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The section titled hydrometer used in an actual historical context 1854 contains text copied directly from the book "The Physical Geography of the Sea" (as noted by the contributor) but uses words like "I" and "us", which isn't the appropriate tone to use for an encyclopedic entry. Could someone re-write the section?
Could be heavily pruned if you ask me. I would say most of the information in that section is totally irrelevant. Gamsarah 15:35, 29 October 2006 (UTC)
I'm confused by the use of the word weight in this article, does it mean mass? The article talks of grammes per cubic centimeter, but gramme is a measure of mass not weight. Alun 07:17, 22 February 2006 (UTC)
I reverted this addition because it is rather confusing:
What is "the natural frequency of a sample compared to pure water"??? What's the difference between specific gravity and density? And the description is missing a rudimentary explanation of how it works - or it might be in the "natural frequency" which is unclear to me. Han-Kwang 18:03, 5 April 2007 (UTC)
Jeroboam Bramblejam writes: Thank you, Han-Kwang, for your careful reading of my contribution~ I will clarify it at my earliest opportunity~ Best wishes, jeroboambramblejam
Maybe you guys (whoever's editing this page) can make instructions to build one. That would really help. I remember when I had to do a project about hydrometers. What a nightmare!
Thanks, Jetster (Jetsterjinx) —Preceding unsigned comment added by 137.132.3.7 ( talk) 13:24, 30 October 2007 (UTC)
There's a rather slim and so-so article on aerometer which seems to exactly overlap with hydrometer. Merge? Pdch ( talk) 15:00, 19 January 2008 (UTC)
Do not merge with 'hydrometer'. Hydrometers are used only with liquids while pycnometers are used with liquids and solids. Hydrometers belong to the buoyancy methods while pycnometers don't —Preceding unsigned comment added by 158.169.9.14 ( talk) 10:08, 19 November 2009 (UTC)
Googling this as a phrase produces no hits at all; neither does "oscillating hydrometer". Could we have a reference? Mangoe ( talk) 15:12, 1 May 2008 (UTC)
Jeroboambramblejam ( talk) 16:15, 1 May 2008 (UTC) The technical manual for the Mettler-Toledo "Densito 30PX" says: "The instrument uses the oscillating body method." There is no such thing as an "oscillating hydromter"; If you notice a simple typo, just correct it, but please be certain of your spelling... "hydromter" is a misspelling of hydrometer. Moreover, I did not refer to an 'oscillating hydrometer', but rather an 'oscillating body hydrometer'. I would be happy to elaborate on the technology, but I didn't want to interrupt the narrative; I simply wanted to introduce the fact of a newer method and instrument. I can fax the manual to interested parties. I will revert the erasure tomorrow unless a valid objection is raised. Regards, jeroboambramblejam
Jeroboambramblejam ( talk) 00:15, 3 May 2008 (UTC) I respect the editors' preference to reserve the term 'hydrometer' for a specific manifestation of a device to measure the density or specific gravity of liquids. Perhaps "An hygrometer is one of several instruments that can be used to measure the density or specific gravity of liquids..." would be an appropriate way of introducing the fact that the hydrometer has modern - and much more accurate and versatile - incarnations. The product I mentioned has a specification of +/- 0.001 g/cm3 and automatic temperature compensation of +/- 0.36 deg F. Best wishes, jeroboambramblejam
Jeroboambramblejam ( talk) 17:57, 3 May 2008 (UTC) My bad... I typed "hygrometer" rather than 'hydrometer', both with which I am familiar. Secondly, I have already agreed to the objection that the densitometer is not an hydrometer. However, like the hydrometer, it is an instrument used to determine the density of liquids. I suggest: 1) Add 'Densitometer' to the 'see also' list; the 'Density' and 'Oscillating U-tube' entry headings do not inform the reader that they might link to an alternative, versatile and high precision instrument which is used for the same purpose as hydrometers. 2) Reorganize the rather cryptic 'Oscillating U-tube' entry under 'Densitometer', and add a photo of the hand-held Mettler-Toledo (or similar) product to indicate a portability not suggested by the depicted tabletop model. Also, other densitometer designs that Venny85 mentions ("...just another method of measuring density out of the many possible ways. Its a novel technique but in no way more modern than the others.") would then have a place in the entry. Regards, jeroboambramblejam
Jeroboambramblejam ( talk) 01:12, 5 May 2008 (UTC) Technical terminology can get complex. We might take a hint from the Mass Spectrometer and call it a "Mass Densitometer" - which would distinguish it from the photographic film 'optical' densitometer, and encompass variations on the U-tube approach. I can take the photo, and a macro that shows the modified U-tube element that the manufacturer calls the "oscillating body" - actually, a triply bent glass tube which forms a tuning fork arrangement of a pair of U-tubes; each U-tube is affixed with a metal element at the outside of its bend, each of which interacts with what appears to be a magnetic head taken straight from a cassette tape recorder.
