Really glad to have accurate oil psi and temp! [It’s a] match with previous [EI] installs.
- Customer
Nathan V. from Alaska
- Aircraft
Cessna 172C
- 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.

Really glad to have accurate oil psi and temp! [It’s a] match with previous [EI] installs.
The FP-5l I had installed is easy to use and so accurate it’s almost scary. When I find a company that produces a product that good I stick with them. The fact that these instruments also look so darn good didn’t hurt either.
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.
I have worked with your products before and I like them.
[Customer Support was] very responsive and helpful. [I heard about EI through] advice from others. Just about everyone I asked about the CGR-30 loves it and your company.
Excellent customer service. Without a doubt the best aviation part I have purchased.
The layout and quality is impressive.
I have several EI units in my aircraft and have been very pleased with their reliability over the years. The other great part, besides the unit themselves, is the support from you all. Thank you for your support over the years… I chose IE for your reputation for quality and pricing. I have been very pleased with my units. My graphic engine analyzer, fuel flow meter, volt/amp meter, RPM and now Manifold gauge.
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.
Your company shares a good reputation!
Fantastic customer support!
Responsive customer service, kudos to [customer service].