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according to me there are five types of manometer
1. Simple Manometer
Can measure negative presures too .A improved version of piezometer (fig is shown on the page )
2. micro manometer
more sensitive
3. inclined tube manometer
micro manometer with inclined tube or simple manometer with inclined tube
4. Differential Manometer
measure pressure difference between two pressure sources
5. Inverted tube manometer
used to measure low pressures and more sensitive for low pressures.
124.125.21.85
14:02, 17 January 2007 (UTC)
I think this page needs to be reworked. "manometer" typically only refers to devices that use a fluid column to measure pressure. I suggest re-titling the page, maybe "Pressure Measuring Devices," then restructuring the article. Break it up into 1. Manometers (include piezometer tube, u-tube manometer, and inclined tube manometer), and 2. Mechanical and Electronic Pressure measuring devices (Bourdon gage, and other electronic pressure transducers). —The preceding unsigned comment was added by Simsea ( talk • contribs) .
I disagree with merging
pressure gauge into
manometer because manometer specifically refers to pressures below atmospheric, whereas most pressure gauges measure pressures above atmospheric. Maybe you could make a better case for merging in the opposite direction,
manometer into
pressure gauge, but I would still disagree with that because there are many significant design characteristics of vacuum gauges that merit a seperate article. I do still support, and have tagged, a merge from
vacuum gauge to
manometer,
pressure measurement possibly presented as a type of
pressure gauge.--
Yannick
17:30, 6 August 2006 (UTC)
I think this area is in a bit of a mess and could do with a damn good tidy. We need a single 'launch' article for gas/liquid pressure measuring devices, with one-paragraph descriptions of all types of gauges, plus main articles on each of the gauge types. So, I suggest we merge Manometer, Vacuum gauge, and Pressure gauge. The final title is a secondary concern, as long as redirects are in place. Mr Stephen 08:35, 7 August 2006 (UTC)
Sorry, I though I had posted here, but it was on my sandbox. I see we have Vacuummeter too. I assumed the structure of the main article would be something like this:
Any missing? Mr Stephen 23:03, 13 August 2006 (UTC)
Uh - how about: piezoresistive gauges (all the silicon types) vibrating cylinders (Solartron) —The preceding unsigned comment was added by 67.78.68.5 ( talk • contribs) .
Deadweight testers, one of the two basic standards. (Liquid-column manometers are the other). Rather less significant are resonant-wire transducers. NebY 17:07, 15 August 2006 (UTC)
Two points on article structure:
Here's a more comprehensive structure we could use, assuming that we are merging everything under the title of pressure gauge:
Overview
I haven't worked with piezoelectric/piezoresistive gauges except as secondary transducers on a diaphragm. Do they really have a standalone form like that "vibrating cylinder" mentioned by the anonymous contributor above? Also the Vacuummeter article seems to use a lot of classifications that I don't recognize. Can someone fit them in?-- Yannick 22:53, 15 August 2006 (UTC)
Four quick comments:
For the sake of consensus, I weakly support merging the whole lot under the title of Pressure measurement as suggested by NebY. I used to want separate articles for manometers and pressure gauges, but I think I see the logic of a complete merge under this comprehensive title, as long as it's something neutral like Pressure measurement. Mr. Stephen has said above that he supports a complete merge and doesn't care as much about the title, so I think we have consensus on this:
Merge Manometer, Vacuum gauge, Vacuummeter and Pressure gauge to Pressure measurement-- Yannick 01:46, 22 August 2006 (UTC)
Agree Mr Stephen 08:00, 22 August 2006 (UTC)
That looks like a consensus. So should we create Pressure Measurement with a skeleton structure, fill it in, then remove Manometer etc - or rather would one of you that has more Wiki experience than I like to lead? NebY 07:35, 28 August 2006 (UTC)
The vacuum gauge article that I merged here had some weird stuff about pumps used as gauges. I moved it here instead of the main article:
Turbopump - Make the output a dead end and measure current for a given rotations/s.
Membrane pump - Measure membrane displacement to measure the pressure difference between two spaces.
Ion getter pump - This gauge is named the Penning gauge. It measures the current.
