Erickson Instruments is a small company building products for millimeter and submillimeter waves. It was founded in 2000 by Neal Erickson, a world leader in designs of submm frequency multipliers and other components. Its first product was a sensitive millimeter to submillimeter power meter, which has undergone many improvements over time and is now sold as the PM4. At this time the product line is limited but unique products with a high level of performance will be added in the future.