I like the 3.125″ format. Plus there are no hidden costs of probes you have to buy later…
- Customer
Anthony H. from Oregon
- Aircraft
Piper PA-18 Super Cub
- EI Instrument
8am–4:30pm PST M–F
Sorry, We’re Closed
A-102 Adapter Plate
A-102
$28
Lead Time: Usually ships within 2–3 business days.

I like the 3.125″ format. Plus there are no hidden costs of probes you have to buy later…
Safety and simplicity!
Some of the best customer service in the avionics network that I’ve had the pleasure of dealing with. [I chose EI because of the] features, simplicity, and the user-friendly platform.
EI tech support is the best.
Installed digital volt/amp gauge in PA 28-181. Great unit easy to install. Much better than original.
Nice product and good product support!
The older EI ultimate engine analyzer that came with my plane that I bought 7 years ago has always worked flawlessly.
While the installation is not quite done yet, I have seen the unit in my aircraft with the engine running and the monitor producing numbers. It looks very good and I cannot wait to go flying with it!
Always built well. Always dependable. Been using & relying on EI equip for over 35 years!
The [unit] is easy to read and quick to respond. I have multiple EI units and have had good experiences with all.
Easy install, good product. [I chose EI because of my] experience with [the] product.
You folks do a great job. Keep up the good work.