CN114646421B - High-pressure-resistant corrosion-resistant remote pressure difference sensor - Google Patents
High-pressure-resistant corrosion-resistant remote pressure difference sensor Download PDFInfo
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- CN114646421B CN114646421B CN202210238916.5A CN202210238916A CN114646421B CN 114646421 B CN114646421 B CN 114646421B CN 202210238916 A CN202210238916 A CN 202210238916A CN 114646421 B CN114646421 B CN 114646421B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 15
- 230000007797 corrosion Effects 0.000 title claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims description 14
- 239000004636 vulcanized rubber Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0046—Fluidic connecting means using isolation membranes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
- G01L19/0654—Protection against aggressive medium in general against moisture or humidity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0672—Leakage or rupture protection or detection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a high-pressure-resistant corrosion-resistant remote pressure difference sensor, which comprises: the two ends of the cylinder body are open; the cylinder cover is fixed at the top of the cylinder body; the cylinder bottom is fixed at the bottom of the cylinder body; the measuring component is arranged in the cylinder body and is fixedly connected with the bottom of the cylinder; the pressure taking accessories are provided with two pressure measuring ends which are respectively positioned at two sides of the cylinder body and are connected with the two pressure measuring ends of the measuring assembly; the pressure taking accessory comprises: mounting flange, diaphragm and protective cover; the diaphragm is fixed on the surface of the mounting flange, the protective cover is fixedly connected with the mounting flange, and the diaphragm is arranged in the protective cover; the surface of the protective cover is provided with a plurality of through holes; the outer part of the capillary is wrapped with a layer of protective sleeve; the two capillaries are respectively connected with two pressure measuring ends of the measuring assembly; one end of the capillary tube penetrates through the side wall of the cylinder body and is fixedly connected with the pressure measuring end of the measuring assembly, and the other end of the capillary tube is fixedly connected with the diaphragm. The medium-pressure differential sensor can be used for deep sea operation, has high-pressure resistance and corrosion resistance, and has accurate measurement data.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a high-pressure-resistant corrosion-resistant remote pressure difference sensor.
Background
The existing remote pressure difference sensor mainly comprises a measuring component, a mounting flange, a capillary tube and the like, wherein the mounting flange comprises a static pressure diaphragm and a full pressure diaphragm, the static pressure diaphragm and the full pressure diaphragm are respectively connected to a static pressure end and a full pressure end of the measuring component through the capillary tube, the measuring component converts the two pressure differences into electric signals, and the electric signals are transmitted to a user for use by adopting a standard signal of 4-20 Ma after being processed.
However, conventional differential pressure sensors typically do not have the capability of integral pressure resistance, nor do pressure-taking diaphragms have protection facilities, and their measurement components and capillaries typically need to be installed in spaces with good environmental conditions, and only the diaphragms are in direct contact with the fluid to be measured, which makes them unable to accommodate harsh environments without enclosed spaces, such as deep sea, even if there are limitations in use. In addition, the length of the capillary tube of the traditional differential pressure sensor is not more than 10m, and the pressure measuring precision of the sensor correspondingly decreases along with the lengthening of the capillary tube.
Therefore, the research on the high-pressure-resistant corrosion-resistant remote pressure difference sensor which can be used for deep sea operation and has accurate measurement data is a problem which needs to be solved by the person skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a high-pressure-resistant corrosion-resistant remote pressure difference sensor which can be used for deep sea operation and has accurate measurement data.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a high pressure resistant, corrosion resistant remote pressure differential sensor comprising:
the two ends of the cylinder body are open;
the cylinder cover is fixed on the top of the cylinder body;
the cylinder bottom is fixed at the bottom of the cylinder body;
the measuring component is arranged in the cylinder body and is fixedly connected with the cylinder bottom;
the pressure taking accessories are provided with two pressure taking accessories, are respectively positioned at two sides of the cylinder body and are connected with two pressure measuring ends of the measuring assembly; the pressure taking accessory comprises: mounting flange, diaphragm and protective cover; the diaphragm is fixed on the surface of the mounting flange, the protective cover is fixedly connected with the mounting flange, and the diaphragm is arranged in the protective cover; the surface of the protective cover is provided with a plurality of through holes;
the outer part of the capillary tube is wrapped with a layer of protective sleeve; the two capillaries are respectively connected with two pressure measuring ends of the measuring assembly; one end of the capillary tube penetrates through the side wall of the cylinder body and is fixedly connected with the pressure measuring end of the measuring assembly, and the other end of the capillary tube is fixedly connected with the diaphragm.
