The Druck DPI 802 pressure loop calibrator provides simultaneous pressure and mA measurement for transmitter and loop maintenance. It is designed for technicians that are in the field performing work such as calibration and repair service or equipment installation and maintenance, as well as technicians in a variety of manufacturing environments. A Druck DPI 802 pressure indicator and loop calibrator used in conjunction with a pressure source from the Druck range of hand pumps provides a simple and cost effective calibrator for gauges, indicators, and recorders.