Founded in 1980, ECS Inc. International has become one of the world's most recognized and experienced manufacturers of frequency control management products. From cylindrical tuning fork crystals to high-stability oven-controlled oscillators, ECS Inc. offers the industry's most comprehensive line of frequency control devices. ISO9001/2000 and QS-9000 certification, as well as the pursuit of other global certifications, make ECS Inc. your trusted global partner for frequency management products. ECS is currently undergoing TS16949: 2002 registration to replace the current QS-9000 certification.