A highly integrated multifunction calibrator featuring several patented technologies, the ADT222A is an ultra-compact, rugged, and easy to use hand-held device for sourcing, simulating and measuring pressure, temperature, and electrical signals. Its smartphone-like menu and interface make the operation simpler and easier. The ADT222A is ideal for calibrating, maintaining, and troubleshooting process instrumentations. Automation and documentation capabilities make the ADT 222A a turnkey solution.