DeLaval Voluntary Milking System:

The Voluntary Milking System (VMS) allows cows to decide when to be milked, and gives dairy farmers a more independent lifestyle, free from regular milkings, the company says.

DeLaval was started in 1883 by Swedish inventor Gustaf de Laval. It sells a variety of dairy supply and “cow comfort” products aimed at increasing dairy yields. It claims to lead the automatic milking machine market, with a 53 percent share, and says it has sold more than 1,000 VMSs, in all European countries, Canada, Japan, and Mexico.

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