-- Yannick 12:27, 4 September 2006 (UTC)
Both of those pictures of the mechanics are horribly overexposed to the point where they are basically unusable. Does anyone have any alternatives? - lommer 03:54, 22 Apr 2004 (UTC)
Replaced with an improved image of the mechanical details, write me if you want a new shot for printing, etc. Leonard G. 19:37, 22 Apr 2004 (UTC)
As discussed above, I didn't know what to do with many of these types on the Vacuummeter article, so I'm dropping them off here for someone else to mess with:
A Vacuummeter is a device to meter pressure below atmospheric pressure
Types:
-- Yannick 12:54, 4 September 2006 (UTC)
I'm not sure about the captions on two of the pictures. The "Pile of aneroid bellows in a barograph" has shadows that make me suspect it is really a pile of corrugated pressure capsules. The "Membrane-type manometer" does not show any inner workings, and dial gauges are more commonly based on Bourdon tubes. Can anyone confirm these captions or offer more information?-- Yannick 00:31, 6 September 2006 (UTC)
Under the section "liquid column" the caption to the manometer is "The difference in fluid height in a liquid column barometer is proportional to the pressure difference. " The equation is then . Shouldn't the equation be ? This is my first edit so I didn't want to go ahead and do it on the article. Nyr56 20:56, 14 September 2006 (UTC)
I'll have to track down some references but it should be mentioned that the Bourdon-style gauge may be the most common type, with hundreds of millions of instances in use everywhere from tire inflators to power plants. A comparative discussion of the limitations of each type of measuring device would be helpful (costs, precision, measured fluids, range of application) -some of the vacuum types already show usual pressure ranges. Bourdon tubes go up from a few to tens of thousands of PSI, for example. Capacitive types are very common in industry as transducers for process control, as are silicon strain gauge types. Differential types for use with flow measuring orifices and Venturi tubes. Direct-reading (non-electronic) instruments vs. electronic pressure transmitters. Lots to add. -- Wtshymanski 21:09, 18 September 2007 (UTC)
shouldn't any gauge that measures any unit of vacuum/pressure be on the same page. A vacuum is only very low pounds per squere inch based on a zero reference or it is mearly a negative number on a relative gauge. All we are talking about is scale. a manometer is a pressure guage that measures the pressure by measureing the weight of the column of air above it based on a reference weight on top of the column pushing down, this can be acheived in many different design methods. Hence, all manometers are pressure guages but all pressure guages are not manometers. So the pages for vacuum, pressure and all other types of pressure guages should be under the same article and reference in the table of contents, they all measure the same thing right? Brad —Preceding unsigned comment added by 68.54.220.29 ( talk) 00:26, 26 September 2007 (UTC)
Moved from article. The second paragrpah should at least start in a different way. Maybe it´s refering to a variation OF the the McLeod gauge. 201.213.220.35
Redhead gauge? Nude Gauge? MAN-O-METER? Who are you trying to fool? I'm going to mark this article as Adults Only, unless you at least add a note on how to pronounce manometer: ma-NOM-e-ter or MAN-o-meter, please use IPA too ☺. Jidanni ( talk) 02:36, 14 June 2008 (UTC)
"Most ion gauges come in two types: hot cathode and cold cathode, a third type exists which is more sensitive and expensive known as a spinning rotor gauge, but is not discussed here."
There are only two types of ion gauges, SRGs have nothing to do with ionization. They work purely mechanical. 141.84.69.20 ( talk) 22:17, 21 July 2008 (UTC)
Penning pressure gauge: In the text it is stated that the arrangement of magnetic field and electrodes is such that the ions have a pathlength of meters. This is incorrect. The arrangement is such that the electrons have a very long pathlength. In fact the arrangement is such that the electrons cannot reach the anode (+) unless they collide with gas atoms. So the plane of the anode ring is perndicular to the magnetic field. At both sides of the ring there is an anode plate. Kind regards, Karel van der Mast, kvdmast@solveigh.com — Preceding unsigned comment added by 77.169.8.250 ( talk) 09:59, 15 December 2011 (UTC)
The following sentence: "Thus a vacuum of 26 inHg gauge is equivalent to an absolute pressure of 30 inHg (typical atmospheric pressure) − 26 inHg = 4 inHg." seems slightly unacceptable to me. It should be expressed in (k)Pa. The inHg units could be added in parenthesis (if still useful for those who use those units). -- Mojca Miklavec ( talk) 08:08, 15 September 2013 (UTC)
they seem to cover identical topics-- 137.205.174.41 ( talk) 16:02, 19 August 2014 (UTC)
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We seem to be missing a few key pieces of information here. First, we have a section on static and dynamic pressures, but it is missing the third component of total pressure, which is hydrostatic pressure. Static pressure of course is pressure without relation to motion or gravity. Hydrostatic pressure is pressure related to gravity, whereas dynamic pressure is a pressure differential caused by flow. Hydrostatic pressure gauges of course use a liquid column, whereas aneroid gauges measure only the static pressure. Dynamic pressures occur in things like water hammer, the capture zone of a fan, or within centrifugal or axial-flow compressors, and are pressures caused by the motion of a fluid, which of course is difficult to measure at any single place but is measured as a differential between two or more spots.
