My Cart



Model #: MD23

Flex Digital Counter Drum Encoding Altimeter

2-inch, 55k, Inches or millibars, LCD

Manufactured by Mid-Continent Instruments and Avionics
Customer Rating
(Based on 1 vote(s))
Availability List Price
New Outright
No core return required
Quantity Available: Lead times vary. Contact us for current information
or click here for availability of select products.
  • List Price: $5,500.00
Sign In Locate a Dealer
User-Selectable Features
    • Vertical speed indicator (ON/OFF)
    • 6-second vertical trend (ON/OFF)
    • Altitude target (ON/OFF)
    • Approach minimums alert (ON/OFF)
    • Barometric setting (millibars, hectopascals or inches of mercury)
  • Operating range up to 55,000 feet
  • Configurable altitude units (feet or meters)
  • Baro setting synchronized via ARINC 429
  • Encoding outputs via ARINC 429 and Gray Code
  • Standard 2-inch size
  • Lightweight — 0.4 lbs
  • Simple user interface — Single, push-and-turn control knob
  • Daylight readable LCD and smooth, high-resolution graphics
  • Manual external lighting control or built-in photocell for automatic dimming
  • SSEC curve customized to match primary flight displays (available)
  • Night Vision Imaging System (NVIS) compatible (available)
  • TSO certified (Design Assurance Level A)
  • Designed and built in Wichita, Kansas, USA
  • Two-year limited warranty
Power Input
10–32 VDC
0.14A @ 28 VDC; 4 watts nominal

Data Input
ARINC 429: Low or high speed; Labels 234, 235
Pressure: Absolute/Static (Quick Disconnect)

Data Output
ARINC 429: Low or high speed; Labels 203, 204, 212, 217, 234, 235
Gray Code

Operating Range
-1,500 to +55,000 feet

Units of Measure
Altitude: Feet or meters
Barometric Setting: Millibars (mb), hectopascals (hPa) or inches of mercury (in.Hg)

5, 14, or 28 VDC external control or internal photocell for automatic dimming

0.4 lbs (0.17 kg)

Rear panel mounted, (4) #6–32 screws, 2.25-inch round bezel

2.43 x 2.43 x 1.0 inches (61.7 x 61.7 x 25.4 millimeters)

Mating Connector
P/N 9019162-1: 26-pin, D-Sub electrical connector (Quick Disconnect)
P/N 9019162-2: Pneumatic fitting (Quick Disconnect)

FAA TSO certified to C10c, C106, C113b
RTCA DO-160G qualified
RTCA DO-178C qualified, Design Assurance Level (DAL) A

U.S. Patent 11,048,389
6420023 Installation Manual
6420023 Technical Drawing

Product Flier
MD23-215 Product Flier

User Guide
MD23-215 User Guide

Service Bulletins

Software Updates

Click the button below to be redirect to the FLEX® MD23 Standard Unit Software Update page.

Software Version 1.1.0
Average Rating:
(Based on 1 vote(s))
Rate this product: