The Barfield 1811DAOA is an affordable, lightweight, self-contained Air Data / Pitot Staic test set and is perfect for leak testing aircraft pitot and static systems or on-board testing of altimeters and airspeed indicators. The test set utilizes 2 digital instruments (Altimeter and Airspeed, 20-650kts, 55k ft.) to conduct aircraft leak tests or instrument calibration testing. All 1811 series testers are designed with hand pumps and external pressure ports for delivering the required pressure and vacuum required for on-board testing. The Barfield 1811 series pitot/static testers are extremely practical for new facilities or those with a small budget.