Then I think we should also have a section about precision and errors, such as calibration, tolerances, graduation, and parallax errors. Bourdon gauges, for example, are great instruments, but the flexing of the tube over time leads to fatigue, hardening and stiffening of the metal, which affects its calibration. (Not unlike a torque wrench; every time you use it the calibration gets a little, tiny bit more off.) This effect is increased dramatically if the gauge is pushed beyond 80% of its maximum limit on a regular basis. This and other wear is accelerated even more if the gauge is subjected to a lot of shaking or vibration, which can also cause errors in reading the gauge. That's why some are filled with glycerin, to dampen vibration. Plus they are highly vulnerable to parallax error, which is caused when the eye of the observer is not perfectly in line with the needle and the marking. This is made worse if there is any distance between the needle and faceplate, although some gauges have mirrored faceplates to help prevent this. (If you can't see the needle's reflection, then you know you're in line. Note, parallax errors can occur in other gauges as well, such as a liquid column, caused by the thickness of the glass tube.) I'll work on this when I have a little more time. Zaereth ( talk) 18:56, 30 August 2019 (UTC)
wide overlap fgnievinski ( talk) 20:00, 9 March 2022 (UTC)
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![]() | The contents of the Piezometer page were merged into Pressure measurement on 18 June 2023. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
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according to me there are five types of manometer
1. Simple Manometer
Can measure negative presures too .A improved version of piezometer (fig is shown on the page )
2. micro manometer
more sensitive
3. inclined tube manometer
micro manometer with inclined tube or simple manometer with inclined tube
4. Differential Manometer
measure pressure difference between two pressure sources
5. Inverted tube manometer
used to measure low pressures and more sensitive for low pressures.
124.125.21.85
14:02, 17 January 2007 (UTC)
I think this page needs to be reworked. "manometer" typically only refers to devices that use a fluid column to measure pressure. I suggest re-titling the page, maybe "Pressure Measuring Devices," then restructuring the article. Break it up into 1. Manometers (include piezometer tube, u-tube manometer, and inclined tube manometer), and 2. Mechanical and Electronic Pressure measuring devices (Bourdon gage, and other electronic pressure transducers). —The preceding unsigned comment was added by Simsea ( talk • contribs) .
I disagree with merging
pressure gauge into
manometer because manometer specifically refers to pressures below atmospheric, whereas most pressure gauges measure pressures above atmospheric. Maybe you could make a better case for merging in the opposite direction,
manometer into
pressure gauge, but I would still disagree with that because there are many significant design characteristics of vacuum gauges that merit a seperate article. I do still support, and have tagged, a merge from
vacuum gauge to
manometer,
pressure measurement possibly presented as a type of
pressure gauge.--
Yannick
17:30, 6 August 2006 (UTC)
I think this area is in a bit of a mess and could do with a damn good tidy. We need a single 'launch' article for gas/liquid pressure measuring devices, with one-paragraph descriptions of all types of gauges, plus main articles on each of the gauge types. So, I suggest we merge Manometer, Vacuum gauge, and Pressure gauge. The final title is a secondary concern, as long as redirects are in place. Mr Stephen 08:35, 7 August 2006 (UTC)
Sorry, I though I had posted here, but it was on my sandbox. I see we have Vacuummeter too. I assumed the structure of the main article would be something like this:
Any missing? Mr Stephen 23:03, 13 August 2006 (UTC)
Uh - how about: piezoresistive gauges (all the silicon types) vibrating cylinders (Solartron) —The preceding unsigned comment was added by 67.78.68.5 ( talk • contribs) .
