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Altimeter + VSI Combo

Altimeter + VSI Combo


Introducing the RADIANT Altimeter + VSI Combo, a must-have for any aviation enthusiast or professional pilot. With a bright and clear display, the instrument is available as either 2 1/4" or 3 1/8 panel cutouts.


Aircraft Spruce has product in stock. We will not be shipping this product until late May.


Buy 2 1/4" at Aircraft Spruce

Buy 3 1/8" at Aircraft Spruce


  • Product Features

    This new Digital Altimeter has improvements in both value and price. It clearly displays altitude and vertical speed in both digital and replica analog format. We have also improved the internal numerical font representation, resulting in clear and visible digital numbers. Also improved is the size of the units, with availability for the larger 3 1/8 inch panel cutout. The overall thickness of the unit is also reduced to less than ½” (not including electrical connectors or bezel).


    In a nutshell, this new product is similar to, yet distinct from, our older GEN-2 Digital Altimeter.It has an improved screen representation but does not include a barb adapter or an external temperature probe.


    This chart compares the older GEN-2 Digital Altimeter with this new, value-driven instrument. 

    Feature GEN2 Digital Altimeter + VSI NEW Altimeter + VSI COMBO
    Part # RDAL-22-GEN2 RI-2024-1&2
    Price $299.95 $119.95
    Analog Dial Atlimeter? YES YES
    Digital Altimeter? YES YES
    Settable Kollsman Window? YES YES
    VSI Analog? NO YES (small dial)
    VSI Digital? YES YES 
    Altimeter Calibration? YES YES
    Density Altitude? YES NO
    Barb Adapter? YES NO (uses cabin pressure)
    Outside Air Temp (and Probe)? YES NO
    2 1/4" panel cutout? YES (enlarged cutout YES (enlarged cutout)
    3 18"   panel cutout? Adapter ring available,  not included YES (adapter ring is included)
    Range 0-20,000 ft/+/-2000 FPS SAME/SAME
    Dimable Optional potentiometer SAME/SAME

    In addition, RADIANT is increasing its warranty period to three years for this new instrument, allowing more time for experimental builders to design their instrument panels with factory warranty support.


    With clear and easy-to-read displays, this Altimeter + VSI Combo is designed to enhance cockpit visibility and improve situational awareness. Whether you're soaring through the skies for pleasure or conducting professional flights, this device is an essential tool for safer and more efficient aviation. 

  • Specifications

    • Unit weight of approximately 2 ounces (~57 grams).
    • Units are available for standard 2 ¼” or 3 1/8” panel cutouts
    • Power Requirement is 6.5 to 14 volts @ 125ma. These units will run off a 9-volt alkaline battery. The power must be externally switched, EG, through master avionics power switch.
    • For use in experimental and ultralight aircraft, may also be used in LSA aircraft with manufacturer approval.
    • Cases are 3D printed in black nylon.
    • Dimmable. (External potentiometer NOT included).
    • NEW 3 year warranty, allows more time to build panel and test
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