The technical scheme has the beneficial effects that the high-pressure-resistant and corrosion-resistant rubber tube protective sleeve is wrapped outside the capillary tube, so that the capillary tube can be secondarily protected and the scratch resistance and the treading resistance are improved; the protective cover of the pressure taking accessory is arranged on the mounting flange through threads, so that the diaphragm can be effectively prevented from being damaged in the mounting or using process; the protective cover is provided with a through hole, so that the diaphragm can be directly contacted with water, and the accuracy of pressure measurement is ensured.
Preferably, the cylinder cover is fixedly connected with the cylinder body through bolts, and a sealing ring is arranged at the joint of the cylinder cover and the cylinder body. The setting of sealing washer makes cover and barrel sealing connection, avoids in the use water enters into the barrel, causes the influence to measuring assembly's normal use.
Preferably, a connector for connecting with an external cable is fixedly connected to the wall of the cylinder. The setting of connector is convenient to be connected measuring assembly and external cable, and then goes out the pressure signal that will measure through external cable transmission.
Preferably, the bottom of the measuring assembly is fixed to the cylinder bottom through a clamp. The measuring assembly can be fixed more firmly through the clamp.
Preferably, the cylinder bottom is fixedly connected with a cylinder electrode. The cylinder electrode can detect whether the leakage condition exists in the cylinder.
Preferably, a bracket for supporting the capillary tube is fixed on the barrel bottom, a groove for the bracket and the capillary tube to pass through is formed in the side wall of the barrel, the bracket is arranged in the groove, and the capillary tube and the bracket are in sealing connection with the wall of the groove. The support plays a supporting role on the capillary tube, so that the capillary tube is convenient to connect with the measuring assembly, and the support and the capillary tube are welded with the cylinder body, so that the connecting position is sealed.
Preferably, capillary electrodes are fixedly connected to two capillaries inside the cylinder. The capillary electrode can detect whether there is a leak in the capillary.
Preferably, a pressure chip is arranged in the measuring assembly, the two capillaries are respectively connected to two ends of the pressure chip, and a circuit compensation plate for compensating signals is arranged in the pressure chip. The pressure chip senses weak electric signals transmitted by the two diaphragms, the circuit compensation board can compensate the weak electric signals and convert the weak electric signals into standard signals, and then the signals are produced, so that ultra-long-distance pressure accurate transmission can be realized.
Preferably, the cylinder is internally filled with normal-temperature vulcanized rubber. The potting of the vulcanized rubber can carry out secondary watertight protection on the measuring assembly, so that the problem of local leakage of the welding part caused by pitting corrosion, stress concentration and the like in the long-term use process can be prevented, and the overall reliability of the product is improved.
