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GEN-2 Digital Altimeter (RDAL)
Altimeter + Kollsman + Density Altitude + VSI + OAT + G-Meter
 
SHIPS WITHIN TWO WEEKS.
 
RADIANT's Digital Altimeter (RDAL) is built for pilots who want altitude to remain the primary visual focus. Its main dial presents altitude in a clear, conventional round-instrument style, using a short 10,000-foot hand and a long 1,000-foot hand, while the instrument’s right-side data stack adds digital altitude, Kollsman setting, outside air temperature, vertical speed, and density altitude in a compact, easy-to-scan layout. When enabled, the new G-meter also becomes part of the dial rotation.
 
Rather than acting like a simple one-function altimeter, RDAL provides the builder with a more capable altitude instrument while retaining the familiarity of a dedicated altitude presentation. It is especially attractive when altitude warrants the greatest visual emphasis, but supporting flight data still needs to be readily available in the same instrument.
 
The updated platform allows practical configuration from the front panel. RDAL supports inHg or hPa Kollsman units, °F or °C temperature display, temperature calibration, and G-meter enable/disable in setup. Kollsman is adjusted directly from the front controls, with a standard-pressure reset available from the panel.
 
An external temperature probe is included, and RDAL is available in both 2-1/4 inch and 3-1/8 inch versions for flexible installation.

GEN-2 Digital Altimeter (RDAL)

$149.95Price
Quantity

  • SHIPS WITHIN TWO WEEKS

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To Our Customers
REGISTER YOUR PRODUCT HERE and be notified when there are firmware updates.

We are in the business of offering innovative aircraft instruments for experimental aircraft flying, and backup / CO instruments for general aviation (non-TSO/non-PMA). The instruments from Radiant Technology are not designed to be used in applications where their failure would endanger safe flight or human life in any way. They are intended solely for use in VFR conditions. They are not certified to meet any Technical Standard Order, and are not produced under a Parts Manufacturing Authority (TSO / PMA). As a result, they are suitable only for use in experimental and ultralight aircraft, and in Light Sport Aircraft, if meeting the requirements of the respective manufacturer.

Support

If you need support for your Radiant instrument purchase, please contact us by email at support@radiantinstruments.com. Because of our small staff, we do not have a direct phone number.  We do our best to respond to emails as soon as possible. If you do not hear from us within 48 hours, please try again. You may also try kathy@radiantinstruments.com. Please check our our Warranty Information here.

Shipping Information

Since we offer innovative aircraft instruments, we often introduce new products for sale that are in the final engineering phase. Sometimes an engineering problem emerges in the final phase that delays our production runs. This means that if you are ordering a new product, we could be several weeks out from shipping. We try to keep our product pages up to date with shipping information.

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As of 2025, there are only two of us working Radiant instruments. We manufacture products in batches, and cycles take about a month. It is always best to order now and get on the list. We do charge your card at the time your order is placed.

 

We are ship by USPS Ground Advantage. We do not ship internationally, but our distributor, Aircraft Spruce does. Please order at https://www.aircraftspruce.com/. Search "RADIANT" and most of our products should pop up.

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Radiantly brilliant- truly affordable, made with pilots specifically in mind, and solving a problem that isn’t optional, but can easily cost 10x+ to mitigate. Thank you for everything you’ve done to make safer flying more accessible and affordable.

Ehren E. Turnstone

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