Preston Pressure - ALT-621 Indicators

Digital Altimeter and Airspeed Drop-In Replacement Indicators

The Alt-621 and ASP-621 indicators are designed specifically for replacing the analog indicators in pitot-static testers. The sensors are technician-proof, which contributes to reduced annual maintenance costs.

The indidcators are powered by an external 12 volt DC power adapter (included).

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

ASP-621 Features

Range for ASP-621-300: 20 – 300 Knots, 34 – 690 KPH, or 21 – 430 MPH

Range for ASP-621-500: 20 – 500 Knots, 34 – 975 KPH, or 21 – 575 MPH

Resolution: 1 MPH, 1 KPH, or 1 Knot

Direct factory price:

ASP-621-300: US$995.00
ASP-621-500: US$1250.00

Price includes operator manual, external power adapter, and calibration certificate.

Other Features:

Leak test feature: 2 minutes, selectable down to 30 seconds
The ALT-621 and ASP-621 indicators can be mounted in any position, at any angle.

Note: The ASP-621 indicators do NOT have the precision required to test RVSM altimeter systems.

ALT-621 Features

Range for ALT-621-35 : -1000 to 35,00 50,000 feet (-305 to 10,670 meters)

Range for ALT-621-50 : -1000 to 50,000 feet (-305 to 15,240 meters)

Resolution:

-2000 to 30,000 feet: 2-feet increments
Above 30,000 feet: 5-feet increments
All metric resolution is in 1-meter increments

Units Displayed: Feet, Meters , mBar, inHg

Sensor Accuracy: 0.03 %

Direct factory prices:

ALT-621-35: US$995.00
ALT-621-50: US$ 1250.00

Price includes operator manual, external power adapter, and calibration certificate.

Other Features:

Leak test feature: 2 minutes, selectable down to 30 seconds
VSI (vertical speed indicator) +/- 0 to 9900 ft/min
The ALT-621 and ASP-621 indicators can be mounted in any position, at any angle.

Note: The ALT-621 indicators do NOT have the precision required to test RVSM altimeter systems.

Specifications

Physical dimensions: 3.3” (8.4cm) wide x 3.5” (8.9cm) tall x 0.7” (1.8cm) deep on face; rear can is 3.15” (7.7cm) diameter x 3.05” (7.75cm) deep

Mounting hole pattern: 2.5” x 2.5” (6.35x6.35cm)

Display Size: 2.53” X 0.53” (64.5mm X 13.5mm)

ALT-621 Weight: 0.6 lb (270 grams)

ASP-621 Weight: 0.7 lb (320 grams)

Voltage: 12VDC, positive center

Current draw: 150 mA (with back light on)

Temperature range: 32-125 F (0-50 degrees C)

Note: The ALT-621 and ASP-621 indicators do NOT have the precision required to test RVSM altimeter systems.

The ALT-621 and ASP-621 indicators are NOT intended for flight or use in aircraft.

See ASP-621/ALT-621 Brochure

Download ASP-621/ALT-621 User Manual