Compared with the prior art, the invention discloses a high-pressure-resistant corrosion-resistant remote pressure difference sensor, which has the beneficial effects that:
(1) All main components in the invention are welded and connected, so that the overall water pressure resistance, seawater corrosion resistance and electrochemical corrosion resistance are effectively improved;
(2) The capillary electrode and the cylinder electrode are arranged in the cylinder, so that the watertight state of the sensor can be remotely monitored, and the sensor can be early warned in advance and timely reminded of being maintained or replaced by a user;
(3) The measuring assembly in the cylinder is internally provided with a compensation circuit board, so that ultra-long-distance pressure accurate transmission can be realized;
(4) The normal-temperature vulcanized rubber is filled in the cylinder body in a sealing way, and secondary watertight protection is carried out on the measuring assembly, so that the problem of local leakage of welding parts caused by pitting corrosion, stress concentration and the like in the long-term use process can be prevented, and the overall reliability of the product is improved;
(5) The protective cover of the pressure taking accessory is arranged on the mounting flange through threads, so that the problem that the diaphragm is directly exposed to fluid without protection and is easily damaged can be solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a differential pressure sensor according to the present invention;
FIG. 2 is a schematic view of the inside of a differential pressure sensor cylinder according to the present invention;
FIG. 3 is a schematic structural view of a differential pressure sensor cylinder provided by the present invention;
FIG. 4 is a schematic view of a differential pressure sensor capillary tube and a protective sleeve according to the present invention;
FIG. 5 is a schematic diagram of a differential pressure sensor pressure-taking accessory according to the present invention;
fig. 6 is a cross-sectional view taken at section A-A of fig. 5, provided by the present invention.
Wherein, in the drawing,
1-a cylinder;
011-grooves;
2-a cylinder cover; 3-barrel bottom; 4-a measurement assembly;
5-a pressure taking accessory;
51-mounting a flange; 52-a membrane;
53-a protective cover;
531-through holes;
6-capillary; 7-protecting sleeve; 8-a sealing ring; a 9-connector; 10-clamping hoop; 11-a cylinder electrode; 12-a bracket; 13-capillary electrode.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a high-pressure-resistant corrosion-resistant remote pressure difference sensor, which comprises:
the two ends of the cylinder body 1 are open;
the cylinder cover 2 is fixed on the top of the cylinder body 1;
the barrel bottom 3, the barrel bottom 3 is fixed at the bottom of the barrel body 1;
the measuring component 4 is arranged in the cylinder 1 and is fixedly connected with the cylinder bottom 3;
the pressure taking accessories 5 are arranged, and the two pressure taking accessories 5 are respectively positioned at two sides of the cylinder body 1 and are connected with two pressure measuring ends of the measuring assembly 4; the pressure taking attachment 5 includes: a mounting flange 51, a diaphragm 52 and a protective cover 53; the diaphragm 52 is fixed on the surface of the mounting flange 51, the protective cover 53 is fixedly connected with the mounting flange 51, and the diaphragm 52 is arranged in the protective cover 53; the surface of the protective cover 53 is provided with a plurality of through holes 531;
the capillary 6, the outside of capillary 6 wraps up a layer of protective sleeves 7; the capillary tube 6 is provided with two, and is respectively connected with two pressure measuring ends of the measuring assembly 4; one end of the capillary tube 6 penetrates through the side wall of the cylinder body 1 and is fixedly connected with the pressure measuring end of the measuring assembly 4, and the other end of the capillary tube is fixedly connected with the diaphragm 52. The cylinder body 1 and the cylinder bottom 3 are welded, and the protective sleeve 7 of the capillary tube 6 is welded with the cylinder body 1, so that the sealing effect of the cylinder body 1 is ensured.
In order to further optimize the technical scheme, the cylinder cover 2 is fixedly connected with the cylinder body 1 through bolts, and a sealing ring 8 is arranged at the joint of the cylinder cover 2 and the cylinder body 1. The sealing rings 8 are arranged in two, so that the sealing effect is better.
In order to further optimize the technical scheme, a connector 9 for connecting with an external cable is fixedly connected to the wall of the cylinder body 1. The connector 9 is screwed with the cylinder.
In order to further optimize the solution described above, the bottom of the measuring assembly 4 is fixed to the bottom 3 by means of a clip 10. As shown in fig. 2, two clips 10 are provided, each of which is fixed to both sides of the bottom of the measuring assembly 4.
In order to further optimize the technical scheme, the cylinder electrode 11 is fixedly connected to the cylinder bottom 3, and the cylinder electrode 11 is in threaded connection with the top of the cylinder bottom 3.
