KR101662478B1 - Water meter to prevent manipulation - Google Patents

Water meter to prevent manipulation Download PDF

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Publication number
KR101662478B1
KR101662478B1 KR1020160038127A KR20160038127A KR101662478B1 KR 101662478 B1 KR101662478 B1 KR 101662478B1 KR 1020160038127 A KR1020160038127 A KR 1020160038127A KR 20160038127 A KR20160038127 A KR 20160038127A KR 101662478 B1 KR101662478 B1 KR 101662478B1
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KR
South Korea
Prior art keywords
hot water
impeller
water meter
lower protrusion
meter
Prior art date
Application number
KR1020160038127A
Other languages
Korean (ko)
Inventor
김병석
김중규
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김병석
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Priority to KR1020160038127A priority Critical patent/KR101662478B1/en
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Publication of KR101662478B1 publication Critical patent/KR101662478B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/007—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus comprising means to prevent fraud
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1063—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water counting of energy consumption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/06—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission
    • G01F1/075—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission with magnetic or electromagnetic coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature
    • G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means
    • G01F15/024—Compensating or correcting for variations in pressure, density or temperature using electrical means involving digital counting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/068—Indicating or recording devices with electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G01F15/0755—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting

Abstract

The present invention relates to an anti-tampering hot water meter, comprising: an impeller (122) rotatable about a pivot (114) protruding from a bottom surface of the hot water meter and rotated by supplied hot water; An impeller assembly 120 provided at a central region of an upper surface of the impeller assembly 120 and configured to measure the number of revolutions of the impeller 122; An inner cover 140 having an upper protrusion 141 whose center portion is recessed upwardly in a cylindrical shape so as to be seated on the upper part of the measuring member 130 of the impeller assembly; A first lower protrusion 251 disposed to overlap with the upper protrusion 141 of the inner cover and protruding downwardly in a cylindrical shape, and a second lower protrusion 251 disposed inside the first lower protrusion 161, A shield cover 250 having a second lower protrusion 252 recessed by a length; A measurement sensor 210 mounted on the second lower protrusion 252 of the shield cover and measuring the number of revolutions of the impeller 122; And a liquid crystal plate (220) for indicating the amount of the hot water supplied in accordance with the number of rotations of the impeller measured by the measuring sensor, thereby improving the measuring member used in the hot water meter, It is possible to prevent the amount of hot water used from being manipulated and at the same time prevent the measurement member of the hot water meter from being influenced by the magnetic force so as to prevent the product from being damaged by the operation and to prevent the measurement member from being detached, Can be improved.

Description

{WATER METER TO PREVENT MANIPULATION}

The present invention relates to a tamper-resistant hot water meter, and more particularly, to an improved tamper resistance meter for use in a hot water meter, which can accurately measure the flow meter reading of the used hot water without being manipulated by a magnet outside, The present invention relates to an anti-tampering hot water meter capable of preventing the hot water meter from falling into the meter.

The hot water meter measures the amount of hot water supplied to each household in order to calculate the hot water usage fee charged to each household of the apartment house.

These hot water meters are installed in each household where residents live, and are used to measure and display the amount of hot water used in each household. Each district heating corporation transfers hot water to each household, measures the amount of hot water used in each household, and imposes a corresponding charge.

The amount of hot water measured in the hot water meter installed in each household is calculated by reading the value indicated by the hot water meter by the meter reading unit belonging to the local business establishment in the area, do.

The contents of the meter reading recorded by the meter reading unit are compiled at the relevant administrative establishment and issued in the form of a bill of payment for the calorie used for each household or each thermal utilization complex. In addition, a remote meter reading management system for remotely checking the usage amount of hot water calculated from the hot water meter installed in each household has been proposed and applied instead of the direct visit of the meter reader.

However, when a general resident of a household in which a hot water meter is installed maliciously uses a magnet having a strong magnetism on one side of the hot water meter for the purpose of reducing the charge for hot water usage, There is a problem that the fee can be set to be as low as that. Recently, problems have become serious enough to become a social issue due to the manipulation of hot water meters in apartment complexes.

In addition, there is a problem that the hot water meter must be replaced or repaired because friction of components, damage and deformation of components are caused by mechanical operation when the hot water meter is operated using a magnet.

