AquaMaster meters help protect wetlands
February 1st 2007 Mining company RWE Power has ordered 25 ABB AquaMaster electromagnetic water meters to help preserve groundwater based marshed and wetlands around its German coal mines. The meters monitor the amount of water pumped back into the nature reserves from RWE's open cast lignite mines,where constant pumping is needed to control groundwater levels. RWE previously used mechanical flowmeters to measure the water pumped back to the marshes. The need for more accurate measurements of water flows and automatic data monitoring made electronic flowmeters an attractive proposition.ABB's meters were ideal because they are fitted with their own battery power supply, so they can be installed in locations where no mains supply is available. Whenever RWE maintenance engineers find that a mechanical meter has failed, they now replace it with an AquaMaster as standard. With a measurement accuracy of ±0.5% over a turndown range of 1000:1, the AquaMaster can also deliver accurate measurement even at extremely low flat rates, compared with their mechanical counterparts which can only offer an accuracy of ±2%. More articles from ABB Limited: | 