In order to further optimize the technical scheme, a support 12 for supporting the capillary tube 6 is fixed on the barrel bottom 3, a groove 011 for the support 12 and the capillary tube 6 to penetrate is formed in the side wall of the barrel 1, the support 12 is arranged in the groove 011, and the capillary tube 6 and the support 12 are in sealing connection with the wall of the groove 011. As shown in fig. 2, the capillary tube 6 is welded with the support 12 through the protective sleeve 7, the top of the support 12 is provided with an arc-shaped groove, the arc-shaped groove is matched with the protective sleeve 7, the capillary tube 6 can be supported better, the support 12 is also convenient to be connected with the protective sleeve 7 in a sealing way, and the protective sleeve 7 and the support 12 of the capillary tube 6 are welded with the groove 011 of the cylinder 1.
In order to further optimize the technical scheme, capillary electrodes 13 are fixedly connected to two capillaries 6 positioned in the cylinder 1.
In order to further optimize the technical scheme, a pressure chip is arranged in the measuring assembly 4, two capillaries 6 are respectively connected to two ends of the pressure chip, and a circuit compensation board for compensating signals is arranged in the pressure chip.
In order to further optimize the technical scheme, normal-temperature vulcanized rubber is filled and sealed in the cylinder body 1.
The working process comprises the following steps:
during detection, the two pressure taking accessories 5 face the flow velocity direction of the fluid to be detected and the normal direction of the flow velocity respectively, the diaphragms 52 of the two pressure taking accessories 5 sense pressures at two places, pressure signals are transmitted to two ends of a pressure chip in the measuring assembly 4 through the capillary tube 6, the pressure chip senses pressure difference of the two pressure signals and generates weak electric signals, the signals are compensated by a circuit compensation board in the pressure chip and are converted into 4-20 mA standard signals, and the standard signals are transmitted through an external cable of the connector 9;
when the cylinder electrode 11 and the capillary electrode 13 in the cylinder 1 are contacted with water, weak electric signals can be generated, the signals are transmitted out through the external cable of the connector 9, and a user can judge the internal leakage condition of the differential pressure sensor according to the intensity of the signals.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A high pressure resistant, corrosion resistant remote pressure differential sensor comprising:
the device comprises a cylinder body (1), wherein two ends of the cylinder body (1) are in an opening shape;
a cylinder cover (2), wherein the cylinder cover (2) is fixed at the top of the cylinder body (1);
the cylinder bottom (3), the cylinder bottom (3) is fixed at the bottom of the cylinder body (1);
the measuring component (4) is arranged in the cylinder body (1) and is fixedly connected with the cylinder bottom (3);
the pressure taking accessories (5) are arranged, and the two pressure taking accessories (5) are respectively positioned at two sides of the cylinder body (1) and are connected with two pressure measuring ends of the measuring assembly (4); the pressure taking accessory (5) comprises: a mounting flange (51), a diaphragm (52) and a protective cover (53); the membrane (52) is fixed on the surface of the mounting flange (51), the protective cover (53) is fixedly connected with the mounting flange (51), and the membrane (52) is arranged in the protective cover (53); a plurality of through holes (531) are formed in the surface of the protective cover (53);
the capillary tube (6), the outside of the capillary tube (6) is wrapped with a layer of protective sleeve (7); the two capillaries (6) are respectively connected with two pressure measuring ends of the measuring assembly (4); one end of the capillary tube (6) penetrates through the side wall of the cylinder body (1) to be fixedly connected with the pressure measuring end of the measuring assembly (4), and the other end of the capillary tube is fixedly connected with the diaphragm (52);