Deadweight testers, one of the two basic standards. (Liquid-column manometers are the other). Rather less significant are resonant-wire transducers. NebY 17:07, 15 August 2006 (UTC)
Two points on article structure:
Here's a more comprehensive structure we could use, assuming that we are merging everything under the title of pressure gauge:
Overview
I haven't worked with piezoelectric/piezoresistive gauges except as secondary transducers on a diaphragm. Do they really have a standalone form like that "vibrating cylinder" mentioned by the anonymous contributor above? Also the Vacuummeter article seems to use a lot of classifications that I don't recognize. Can someone fit them in?-- Yannick 22:53, 15 August 2006 (UTC)
Four quick comments:
For the sake of consensus, I weakly support merging the whole lot under the title of Pressure measurement as suggested by NebY. I used to want separate articles for manometers and pressure gauges, but I think I see the logic of a complete merge under this comprehensive title, as long as it's something neutral like Pressure measurement. Mr. Stephen has said above that he supports a complete merge and doesn't care as much about the title, so I think we have consensus on this:
Merge Manometer, Vacuum gauge, Vacuummeter and Pressure gauge to Pressure measurement-- Yannick 01:46, 22 August 2006 (UTC)
Agree Mr Stephen 08:00, 22 August 2006 (UTC)
That looks like a consensus. So should we create Pressure Measurement with a skeleton structure, fill it in, then remove Manometer etc - or rather would one of you that has more Wiki experience than I like to lead? NebY 07:35, 28 August 2006 (UTC)
The vacuum gauge article that I merged here had some weird stuff about pumps used as gauges. I moved it here instead of the main article:
Turbopump - Make the output a dead end and measure current for a given rotations/s.
Membrane pump - Measure membrane displacement to measure the pressure difference between two spaces.
Ion getter pump - This gauge is named the Penning gauge. It measures the current.
-- Yannick 12:27, 4 September 2006 (UTC)
Both of those pictures of the mechanics are horribly overexposed to the point where they are basically unusable. Does anyone have any alternatives? - lommer 03:54, 22 Apr 2004 (UTC)
Replaced with an improved image of the mechanical details, write me if you want a new shot for printing, etc. Leonard G. 19:37, 22 Apr 2004 (UTC)
As discussed above, I didn't know what to do with many of these types on the Vacuummeter article, so I'm dropping them off here for someone else to mess with:
A Vacuummeter is a device to meter pressure below atmospheric pressure
Types:
-- Yannick 12:54, 4 September 2006 (UTC)
I'm not sure about the captions on two of the pictures. The "Pile of aneroid bellows in a barograph" has shadows that make me suspect it is really a pile of corrugated pressure capsules. The "Membrane-type manometer" does not show any inner workings, and dial gauges are more commonly based on Bourdon tubes. Can anyone confirm these captions or offer more information?-- Yannick 00:31, 6 September 2006 (UTC)
Under the section "liquid column" the caption to the manometer is "The difference in fluid height in a liquid column barometer is proportional to the pressure difference. " The equation is then . Shouldn't the equation be ? This is my first edit so I didn't want to go ahead and do it on the article. Nyr56 20:56, 14 September 2006 (UTC)
I'll have to track down some references but it should be mentioned that the Bourdon-style gauge may be the most common type, with hundreds of millions of instances in use everywhere from tire inflators to power plants. A comparative discussion of the limitations of each type of measuring device would be helpful (costs, precision, measured fluids, range of application) -some of the vacuum types already show usual pressure ranges. Bourdon tubes go up from a few to tens of thousands of PSI, for example. Capacitive types are very common in industry as transducers for process control, as are silicon strain gauge types. Differential types for use with flow measuring orifices and Venturi tubes. Direct-reading (non-electronic) instruments vs. electronic pressure transmitters. Lots to add. -- Wtshymanski 21:09, 18 September 2007 (UTC)
shouldn't any gauge that measures any unit of vacuum/pressure be on the same page. A vacuum is only very low pounds per squere inch based on a zero reference or it is mearly a negative number on a relative gauge. All we are talking about is scale. a manometer is a pressure guage that measures the pressure by measureing the weight of the column of air above it based on a reference weight on top of the column pushing down, this can be acheived in many different design methods. Hence, all manometers are pressure guages but all pressure guages are not manometers. So the pages for vacuum, pressure and all other types of pressure guages should be under the same article and reference in the table of contents, they all measure the same thing right? Brad —Preceding unsigned comment added by 68.54.220.29 ( talk) 00:26, 26 September 2007 (UTC)
Moved from article. The second paragrpah should at least start in a different way. Maybe it´s refering to a variation OF the the McLeod gauge. 201.213.220.35
Redhead gauge? Nude Gauge? MAN-O-METER? Who are you trying to fool? I'm going to mark this article as Adults Only, unless you at least add a note on how to pronounce manometer: ma-NOM-e-ter or MAN-o-meter, please use IPA too ☺. Jidanni ( talk) 02:36, 14 June 2008 (UTC)
"Most ion gauges come in two types: hot cathode and cold cathode, a third type exists which is more sensitive and expensive known as a spinning rotor gauge, but is not discussed here."