This article talk page was automatically added with {{ WikiProject Food and drink}} banner as it falls under Category:Food or one of its subcategories. If you find this addition an error, Kindly undo the changes and update the inappropriate categories if needed. The bot was instructed to tagg these articles upon consenus from WikiProject Food and drink. You can find the related request for tagging here . Maximum and careful attention was done to avoid any wrongly tagging any categories , but mistakes may happen... If you have concerns , please inform on the project talk page -- TinucherianBot ( talk) 04:22, 4 July 2008 (UTC)
A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids; that is, the ratio of the density of the liquid to the density of water. Doesn't a actually hydrometer measure actual density? Most of the scales are defined with respect to a standard density of water, yeah... but it doesn't actually compare the density of the substance being measured with a sample of water; and the readings won't change with temperature based on changes in the density of water in that temperature [only with changes to the actual density of the substance as it expands] except in so far as the hydrometer itself expands. -- Random832 ( contribs) 01:05, 27 July 2008 (UTC)
How does a swing-arm hydrometer work? -- Random832 ( contribs) 01:13, 27 July 2008 (UTC)
I have heard of a device that is quite similar to the hydrometer but measures the density of a sample placed in the bulb. In that application the sample was potatoes and the density depended on the starch content and thus related to ripening and the gastronomic quality. In order for this to work the bulb should be a cage or other device permitting the sample to be immersed in a standard liquid (typically water) and the sample quantity must also be standardised (typically a certain mass of potatoes) and the sample should of course be clean so that the potatoes are first washed. If someone knows more about this device, e.g. its name, please include it or link to that device! —Preceding unsigned comment added by 90.239.105.50 ( talk) 21:21, 18 July 2010 (UTC)
Please see Talk:Brix#Rename.3F for a discussion about a possible new article for Hydrometer scales. Biscuittin ( talk) 09:33, 16 June 2009 (UTC)
This [1] says the instrument in the diagram is a hydrometer. It has a fixed weight and variable volume of immersion due to the volume of the stem. The historic areometer had a fixed volume and adjusted the weights like balancing a scale. And an aerometer seems to be either an instrument for measuring the density of gases, or a machine for ventilating mines. -- Wtshymanski ( talk) 13:39, 27 June 2011 (UTC)
"Aerometer" incorrectly redirects here, but I do not know how to fix it. James K. 71.50.19.103 ( talk) 07:35, 25 July 2011 (UTC)
I'm surprised that this article does not mention the hydrometer's use in measuring the specific gravity of freshwater or saltwater marine aquariums, especially considering that this is no doubt the most popular home-consumer use for the device. — Preceding unsigned comment added by 76.110.212.12 ( talk) 02:00, 18 August 2011 (UTC)
The first reference is a dead link, the second link is unreliable.
2602:306:2420:8780:5DB7:F5D:36F7:D2B4 ( talk) 08:13, 26 November 2013 (UTC)
Hello fellow Wikipedians,
I have just modified 3 external links on Hydrometer. 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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The history section is a mess. The only reference to modern history claims (without giving a reference) that the hydrometer appears in the works of Jacques Alexandre César Charles, who was born in 1746, but a London instrument maker, John Clarke, was marketing hydrometers in 1725, when they were in use by the Excise authorities to measure the strengths of spirits, and there is extensive evidece of their use by brewers from the 1770s. Further, under 'saccarometer, it claims that Thomas Thomson invented the saccharometer. As he was only nine years old in 1784 when John Richardson published Statical Estimates of the Materials of Brewing, which introduced the term 'saccharometer', this cannot be correct. Zythophile ( talk) 08:46, 6 April 2018 (UTC)
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The section titled hydrometer used in an actual historical context 1854 contains text copied directly from the book "The Physical Geography of the Sea" (as noted by the contributor) but uses words like "I" and "us", which isn't the appropriate tone to use for an encyclopedic entry. Could someone re-write the section?
