Very easy to install and directions were straight-forward.
- Customer
Paul H. from Oklahoma
- Aircraft
Piper PA-28-151 Cherokee Warrior
- 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 easy to install and directions were straight-forward.
[Customer service] is great!
Good value and functionality. I’ve used your instruments on multiple aircraft thru the years with no issues. These are a nice upgrade over the original instruments in most older aircraft.
Sharp-looking gauges. [I chose EI because of your] reputation.
Excellent customer service. Without a doubt the best aviation part I have purchased.
Your company shares a good reputation!
EI has the best customer service of any company that I’ve ever dealt with.
Really glad to have accurate oil psi and temp! [It’s a] match with previous [EI] installs.
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.
I like being able to get a hold of a technical expert immediately when calling into the main EI phone number… The build quality of the sensors, display unit and EDC seem very good… I appreciate the business practices of EI and have had an EI R-1 Tachometer which has worked flawlessly for the past 20 years.
The [unit] is easy to read and quick to respond. I have multiple EI units and have had good experiences with all.
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.