The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
- Customer
Daniel N. From California
- Aircraft
Cessna 175 Skylark
- EI Instrument
8am–4:30pm PST M–F
Sorry, We’re Closed
CP-1A LED Intensity Control Pot
-
$72
Lead Time: Usually ships within 2–3 business days.

The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
Great product. So easy to read compared to the originals.
Good reviews and I don’t have to modify my panel. Additionally, the reps at Oshkosh were extremely helpful and answered all my questions.
Installing [EI’s FP-5L] in my RV 6. . . owned an FP-5L 6 years ago in a Cessna 206 on floats in a commercial operation in Alaska. Getting every ounce of payload, and coming home across Cook Inlet with the Cessna gas gauges near or on empty, I spent a lot of time explaining the benefits of the Fuel flow gauge… and reassured my passengers there were 12 gallons of fuel on board. I’m a believer…
All looks very nice. [I chose E.I. because of] previous experience.
Just about to begin flying with the EI MVP-50P, so no in-flight feedback yet. But I did study the user manual, then sat in my plane going through the screens, menus, etc. It was very easy and intuitive to locate everything, so I’m confident that it will become second nature to do this in flight… Very happy with all interactions with EI.
My mechanic said that your product was very good, and he was correct.
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.
Straightforward installation instructions, great wiring harness. Quick answers from Tech Support.
Always a pleasure to do business with EI. Products ship rapidly. I have been using your products for 20+ years.
The reviews online were very good. Customer service has been great.