In addition, the measuring member of the conventional hot water meter has a problem that it is seated in the groove of the upper surface of the impeller provided therein, so that it easily separates when the impeller rotates or generates noisy noise, and the durability of the impeller assembly deteriorates.

[Prior Patent Literature]

Patent Registration No. 10-1312818 Title of invention: Integrated calorimeter for water meter

It is an object of the present invention, which has been made in view of the above, to improve a measuring member used in a hot water meter and to accurately measure the flow rate of hot water using a hot water meter, The durability of the hot water meter is improved and the durability of the hot water meter is improved by preventing the measuring member of the hot water meter from being affected by the magnetic force and preventing the damaging of the product by the operation and firmly connecting the measuring member to the impeller assembly, And an object of the present invention is to provide a hot water meter for preventing operation.

In order to accomplish the object of the present invention, the operation-preventing hot water meter includes an inlet port 111 through which hot water flows into one side of a supply pipe, and an outlet port 112 through which the hot water flows out from the other side, An impeller (122) rotatably mounted on a pivot (114) protruding from a bottom surface of the inside of the hot water meter and rotatably driven by hot water, the impeller (122) An impeller assembly 120 provided at a central region of the upper surface of the impeller assembly 120 and configured to measure the number of revolutions of the impeller 122; An inner cover 140 having an upper protrusion 141 whose center portion is cylindrically recessed upward so as to be seated on the upper portion of the measuring member 130; A first lower protrusion 251 disposed to overlap with the upper protrusion 141 of the inner cover and protruding downwardly in a cylindrical shape, and a second lower protrusion 251 located inside the first lower protrusion, A shield cover 250 having a second lower protrusion 252; And a measurement sensor (210) mounted on the second lower protrusion (252) of the shield cover and measuring the number of revolutions of the impeller (122); The liquid crystal panel 220 may display the amount of the hot water supplied according to the rotation speed of the impeller 122 measured by the measurement sensor 210.

In the present invention, the central region of the impeller 122 is formed with a predetermined height upward, a hollow insertion hole 120a is formed at the center, and a pivot support 121, which is inserted into the pivot 114, And a ring-shaped slit is formed between the inner surface of the insertion hole 120a and the outer surface of the pivot support 121.

The measuring member 130 includes a cylindrical insertion member 131 which is forcedly inserted into the ring-shaped slit and a plate-like member 132 which is fixed to the upper side surface of the insertion member 131 and has a plate surface .

In addition, the plate surface of the plate member 132 may be formed in a semicircular shape so that the measurement sensor 210 recognizes the plate member 132 when the impeller 120 makes one rotation.

Meanwhile, the measurement member 130 is formed of a non-magnetic material that is not affected by magnetism, and may be formed of stainless steel to prevent oxidation.

The measurement sensor 210 may be a coil sensor that operates to recognize the number of rotations of the measurement member 130.

Lastly, on the upper side of the hot water meter, a plurality of step members 110a formed stepwise are spaced apart from each other along the circumferential direction, and the hot water accumulating unit 200 is provided at the upper part of the hot water meter A separate fastening ring 170 may be provided on the circumferential surface of the hot water accumulating unit 100 to fasten the step unit 110a.

As described above, the tamper-resistant hot water meter according to the present invention improves the measuring member applied to the hot water meter so that the flow meter reading of the used hot water can be accurately performed irrespective of the operation using the magnet from the outside, And the durability of the hot water meter can be improved by preventing the measuring member from being detached from the durability of the hot water meter because the measuring member is firmly coupled to the impeller assembly have.

1 is a perspective view showing the structure of a tamper-resistant hot water meter according to an embodiment of the present invention,
Fig. 2 is an exploded perspective view of the operation-preventing hot water meter shown in Fig. 1,
Fig. 3 is a longitudinal sectional view showing the structure of a longitudinal section of the tamper-resistant hot water meter of Fig. 1,
FIG. 4 is a plan view showing a structure of the main body portion viewed from above with the inner cover of FIG. 1 removed;
FIG. 5A is an exploded perspective view of the impeller assembly shown in FIG. 1 with the pivot support, the impeller, and the measurement member disassembled. FIG.
5B is a view of the coupling of the impeller assembly.
FIG. 6 is an exploded perspective view of the impeller assembly, the inner cover, the shield cover, and the coil sensor of FIG. 1 in an exploded perspective view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an operation prevention hot water meter according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective view showing the structure of the tamper-resistant hot water meter according to the embodiment of the present invention, Fig. 2 is an exploded perspective view of the tamper- Fig. 4 is a plan view showing a structure of a water level meter shown in Fig. 1, in which the inner cover of Fig. 1 is detached, and Fig. 5a is a view showing the pivot support, the impeller, Fig. 5 is a view showing the impeller assembly, Fig. 6 is an exploded perspective view of the impeller assembly, the inner cover bur, the shield cover and the coil sensor, It is a perspective view.