Could be heavily pruned if you ask me. I would say most of the information in that section is totally irrelevant. Gamsarah 15:35, 29 October 2006 (UTC)
I'm confused by the use of the word weight in this article, does it mean mass? The article talks of grammes per cubic centimeter, but gramme is a measure of mass not weight. Alun 07:17, 22 February 2006 (UTC)
I reverted this addition because it is rather confusing:
What is "the natural frequency of a sample compared to pure water"??? What's the difference between specific gravity and density? And the description is missing a rudimentary explanation of how it works - or it might be in the "natural frequency" which is unclear to me. Han-Kwang 18:03, 5 April 2007 (UTC)
Jeroboam Bramblejam writes: Thank you, Han-Kwang, for your careful reading of my contribution~ I will clarify it at my earliest opportunity~ Best wishes, jeroboambramblejam
Maybe you guys (whoever's editing this page) can make instructions to build one. That would really help. I remember when I had to do a project about hydrometers. What a nightmare!
Thanks, Jetster (Jetsterjinx) —Preceding unsigned comment added by 137.132.3.7 ( talk) 13:24, 30 October 2007 (UTC)
There's a rather slim and so-so article on aerometer which seems to exactly overlap with hydrometer. Merge? Pdch ( talk) 15:00, 19 January 2008 (UTC)
Do not merge with 'hydrometer'. Hydrometers are used only with liquids while pycnometers are used with liquids and solids. Hydrometers belong to the buoyancy methods while pycnometers don't —Preceding unsigned comment added by 158.169.9.14 ( talk) 10:08, 19 November 2009 (UTC)
Googling this as a phrase produces no hits at all; neither does "oscillating hydrometer". Could we have a reference? Mangoe ( talk) 15:12, 1 May 2008 (UTC)
Jeroboambramblejam ( talk) 16:15, 1 May 2008 (UTC) The technical manual for the Mettler-Toledo "Densito 30PX" says: "The instrument uses the oscillating body method." There is no such thing as an "oscillating hydromter"; If you notice a simple typo, just correct it, but please be certain of your spelling... "hydromter" is a misspelling of hydrometer. Moreover, I did not refer to an 'oscillating hydrometer', but rather an 'oscillating body hydrometer'. I would be happy to elaborate on the technology, but I didn't want to interrupt the narrative; I simply wanted to introduce the fact of a newer method and instrument. I can fax the manual to interested parties. I will revert the erasure tomorrow unless a valid objection is raised. Regards, jeroboambramblejam
Jeroboambramblejam ( talk) 00:15, 3 May 2008 (UTC) I respect the editors' preference to reserve the term 'hydrometer' for a specific manifestation of a device to measure the density or specific gravity of liquids. Perhaps "An hygrometer is one of several instruments that can be used to measure the density or specific gravity of liquids..." would be an appropriate way of introducing the fact that the hydrometer has modern - and much more accurate and versatile - incarnations. The product I mentioned has a specification of +/- 0.001 g/cm3 and automatic temperature compensation of +/- 0.36 deg F. Best wishes, jeroboambramblejam
Jeroboambramblejam ( talk) 17:57, 3 May 2008 (UTC) My bad... I typed "hygrometer" rather than 'hydrometer', both with which I am familiar. Secondly, I have already agreed to the objection that the densitometer is not an hydrometer. However, like the hydrometer, it is an instrument used to determine the density of liquids. I suggest: 1) Add 'Densitometer' to the 'see also' list; the 'Density' and 'Oscillating U-tube' entry headings do not inform the reader that they might link to an alternative, versatile and high precision instrument which is used for the same purpose as hydrometers. 2) Reorganize the rather cryptic 'Oscillating U-tube' entry under 'Densitometer', and add a photo of the hand-held Mettler-Toledo (or similar) product to indicate a portability not suggested by the depicted tabletop model. Also, other densitometer designs that Venny85 mentions ("...just another method of measuring density out of the many possible ways. Its a novel technique but in no way more modern than the others.") would then have a place in the entry. Regards, jeroboambramblejam
Jeroboambramblejam ( talk) 01:12, 5 May 2008 (UTC) Technical terminology can get complex. We might take a hint from the Mass Spectrometer and call it a "Mass Densitometer" - which would distinguish it from the photographic film 'optical' densitometer, and encompass variations on the U-tube approach. I can take the photo, and a macro that shows the modified U-tube element that the manufacturer calls the "oscillating body" - actually, a triply bent glass tube which forms a tuning fork arrangement of a pair of U-tubes; each U-tube is affixed with a metal element at the outside of its bend, each of which interacts with what appears to be a magnetic head taken straight from a cassette tape recorder.
