An Experimental Study about Effect of Magnetic Field to Water Meter for Remote Reading

Water meters for remote reading are legal metrology equipment and are managed in accordance with Measures act and technical regulation in Korea. In technical regulation, the same as OIML (International Organization for Legal Metrology) R 49-1, -2, -3, anisotropic ferrite magnets are applied to test measurement errors caused by magnetic fields. Recently, neodymium magnets have been used for industrial purposes and become widespread. Therefore, this study suggests an alternative to improve the shielding reliability of water meters for remote reading through analysis of magnetic field test by different magnet material, type, size and shape.