Profile: RTEC Instruments specializes in tribology high tech instrument design & manufacturing. We offer products for nano-technology & traditional industries. Few of our products include tribometers, high temperature indenters, 3D profilometers, optical profilometer, atomic force microscope, mechanical property tester, and film thickness measurement & stress tester. RSA- 300 is used to calculate residual stress of thin & thick films. The tester measures residual stress by using non-contact lasers to precisely determine the radius of curvature of the sample. The platform offers a wide choice of lasers depending on accuracy & application. Multiple lasers can be accommodated on the same platform.