The performance of our sensors and their unrivalled levels of accuracy and reliability provide you with the peace of mind that the pitot-static system on your aircraft is functioning as it should when aircraft return to service. In addition, the automated operation and simple user interface support technicians in returning to work and re-familiarizing themselves with the testing process.
Druck’s 500 series ADTS are equipped with TERPS (Trench etched Resonant Pressure Sensor) technology delivering unprecedented levels of accuracy and performance in the field. This results in real world accuracies of better than 12 ft at 41,000 ft, 7ft at 29,000 ft and 2 ft at sea level, well within the 80ft Reduced Vertical Separation Minimum (RVSM) allowance for an aircraft. Our customers tell us this performance is market leading and results in peace of mind for the technicians and airlines alike.
At Druck we always include the precision, the calibration expanded uncertainty and the drift into the accuracy values we provide. This ensures we know exactly what the uncertainty impact is on the RVSM allowance of the aircraft. Not all pitot-static test set manufacturers follow this best practice of providing all sources of measurement uncertainty however, so before purchasing any pitot-static tester, the buyer should investigate whether the accuracy value stated includes drift for the recalibration period, temperature effects, calibration standard uncertainty and control stability.
In the graph below we show the typical drift for our TERPS technology and compare its drift performance over time against the drift performance claimed and achieved by other instrument manufacturers. Whilst Druck’s specification includes a 20 ppm FS drift per annum and 30 ppm drift over 18 months, Druck has observed that the drift performance of Druck’s TERPS® over time outperforms this specification significantly. It is this stability that allows us to offer standard 15 month calibration periods on all our 55X series (with an option to extend to 18 months), and 12 months on our 542 series (with an option to extend to 15 months). This extended calibration period reduces the cost of ownership through less calibrations being required (4 calibrations in 5 years for a 55X series) but also less ADTS’s being needed in the fleet to cover while units are away being calibrated.