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Milk flow indicator: framed with index card (PDF)
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Description
TypeEphemera
Date of originalNo dateDescriptionA close-up of an early type of 'sight-glass' milk flow indicator, in-situ, illustrating the sight glass, tubing and teat cups.
The indicator had a dual purpose: firstly to provide a means for visual inspection of the state of the milk being taken, and secondly, as an indicator of the end of milking.
These early models relied on the milker keeping the indicator in view, but as technology progressed, enhancements such as the Ruakura developed 'photo-transistor circuit' (1972) which detected the level of milk-air flow negated the need for constant viewing.
The heyday of milking research at Ruakura (from the late 1940's onwards) saw the development of the 'Ruakura milk flow indicator', followed by the 'Ruakura milking machine' (1954).
Handwritten on the card are various photograph reference numbers.
This image shows the original placement on the index card, with the image in horizontal view (so it would fit on the standard size card).NoteSize of original12.6 x 20 cmCreatorRuakura photographerColourColourLanguageEnglish
Date of originalNo dateDescriptionA close-up of an early type of 'sight-glass' milk flow indicator, in-situ, illustrating the sight glass, tubing and teat cups.The indicator had a dual purpose: firstly to provide a means for visual inspection of the state of the milk being taken, and secondly, as an indicator of the end of milking.
These early models relied on the milker keeping the indicator in view, but as technology progressed, enhancements such as the Ruakura developed 'photo-transistor circuit' (1972) which detected the level of milk-air flow negated the need for constant viewing.
The heyday of milking research at Ruakura (from the late 1940's onwards) saw the development of the 'Ruakura milk flow indicator', followed by the 'Ruakura milking machine' (1954).
Handwritten on the card are various photograph reference numbers.
This image shows the original placement on the index card, with the image in horizontal view (so it would fit on the standard size card).
NoteHandwritten reference numbers: No. 12; Section 8A; 424/34. The latter is the photographer's reference number.
Size of original12.6 x 20 cmCreatorRuakura photographerColourColourLanguageEnglishDepicts or relates to
KeywordCowsDairiesMachineryMilkMilkingRuakuraSubject - GeographicRuakuraNode lookupMilk flow indicator: close-upMilk flow indicator: framed with index card (TIFF)Knowledge node lookupRuakura Campus
DairiesMachineryMilkMilkingRuakuraSubject - GeographicRuakuraNode lookupMilk flow indicator: close-upMilk flow indicator: framed with index card (TIFF)Knowledge node lookupRuakura CampusAdministration
FormatPDFDate of digital4th March 2016Technical descriptionType: Adobe Acrobat Document
Size: 231 KBLocation of hard copyRUA-AnnexOriginal file namein-7-0003
Date of digital4th March 2016Technical descriptionType: Adobe Acrobat DocumentSize: 231 KB
Location of hard copyRUA-AnnexOriginal file namein-7-0003Click on the image to add
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Ruakura photographer, Milk flow indicator: framed with index card (PDF). AgResearch, accessed 12/09/2026, https://agresearch.recollect.co.nz/nodes/view/265