Awesome product. Fast easy installation.
- Customer
Rodney E. from Georgia
- Aircraft
Cessna 172M Skyhawk
- EI Instrument
8am–4:30pm PST M–F
Open Now
A-104 TR-1 Adapter
A-104 Adapter Plate
A-104
$128
Lead Time: Usually ships within 2–3 business days.

Awesome product. Fast easy installation.
All looks very nice. [I chose E.I. because of] previous experience.
Very impressed with the clarity and readability of the CGR-30P gauge.
Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.
Much better quality with the bezel and buttons and knobs [vs. competition]. Also much easier to navigate and add fuel.
EI representatives… have been very helpful, truthful, and knowledgeable… We had no idea, that a few weeks later [after our purchase], we would need to have a Top Overhaul. What great timing! Having your engine monitor installed in our plane will hopefully help us keep it out of the shop for further engine repairs.
Electronics International is an exceptional company with exceptional products… Oregon company, great products and great people.
Best sales team.
Excellent installation instructions [&] recommend[ed] by others.
Very accurate readings! The “analog” style LED arc means at-a-glance tach readings that allow the pilot to keep his attention where it matters, not reading a gauge. The digital readout is great for maintenance checks and mag drop tests.
Great tech support. Someone always answers and gives accurate concise information.
I really enjoy your products [because they are] simple and easy to use and affordable.