Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.
- Customer
Benjamin T. from South Carolina
- Aircraft
Piper PA-28-181 Archer II
- EI Instrument
8am–4:30pm PST M–F
Sorry, We’re Closed
CP-1A LED Intensity Control Pot
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$72
Lead Time: Usually ships within 2–3 business days.

Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.
Sharp-looking gauges. [I chose EI because of your] reputation.
Nice bright display.
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.
Easiest company to deal with and an awesome product! Price, Certified for Primary, and Features.
Installation went great. The Fuel Flow is dead on.
The older EI ultimate engine analyzer that came with my plane that I bought 7 years ago has always worked flawlessly.
Great Product, that provides a lot of very helpful engine data in an easy to use and see display! We are already finding cylinder cooling issues that we would’ve never known about before, and probably explains why we’ve had to replace that specific cylinder in the past. EI customer service on questions on how we wanted to set ours up was very helpful and positive. The CGR-30 had quite a few positive reviews online from other users.
Currently have multiple EI Instruments in our aircraft. Quality and reliability are key.
I won a FP-[5]L and had it installed in my c150. I was/am impressed with the accuracy and ease of operation of the FP. I wanted a new tach and I trust (and verified) that the EI R-1… would be my best choice. I am not a rich man. These instruments are affordable and incredibly accurate. Already planning my next buy from EI.
Very complete and thorough packaging. Well-prepped wiring harnesses. Quick and efficient turnaround time. Great communication throughout the process.
Excellent customer service. Without a doubt the best aviation part I have purchased.