Electro-Med manufactures Line Frequency Monitor. Electro-Med supplies electronic display boards, instruments and equipment for industrial applications. Line Frequency Monitor measures line frequency accurately up to 2 decimal places. Line Frequency Monitor displays the information in the size from 0.5 inch to 4 inches. This line frequency monitor is also available with high and low frequency set points. This equipment is suitable for industrial applications and is applicable for working in stringent environmental conditions.