3, the hot water meter according to the present invention includes a body 100 and a fastening ring 170. The body 110 has a cylindrical internal space 113 and is made of a copper material And an outlet 111 through which the hot water flows in one side of the moving body 110 and an outlet 112 through which the hot water flowing in the other side are discharged is provided on the other side of the moving body 110, have.

The inlet 111, the inner space 113 and the outlet 112 of the hot water meter are provided in a straight line so that the hot water introduced through the inlet 111 passes through the inner space 113 and then flows through the outlet 112 And the resistance of the fluid is minimized in the outflow.

5, the impeller assembly 120 includes an impeller 122 and a measuring member 130. The impeller 122 has a pivot 114 protruding from the bottom surface of the hot water meter, The measuring member 130 is provided in a central region of the upper surface of the impeller 122 to measure the number of revolutions of the impeller 122. The impeller 122 is rotatably driven by hot water, .

A pivot 114 is formed at the center of the bottom surface of the inner space 113 to protrude at a predetermined height along the height direction of the moving body 110 and serve as a central axis through which the impeller 122 can rotate.

A plurality of step members 110a formed at predetermined intervals along the circumferential direction are provided on the upper side of the body 110 so that the hot water accumulating unit 200 is fastened to the upper part of the body 110, It is desirable that the body 110 and the hot water accumulating unit 200 can be tightly fastened by the ring 170.

The impeller 122 is rotatably installed in the inner space 113 of the moving body 110 so that the impeller 122 is rotatably driven by the hot water flowing into the inner space 113 of the moving body 110 through the inlet 111, It can play a role in measuring the amount.

5A and 5B, the impeller assembly 120 may further include a pivot support 121. The central area of the impeller 122 is a cylindrical shape protruding upward at a predetermined height, The center of the cylindrical shape is formed with a hollow insertion hole 120a.

5A and 5B, a stepped upper end portion of the pivot support 121 is inserted into the hollow insertion hole 120a on the upper portion of the impeller 122, and the pivot support 121 is inserted into the hollow A ring-shaped slit is formed between the inner surface of the insertion hole 120a and the outer surface of the upper end of the pivot support 121.

3, the measuring member 130 measures the number of revolutions of the impeller assembly 120 rotated by the hot water introduced into the internal space 113 of the body 110 through the inlet 111 The measurement member 130 is composed of an insertion member 131 and a plate-like member 132 (see FIGS. 5A and 5B).

In the conventional hot water meter, since the measuring member is magnetized or seated in the cylindrical groove, the measurement member is detached from the impeller assembly, and often the hot water meter needs to be repaired or the amount of hot water used can not be measured. 5A and 5B, the insertion member 131 of the measurement member 130 is connected to the inner surface of the insertion hole 120a of the impeller and the inner surface of the pivot support 121, Shaped slit formed between the outer surface of the upper end and the outer surface of the upper end. The upper surface of the measurement member is formed of a plate-shaped member 132, which is fixed to the upper side surface of the insertion member 131 and has a semicircular plate surface.

  Since the insertion member 131 of the measurement member is press-fitted into the ring-shaped slit formed between the inner surface of the hollow insertion hole 120a formed at the upper end of the impeller and the outer surface of the stepped upper end of the pivot support 121, 130 maintain the same number of revolutions when the impeller 122 rotates, but are not separated from the impeller.

The hot water introduced through the inlet 111 rotates the impeller 122 and the measuring member 130 rotates by the rotation of the impeller 122.

The measurement member 130 is preferably made of a non-magnetic material so as not to be influenced by a magnetic force, and more preferably, it may be formed of a stainless material so as to prevent oxidation.

 Therefore, by applying a magnetic force to the measuring member 130 side by using a magnet having a strong magnetic force at the outer side of the hot water meter, the rotating speed of the impeller assembly 120 is slowed down, and the operation amount of the hot water can be arbitrarily prevented.