the cylinder bottom (3) is fixedly connected with a cylinder electrode (11); two capillaries (6) positioned in the cylinder (1) are fixedly connected with capillary electrodes (13);
the inside of the measuring assembly (4) is provided with a pressure chip, the two capillaries (6) are respectively connected to two ends of the pressure chip, the pressure chip is internally provided with a circuit compensation board for compensating signals, and the signals are compensated by the circuit compensation board inside the pressure chip and are converted into 4-20 mA standard signals;
a bracket (12) for supporting the capillary tube (6) is fixed on the barrel bottom (3), a groove (011) for the bracket (12) and the capillary tube (6) to pass through is formed in the side wall of the barrel body (1), the bracket (12) is arranged in the groove (011), and the capillary tube (6) and the bracket (12) are in sealing connection with the groove wall of the groove (011);
the cylinder cover (2) is fixedly connected with the cylinder body (1) through bolts, and a sealing ring (8) is arranged at the joint of the cylinder cover (2) and the cylinder body (1);
a connector (9) used for being connected with an external cable is fixedly connected to the cylinder wall of the cylinder body (1);
the bottom of the measuring assembly (4) is fixed on the cylinder bottom (3) through a clamp (10);
and normal-temperature vulcanized rubber is filled and sealed in the cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210238916.5A CN114646421B (en) | 2022-03-11 | 2022-03-11 | High-pressure-resistant corrosion-resistant remote pressure difference sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210238916.5A CN114646421B (en) | 2022-03-11 | 2022-03-11 | High-pressure-resistant corrosion-resistant remote pressure difference sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114646421A CN114646421A (en) | 2022-06-21 |
| CN114646421B true CN114646421B (en) | 2024-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210238916.5A Active CN114646421B (en) | 2022-03-11 | 2022-03-11 | High-pressure-resistant corrosion-resistant remote pressure difference sensor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1114483A (en) * | 1997-06-27 | 1999-01-22 | Yokogawa Electric Corp | Diaphragm seal type differential pressure measuring device |
| CN2562730Y (en) * | 2002-07-26 | 2003-07-30 | 中南大学 | Non-invasive vein pressure measurer |
| CN105352651A (en) * | 2015-12-04 | 2016-02-24 | 中国原子能科学研究院 | High-temperature-resistant corrosion-resistant anti-crystallization pressure and differential pressure transmitter isolation module |
| CN108760137A (en) * | 2018-07-25 | 2018-11-06 | 浙江洛丁森智能科技有限公司 | A kind of teletransmission component and the teletransmission pressure transmitter including the teletransmission component |
| DE102020110728A1 (en) * | 2020-04-20 | 2021-10-21 | Endress+Hauser SE+Co. KG | Differential pressure transducer for determining the differential pressure of two pressures |
| CN215178322U (en) * | 2021-05-12 | 2021-12-14 | 武汉超宇测控技术有限公司 | Deep sea total pressure sensor |
-
2022
- 2022-03-11 CN CN202210238916.5A patent/CN114646421B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1114483A (en) * | 1997-06-27 | 1999-01-22 | Yokogawa Electric Corp | Diaphragm seal type differential pressure measuring device |
| CN2562730Y (en) * | 2002-07-26 | 2003-07-30 | 中南大学 | Non-invasive vein pressure measurer |
| CN105352651A (en) * | 2015-12-04 | 2016-02-24 | 中国原子能科学研究院 | High-temperature-resistant corrosion-resistant anti-crystallization pressure and differential pressure transmitter isolation module |
| CN108760137A (en) * | 2018-07-25 | 2018-11-06 | 浙江洛丁森智能科技有限公司 | A kind of teletransmission component and the teletransmission pressure transmitter including the teletransmission component |
| DE102020110728A1 (en) * | 2020-04-20 | 2021-10-21 | Endress+Hauser SE+Co. KG | Differential pressure transducer for determining the differential pressure of two pressures |
| CN215178322U (en) * | 2021-05-12 | 2021-12-14 | 武汉超宇测控技术有限公司 | Deep sea total pressure sensor |
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| Title |
|---|
| 任一村.《销售专用石油石化职业技能培训教程 油品储运调和操作工》.石油大学出版社,2012,第1-4页. * |
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| CN114646421A (en) | 2022-06-21 |
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