Water is a scarce and precious commodity. Worldwide, the competition between domestic, commercial, industrial and agricultural sectors for clean water is intensifying and putting enormous pressure on fresh water resources. As a result, the price of water is increasing throughout the world. Pricing and metering are seen as important tools for more efficient use of water and water conservation. Metering also enables billing or revenue collection based on actual water consumption. The more valuable water gets, the more interested the market is in the accuracy and reliability of water meters.