Preston Pressure - PS-425 Pitot-Static Tester

Digital Air Data Testers for General Aviation

PS-425 Digital Pitot-Static Tester

The PS-425 Pitot-Static tester is designed specifically for the needs of general aviation. It is a low-maintenance, digital tester that is fully portable.

The PS-425 is powered by 8 internal alkaline batteries (included in purchase), which enable the test set to be used completely independent of any external power source. A connector is provided for an external 12 volt DC power adapter (included).

The PS-425 incorporates the altitude, VSI, and airspeed in one single display..

The PS-425 is designed and priced for non-RVSM markets, and includes two quick-connect hoses, 12 VDC power adapter, calibration certificate, and a limited 2-year warranty. This product is ideal for performing simple go/no-go leak tests, as well as for general use as a low-end pitot-static tester. It only requires an annual calibration, and the sensors are technician-proof, which contributes to reduced annual maintenance costs.

Review the following features and specifications. Then contact us to arrange for a purchase.

PS-425 Features

Truly portable, with internal alkaline batteries for over 60 days of continuous use (with display light off).
Altitude goes up to 35,000 feet and is displayed in 2 and 5-feet increments and includes a VSI - Vertical Speed Indicator
Displays airspeed in Knots
Selectable timing for Leak Check feature in Altimeter and Airspeed modes
Independent Vacuum and Pressure pumps and reservoirs
Lightweight - about 17 lbs
Lighted LCD display
Limited 2-year warranty

Direct factory PS-425 price: US$3500.00

Price includes operator manual, internal batteries, external 12 volt DC power adapter, and 2 hoses of 20 feet (about 6 meters) in length. Hoses have a quick-connector on tester ends, and brass 37 degree connectors on aircraft ends.

Available Options:

Swagelok quick connectors (standard)
Hansen quick connectors
Staubli quick connectors (add US$100)
Display in meters

Note: The PS-425 does NOT have the precision required to test RVSM altimeter systems.

PS-425 Specifications

Digital Altimeter:

Display Range : -1000 to 35,000 feet
Vacuum Pump Range: up to 35,000 feet

Resolution:

-1500 to 30000 feet: 2-feet increments
30000 and up: 5-feet increments
VSI 2 and 25 Ft/Min
Knots: 1 knot increments
Sensor Accuracy: approximately 0.03 %
Temperature range: 32 degrees F to 125 degrees F (0 C to 51 C)

Other Measurement Units:

VSI - vertical speed indicator 0-10000 fpm

Digital Airspeed:

Airspeed Range: 0-500 knots

Power Source:

External: 12 VDC (from a 110 or 220 VAC adaptor)
Internal: 12 VDC (8 internal batteries)

Physical Characteristics:

Physical Dimensions: 13”D X15.25”L X 9.5 ”H (33x39x24 cm)
Weight: approximately 17 lbs (7.7 Kg)

Display

The UNITS button is used to toggle between the two primary displays - altitude and knots, or altitude and VSI.

The LEAK CHECK will begin a 120 second timer, and the display will also show the gain or loss of altitude or airspeed experienced during the displayed time period.

If the operator wishes to select a different length of testing time, the Leak Check button may be pressed repeatedly, which will cause a reduction in the timer counter in 30-second increments. The timer will not toggle above 120 seconds nor under 30 seconds. Once the time is selected, press the Units button to start the timer.

The EXIT button is used to exit out of the leak check mode.

The LIGHT (sun) button will toggle the display backlight ON or OFF.

Altitude - The altitude is measured based on a reference point of 29.92 (sea level). This is pre-set at calibration and cannot be changed by the operator.

See PS-425 Brochure

Download PS-425 User Manual

Download PS-425 Manual Rev. 0 (Serial 110214 and lower)