Profile: Tecray Ltd. provides test engineering software and test stand development as consultant advice or test engineer contractor to aid in prototyping, assembly & test operations. We can assist in piezoelectric applications with a breadth of experience including piezoelectric motors & micromotors, optical interferometers, nanometer precision positioning, and developing custom assembly machines. MST (micro -systems technology) or MEMS (micro-electro-mechanical systems) is the engineering of small scale sensors or actuator chips with features of the order of micrometers. These are made generally using silicon micromachining, but with the addition of other materials.