Flow measurement is an everyday event. Whether you are Ÿlling up a car with petrol (gasoline) or wanting to know how much water the garden sprinkler is consuming, a žowmeter is required. Similarly, it is also di¬cult to think of a sector of industry in which a žowmeter of one type or another does not play a part. œe world market in žowmeters is expected to grow steadily for the foreseeable future. œe value of product being measured by these meters is also very large. For example, in the United Kingdom alone, it was estimated that in 1994, the value of crude oil produced was worth $15 billion.