Founded in 1976, RTD Company is a USA corporation that designs and manufactures sensors in Ham Lake, Minn. A subsidiary of Cambridge Technologies Inc., it develops custom temperature sensors for some of the largest companies in the world, from manufacturers of motors to medical devices. The firm serves a range of industries including, aerospace; bearing drives; food and dairy; heating; ventilation and air conditioning (HVAC); medical; automotive, original equipment manufacturer (OEM), pharmaceuticals and process industry. RTD Company serves the core discipline areas of fine wire windings, wire wound RTDs, NIST traceable calibrations and custom sensor designs.