VLSI Standards designs and manufactures an extensive array of calibration products and services to assist you with your calibration efforts. Our calibration products and services typically come in the form of standards and references. The primary difference between a calibration standard and a calibration reference is that calibration standards have direct traceability to a higher authority; whereas calibration references do not - often because no official calibration standard exists. Each type of calibration product is made to a rigorous set of internal specifications and serves as an excellent calibration artifact.

-  www.vlsistandards.com