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Milk flow indicator: framed with index card (TIFF)
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Sub-ClassIndex card
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).Size 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).
Size of original12.6 x 20 cmCreatorRuakura photographerColourColourLanguageEnglishDepicts or relates to
KeywordCowsDairiesMachineryMilkMilkingRuakuraSubject - GeographicRuakuraNode lookupMilk flow indicator: close-upMilk flow indicator: framed with index card (PDF)Knowledge node lookupRuakura Campus
DairiesMachineryMilkMilkingRuakuraSubject - GeographicRuakuraNode lookupMilk flow indicator: close-upMilk flow indicator: framed with index card (PDF)Knowledge node lookupRuakura CampusAdministration
FormatTIFFDate of digital2nd March 2016Technical descriptionEquipment: Fujitsu FI5750c
Software used: Adobe Photoshop CC 2015
Program name: Pixel translations Inc., PIXTFF
Dimensions: H 1496 x W 2428 pixels
Horizontal resolution: 300 dpi
Vertical resolution: 300 dpi
Bit depth: 24
Compression: LZW
Resolution unit: 2
Colour representation: Uncalibrated
Photometric interpretation: RGB
EXIF version: 0221Location of hard copyRUA-AnnexOriginal file namein-7-0003aa
Date of digital2nd March 2016Technical descriptionEquipment: Fujitsu FI5750cSoftware used: Adobe Photoshop CC 2015
Program name: Pixel translations Inc., PIXTFF
Dimensions: H 1496 x W 2428 pixels
Horizontal resolution: 300 dpi
Vertical resolution: 300 dpi
Bit depth: 24
Compression: LZW
Resolution unit: 2
Colour representation: Uncalibrated
Photometric interpretation: RGB
EXIF version: 0221
Location of hard copyRUA-AnnexOriginal file namein-7-0003aaClick on the image to add
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Ruakura photographer, Milk flow indicator: framed with index card (TIFF). AgResearch, accessed 28/06/2026, https://agresearch.recollect.co.nz/nodes/view/282