There are only two types of ion gauges, SRGs have nothing to do with ionization. They work purely mechanical. 141.84.69.20 ( talk) 22:17, 21 July 2008 (UTC)
Penning pressure gauge: In the text it is stated that the arrangement of magnetic field and electrodes is such that the ions have a pathlength of meters. This is incorrect. The arrangement is such that the electrons have a very long pathlength. In fact the arrangement is such that the electrons cannot reach the anode (+) unless they collide with gas atoms. So the plane of the anode ring is perndicular to the magnetic field. At both sides of the ring there is an anode plate. Kind regards, Karel van der Mast, kvdmast@solveigh.com — Preceding unsigned comment added by 77.169.8.250 ( talk) 09:59, 15 December 2011 (UTC)
The following sentence: "Thus a vacuum of 26 inHg gauge is equivalent to an absolute pressure of 30 inHg (typical atmospheric pressure) − 26 inHg = 4 inHg." seems slightly unacceptable to me. It should be expressed in (k)Pa. The inHg units could be added in parenthesis (if still useful for those who use those units). -- Mojca Miklavec ( talk) 08:08, 15 September 2013 (UTC)
they seem to cover identical topics-- 137.205.174.41 ( talk) 16:02, 19 August 2014 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Pressure measurement. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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We seem to be missing a few key pieces of information here. First, we have a section on static and dynamic pressures, but it is missing the third component of total pressure, which is hydrostatic pressure. Static pressure of course is pressure without relation to motion or gravity. Hydrostatic pressure is pressure related to gravity, whereas dynamic pressure is a pressure differential caused by flow. Hydrostatic pressure gauges of course use a liquid column, whereas aneroid gauges measure only the static pressure. Dynamic pressures occur in things like water hammer, the capture zone of a fan, or within centrifugal or axial-flow compressors, and are pressures caused by the motion of a fluid, which of course is difficult to measure at any single place but is measured as a differential between two or more spots.
Then I think we should also have a section about precision and errors, such as calibration, tolerances, graduation, and parallax errors. Bourdon gauges, for example, are great instruments, but the flexing of the tube over time leads to fatigue, hardening and stiffening of the metal, which affects its calibration. (Not unlike a torque wrench; every time you use it the calibration gets a little, tiny bit more off.) This effect is increased dramatically if the gauge is pushed beyond 80% of its maximum limit on a regular basis. This and other wear is accelerated even more if the gauge is subjected to a lot of shaking or vibration, which can also cause errors in reading the gauge. That's why some are filled with glycerin, to dampen vibration. Plus they are highly vulnerable to parallax error, which is caused when the eye of the observer is not perfectly in line with the needle and the marking. This is made worse if there is any distance between the needle and faceplate, although some gauges have mirrored faceplates to help prevent this. (If you can't see the needle's reflection, then you know you're in line. Note, parallax errors can occur in other gauges as well, such as a liquid column, caused by the thickness of the glass tube.) I'll work on this when I have a little more time. Zaereth ( talk) 18:56, 30 August 2019 (UTC)
wide overlap fgnievinski ( talk) 20:00, 9 March 2022 (UTC)