The plate member 132 of the measuring member 130 is formed in a semicircular shape as shown in FIG. 5A, 5B or 6, And the remaining portion of the upper surface of the impeller assembly 120 is composed of the upper surface of the impeller 122 made of a plastic material. The ratio of the area of the upper surface of the plate-like member 132 on the upper surface of the impeller assembly 120 to the upper surface of the impeller has an area ratio effective for measuring the number of revolutions of the impeller.

 As shown in FIGS. 3 and 6, when the impeller assembly 120 rotates once, the resistance value of the measurement sensor 210 formed by the plate surface of the stainless steel plate member 132 from one radius to the other radius , And polycarbonate, and recognizes a change in the resistance value formed by the upper surface of the impeller assembly 120 exposed to the outside, thereby sensing one rotation of the impeller assembly 120.

6, the inner cover 140 has an upper protrusion 141 whose center portion is recessed upwardly in a cylindrical shape, and the upper protrusion 141 is formed by measuring the impeller assembly 120 Is seated on top of the member (130) and then sealed by an O-ring (150). Accordingly, since the measuring member 130 of the impeller assembly 120 is provided below the upper protrusion 141 of the inner cover, it is prevented from being arbitrarily detached from the inner space 113.

The conventional hot water meter does not have an inner cover or the inner cover is not provided with a cylindrical depression, so that the measuring member is often detached. The present invention solves this problem.

The hot water accumulating unit 200 serves to visually recognize the amount of hot water to be used by expressing the number of revolutions of the impeller 122 sensed by the measuring sensor 210 on the upper surface of the body 110 do.

The hot water integrating unit 200 includes a shielding cover 250 including a second lower protrusion 252 and a first lower protrusion 251 on which the measurement sensor 210 is seated, And a liquid crystal plate 220 that counts the number of revolutions of one impeller 122 and displays the number as a number.

6, the hot water meter according to the present invention includes a shielding cover 250 disposed on an upper surface of an inner cover 140. The shielding cover 250 includes a first lower protrusion 251 and a second lower protrusion 251. [ (252). The first lower protrusion 251 of the shield cover protrudes downward in a cylindrical shape and overlaps with the upper protrusion 141 of the inner cover 140. The second lower protrusion 252 is formed to overlap the upper protrusion 141 of the inner cover 140, And is recessed by a predetermined length in a cylindrical shape at the bottom. The measurement sensor 210 is seated on the second lower protrusion 252 of the shielding cover.

The measurement sensor 210 is constituted by a coil sensor which operates so as to recognize the rotation speed of the measurement member 130 and has a core 211 at a central region thereof.

When power is supplied to the coil sensor 210, the electromagnetic force generated from the coil sensor generates a magnetic force to the upper and lower portions through the core 211, and the electromagnetic force is transmitted to the impeller assembly 120 of the semi- The upper surface of the plate member 132 and the impeller of the plastic material are sensed. The detection of the plate member 132 of the stainless steel of the impeller assembly 120 and the sensing of the upper surface of the impeller of the plastic cause a change in the amount of current applied to the coil sensor, And is converted into a pulse signal to measure the number of rotations of the impeller 122.

Since the measurement sensor 210 mounted on the second lower protrusion 252 of the shielding cover is disposed on the upper portion of the measurement member so as to face the measurement member 130, the measurement member rotates once during one rotation of the impeller , And the measurement sensor senses it again and measures the amount of hot water used.

The liquid crystal plate 220 serves to visually express the rotational speed of the impeller assembly 120 measured by the measurement sensor 210. The rotational speed of the impeller assembly 120 is controlled by the internal And can be displayed electronically.

The upper surface of the hot water accumulating unit 200 is prevented from being exposed to the outside and the upper surface of the hot water accumulating unit 200 is prevented from being damaged due to external factors. (Not shown).

It is preferable that the transparent cap 240 is formed of a transparent resin material so that the transparent cap 240 can be identified on the upper side of the hot water integrating unit 200.