This article talk page was automatically added with {{ WikiProject Food and drink}} banner as it falls under Category:Food or one of its subcategories. If you find this addition an error, Kindly undo the changes and update the inappropriate categories if needed. The bot was instructed to tagg these articles upon consenus from WikiProject Food and drink. You can find the related request for tagging here . Maximum and careful attention was done to avoid any wrongly tagging any categories , but mistakes may happen... If you have concerns , please inform on the project talk page -- TinucherianBot ( talk) 04:22, 4 July 2008 (UTC)
A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids; that is, the ratio of the density of the liquid to the density of water. Doesn't a actually hydrometer measure actual density? Most of the scales are defined with respect to a standard density of water, yeah... but it doesn't actually compare the density of the substance being measured with a sample of water; and the readings won't change with temperature based on changes in the density of water in that temperature [only with changes to the actual density of the substance as it expands] except in so far as the hydrometer itself expands. -- Random832 ( contribs) 01:05, 27 July 2008 (UTC)
How does a swing-arm hydrometer work? -- Random832 ( contribs) 01:13, 27 July 2008 (UTC)
I have heard of a device that is quite similar to the hydrometer but measures the density of a sample placed in the bulb. In that application the sample was potatoes and the density depended on the starch content and thus related to ripening and the gastronomic quality. In order for this to work the bulb should be a cage or other device permitting the sample to be immersed in a standard liquid (typically water) and the sample quantity must also be standardised (typically a certain mass of potatoes) and the sample should of course be clean so that the potatoes are first washed. If someone knows more about this device, e.g. its name, please include it or link to that device! —Preceding unsigned comment added by 90.239.105.50 ( talk) 21:21, 18 July 2010 (UTC)
Please see Talk:Brix#Rename.3F for a discussion about a possible new article for Hydrometer scales. Biscuittin ( talk) 09:33, 16 June 2009 (UTC)
This [1] says the instrument in the diagram is a hydrometer. It has a fixed weight and variable volume of immersion due to the volume of the stem. The historic areometer had a fixed volume and adjusted the weights like balancing a scale. And an aerometer seems to be either an instrument for measuring the density of gases, or a machine for ventilating mines. -- Wtshymanski ( talk) 13:39, 27 June 2011 (UTC)
"Aerometer" incorrectly redirects here, but I do not know how to fix it. James K. 71.50.19.103 ( talk) 07:35, 25 July 2011 (UTC)
I'm surprised that this article does not mention the hydrometer's use in measuring the specific gravity of freshwater or saltwater marine aquariums, especially considering that this is no doubt the most popular home-consumer use for the device. — Preceding unsigned comment added by 76.110.212.12 ( talk) 02:00, 18 August 2011 (UTC)
The first reference is a dead link, the second link is unreliable.
2602:306:2420:8780:5DB7:F5D:36F7:D2B4 ( talk) 08:13, 26 November 2013 (UTC)
Hello fellow Wikipedians,
I have just modified 3 external links on Hydrometer. 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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have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 10:36, 9 November 2017 (UTC)
The history section is a mess. The only reference to modern history claims (without giving a reference) that the hydrometer appears in the works of Jacques Alexandre César Charles, who was born in 1746, but a London instrument maker, John Clarke, was marketing hydrometers in 1725, when they were in use by the Excise authorities to measure the strengths of spirits, and there is extensive evidece of their use by brewers from the 1770s. Further, under 'saccarometer, it claims that Thomas Thomson invented the saccharometer. As he was only nine years old in 1784 when John Richardson published Statical Estimates of the Materials of Brewing, which introduced the term 'saccharometer', this cannot be correct. Zythophile ( talk) 08:46, 6 April 2018 (UTC)