Nice Instrument, all the electrical information I need in one place. [I chose EI for its] performance and price.
- Customer
David C. from the United Kingdom
- Aircraft
Scottish Aviation Bulldog
- EI Instrument
8am–4:30pm PST M–F
[mbhi location="Main"]
A-104 TR-1 Adapter
A-104 Adapter Plate
A-104
$128
Lead Time: Usually ships within 2–3 business days.

Nice Instrument, all the electrical information I need in one place. [I chose EI for its] performance and price.
Very complete and thorough packaging. Well-prepped wiring harnesses. Quick and efficient turnaround time. Great communication throughout the process.
Love my new engine monitoring system.
Easy to install, and the CGR was set up to my aircraft’s exact specifications.
Currently have multiple EI Instruments in our aircraft. Quality and reliability are key.
The CGR-30P is working great and it’s an outstanding addition to our avionics package.
A clear capable replacement for a cluster gauge. Vivid colors used which make it easy to see engine status at a glance.
Customer Service is far superior… with an excellent record of resolving … technical issues.
The older EI ultimate engine analyzer that came with my plane that I bought 7 years ago has always worked flawlessly.
Every person was willing to help me when I needed and the whole purchasing process was smooth. [And, E.I.] was recommended by my mechanic.
Easy to install and everything you need inside package. Good price, nice instrument and simple to use.
Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.