Mine's from Index Instruments in Cambridge. http://www.indexinstruments.com/medi...er_leaflet.pdf

The label says REF-102C, which seems to be a "cutting oil" version of the REF-102. The label on the box says "0-18% cutting oil" and the website seems to suggest that's possibly also 0-18 Brix, although they don't actually recognise the REF-102C as such. RS sell a version which talks of "0-18 Brix" and also "0-18% cutting fluid". Remarkable coincidence?

Bottom line is that Brix and % cutting fluid are being used interchangeably. There's no obvious explanation why that might be, given that Brix is generally used for alcohol. We may never know!