Electromagnetic flow meter

Claim 1

An electromagnetic flow meter interposable between ends of upstream and downstream pipes conveying a fluid whose flow rate is to be measured, said flow meter comprising: a measuring pipe made of non-magnetic material, said fluid flowing through said measuring pipe along the axis of said measuring pipe; a pair of electrodes for picking up electricity generated depending on the flow rate of the fluid in said measuring pipe, said electrodes mounted in said measuring pipe; first and second magnetic flux generating units for generating magnetic flux in said measuring pipe, said flux generating units being arranged facing toward and being separated by gaps from the outer surface of said measuring pipe; a first casing unit enclosing said first magnetic flux generating unit and a first circumferential portion of said measuring pipe, said first magnetic flux generating unit being adjustably secured to said first casing unit; means, including a plurality of spacing members associated with at least one of said measuring pipe and said first casing unit, for positioning said first casing unit in spaced relationship with respect to said measuring pipe; and a second casing unit enclosing said second magnetic flux generating unit and a second circumferential portion of said measuring pipe, said first and second circumferential portions representing the entire circumference of said measuring pipe, said second magnetic flux generating unit being adjustably secured to said second casing unit, and said second casing unit facing toward said measuring pipe and forming a gap therebetween.