Advanced MicroSensors Corporation (AMS) is a semiconductor foundry, which develops and fabricates MEMS and spintronics solutions. AMS was founded in 1999 and is based in Massachusetts, USA.

AMS's magnetic sensor product line uses magnetoresistive (AMR, GMR) materials and magnetic tunnel junctions (MTJs). According to the company, their sensors exhibit excellent performance, and they outperform traditional Hall Effect devices with regard to size, power, sensitivity, accuracy and resolution.

In June 2011 Plures Technologies (which holds 95% in AMS) announced a merger with publicly traded CMSF Corporation.