According to an embodiment of the present invention, the operation-preventing hot water meter according to an embodiment of the present invention improves a measuring member used in a hot water meter, and therefore, the flow meter reading of hot water use through the hot water meter is related to the operation So that the measurement member of the hot water meter is not influenced by the magnetic force, thereby preventing the damage of the product due to the operation, and the durability of the hot water meter can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: main body 110:
111: inlet 112: outlet
113: internal space 114: pivot
120: impeller assembly 121: pivot support
122: impeller 130: measuring member
131: insertion member 132:
140: inner cover 141: upper projecting surface
150: o-ring 170: fastening ring
200: Hot water integrating unit 210: Measuring sensor
220: liquid crystal plate 240: transparent cap
250: shielding cover 251: first lower protrusion
252: second lower protrusion

Claims (7)

An anti-tampering hot water meter in which an inlet (111) through which hot water flows into one side of a supply pipe is formed and an outlet (112) through which the hot water flows into the other side is formed,
An impeller 122 rotatably mounted on a pivot 114 protruding from a bottom surface of the hot water meter and rotatably driven by the hot water, and an impeller 122 provided in a central region of the upper surface of the impeller 122, An impeller assembly 120 comprising a measurement member 130 formed of a non-magnetic material so as to measure the number of revolutions of the impeller 122; And
An inner cover 140 having an upper protrusion 141 that is recessed upwardly in a cylindrical shape so as to cover the upper portion of the measurement member 130 of the impeller assembly 120; And
A first lower protrusion 251 disposed to overlap with the upper protrusion 141 of the inner cover and protruding downwardly in a cylindrical shape and a second lower protrusion 251 disposed inside the first lower protrusion 251, A shield cover 250 having a second lower protrusion 252; And
A measurement sensor 210 mounted on the second lower protrusion 252 of the shielding cover 250 to measure the number of revolutions of the impeller 122; And,
And a liquid crystal plate (220) for indicating the amount of the hot water supplied according to the rotation number of the impeller (122) measured by the measurement sensor (210)
The impeller assembly 120 further includes a pivot support 121 inserted into the pivot 114 and having a stepped portion at an upper portion of the impeller assembly 120. The inner surface of the hollow insertion hole 120a on the impeller 122, A ring-shaped slit is formed between the outer surface of the upper portion of the support 121 and the insertion member 131 of the measurement member 130 is forcibly press-fitted into the ring-shaped slit
Wherein the water-proof meter comprises: The method according to claim 1,
Wherein the measuring member (130) comprises an insertion member (131) having a hollow cylindrical shape at the center and a plate member (132) having a plate surface. delete The method according to claim 1,
A part of the upper surface of the impeller assembly 120 is constituted by the upper surface of the impeller 122 made of a plastic material and the remainder of the upper surface of the impeller assembly 120 is fixed to the plate surface 132 of the plate member 132 of the measurement member 130. [ Wherein the heat-resistant water-meter is formed in a semicircular shape. The method according to claim 1,
Wherein the measurement member (130) is formed of a non-magnetic material that is not affected by magnetism and is formed of a stainless material so as to prevent oxidation. The method according to claim 1,
Wherein the measuring sensor (210) is a coil sensor that operates to recognize the number of rotations of the measuring member (130). The method according to claim 1,
The hot water meter includes a plurality of step members 110a spaced apart from each other by a predetermined distance along the circumferential direction of the hot water meter. When the hot water accumulating unit 200 is fastened to the hot water meter, (110) is provided on the circumferential surface of the water tank (200), wherein the fastening ring (170) is fastened to the step member (110a).
KR1020160038127A 2016-03-30 2016-03-30 Water meter to prevent manipulation KR101662478B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900005882A1 (en) * 2019-04-16 2020-10-16 B Meters S R L COUNTER FOR FLUIDS.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002081971A (en) * 2000-09-07 2002-03-22 Aichi Tokei Denki Co Ltd Electronic water meter for wireless meter reading
KR20090093328A (en) * 2008-02-29 2009-09-02 (주)위지트 Measuring instrument
KR101560265B1 (en) * 2013-11-28 2015-10-14 차호준 Electronic type water meter has been applied nonmagnetic material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002081971A (en) * 2000-09-07 2002-03-22 Aichi Tokei Denki Co Ltd Electronic water meter for wireless meter reading
KR20090093328A (en) * 2008-02-29 2009-09-02 (주)위지트 Measuring instrument
KR101560265B1 (en) * 2013-11-28 2015-10-14 차호준 Electronic type water meter has been applied nonmagnetic material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900005882A1 (en) * 2019-04-16 2020-10-16 B Meters S R L COUNTER FOR FLUIDS.

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