The MD215 is an economical replacement for legacy 2-inch counterdrum altimeters, commonly found on turboprop and advanced light-to-heavy business jet aircraft.
The MD215 combines the time-tested familiarity of a mechanical display with the reliability and value of electronic pressure sensing and servo-driven motors. It is a perfect form and fit replacement for traditional 2-inch counterdrum products, which can be expensive to repair or replace.
The optional internal battery provides one hour of emergency operation in the event of power loss to the instrument.

Avidyne AXP340 