The ADT 914 is a hand-held pneumatic pressure test pump, that is especially designed to generate pressure from 95% vacuum to 375 psi (25 bar). It can be used for calibrating pressure gauges, transmitters, or other pressure measuring instruments.The test pump has a high-quality screw press, which provides fine pressure adjustment, with an adjustment resolution up to10 Pa (0.1 mbar). It also has a specially designed shut-off valve which maintains the pressure stability during calibration. There is also a built-in gas-liquid isolator protecting the pump against moisture and dirt.Its lightweight design, only 3.3 lb, makes it convenient for transport. It requires only minimal maintenance.