Magnelab, Inc. Share: Manufacturing/Microelectronics Magnelab, Inc. Visit Website Request Info 600 Weaver Park Road Longmont, CO 80501 303-772-9100 303-772-9400 (fax) www.magnelab.com About Map About Manufacturer of flexible and split-core current sensors, AC transducers, and current transformers. What's Nearby? Distance: 5 10 15 20 25 50 mi.