to mounting surface 12A).

(70) Alternatively, as illustrated in FIGS. 21 and 22, in another configuration the base coupling member 50 may be engaged with the second magnetic sensor probe 60B to operatively couple the second sensor probe and the counter module EVC. In this configuration, the second magnetic sensor probe 60B may be positioned within an aperture 16B of second gas meter body 10B, and the counter module EVC 20 may be coupled to the second gas meter body 10B (e.g. by securing mounting surface 22 of counter module EVC 20 to mounting surface 12B).

(71) As discussed above with respect to magnetic sensor assembly 100, the ability to use the same magnetic sensor assembly 200 with gas meter bodies 10 having different sizes, positions, and/or internal profiles of magnetic sensor apertures 16 may have one or more advantages.

(72) FIGS. 23-25 illustrate an example of a magnetic sensor probe 60A. In the illustrated example, sensor probe 60A has a first end 61, a second end 62, and an outer surface 63 extending between the first and second ends 61, 62 of the sensor probe. Sensor probe 60A also includes a probe coupling member 55 extending from the first end 61 of the first sensor probe.

(73) In the illustrated example, coupling member 55 is attached to the sensor probe 60A using a length of flexible cabling 57. In alternative embodiments, coupling member 55 may be rigidly coupled to sensor probe 60A.

(74) Optionally, as illustrated in FIGS. 23 and 25, the outer surface 63 of sensor probe 60A may have one or more engagement protrusions 66. Preferably, the engagement protrusions 66 are configured to assist in securing sensor probe 60A within an aperture 16A of a gas meter body 10A.

(75) FIGS. 26-28 illustrate an example of a second magnetic sensor probe 60B. In the illustrated example, sensor probe 60B has a first end 61, a second end 62, and an outer surface 63 extending between the first and second ends 61, 62 of the sensor probe. Sensor probe 60B also includes a probe coupling member 55 extending from the first end 61 of the second sensor probe.

(76) In the illustrated example, coupling member 55 is attached to the sensor probe 60B using a length of flexible cabling 57. In alternative embodiments, coupling member 55 may be rigidly coupled to sensor probe 60B.

(77) Optionally, as illustrated in FIGS. 26 and 28, the outer surface 63 of sensor probe 60B may have one or more engagement protrusions 66. Preferably, the engagement protrusions 66 are configured to assist in securing sensor probe 60B within an aperture 16B of a gas meter body 10B.

(78) As illustrated in FIG. 28, the first end 61 of sensor probe 60B may have a diameter d.sub.1 that is greater than a diameter d.sub.2 of the second end 62 of sensor probe 60B. Thus, using sensor probe 60B may allow counter module EVC 20 to be used with a gas meter body 10 that has an aperture 16 with a tapered profile.

(79) The outer surfaces of sensor probes 60A, 60B may be made from any suitable material. For example, they may be made from plastic, such as low-density polyethylene (LDPE).

(80) For assemblies 100 and 200, it will be appreciated that counter module EVC 20 may need to be programmed (or reprogrammed) based on the gas meter body to which it is coupled. For example, counter module EVC may include two or more sets of sensor configuration data stored in e.g. firmware, and an appropriate set of configuration data may be selected based on the gas meter body in which the magnetic sensor probe (e.g., probe 30, 60A, 60B) is positioned.

(81) As used herein, the wording “and/or” is intended to represent an inclusive—or. That is, “X and/or Y” is intended to mean X or Y or both, for example. As a further example, “X, Y, and/or Z” is intended to mean X or Y or Z or any combination thereof.

(82) While the above description describes features of example embodiments, it will be appreciated that some features and/or functions of the described embodiments are susceptible to modification without departing from the spirit and principles of operation of the described embodiments. For example, the various characteristics which are described by means of the represented embodiments or examples may be selectively combined with each other. Accordingly, what has been described above is intended to be illustrative of the claimed concept and non-limiting. It will be understood by persons skilled in the art that other variants and modifications may be made without departing from the scope of the invention as defined in the claims appended hereto. The scope of the claims should not be limited by the preferred embodiments and examples, but should be given the broadest interpretation consistent with the description as a whole.

(83) Practical implementation may include any or all of the features described herein. These and other aspects, features and various combinations may be expressed as methods, apparatus, systems, means for performing functions, program products, and in other ways, combining the features described herein. A number of embodiments have been described. Nevertheless, it will be understood that various modifications can be made without departing from the spirit and scope of the processes and techniques described herein. In addition, other steps can be provided, or steps can be eliminated, from the described process, and other components can be added to, or removed from, the described systems. Accordingly, other embodiments are within the scope of the following claims.

(84) Throughout the description and claims of this specification, the word “comprise” and “contain” and variations of them mean “including but not limited to” and they are not intended to (and do not) exclude other components, integers or steps. Throughout this specification, the singular encompasses the plural unless the context requires otherwise. In particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.

(85) Features, integers characteristics, compounds, chemical moieties or groups described in conjunction with a particular aspect, embodiment or example of the invention are to be understood to be applicable to any other aspect, embodiment or example unless incompatible therewith. All of the features disclosed herein (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive. The invention is not restricted to the details of any foregoing examples or embodiments. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings) or to any novel one, or any novel combination, of the steps of any method or process disclosed.