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
A-102 Adapter Plate
A-102
$28
Lead Time: Usually ships within 2–3 business days.

The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
Always very friendly and knowledgeable staff. Over time, I have purchased six different EI instruments for the two planes I own. The instruments are easy to install, very accurate, and dependable. EI has very stable and easy-to-operate instruments.
Good engineering support.
Works great!
Great… price [&] support
Easy install, good product. [I chose EI because of my] experience with [the] product.
I like how the kits ship with everything needed for install and the wire labeling was very helpful.
The display is large and clear. The functions are simple and easy to use. Great purchase decision.
I really appreciate the quality of communication about my order. The instrument offers the right functionality (being a primary instrument) in the right form factor for my application.
Excellent tech help…
Works Great!
All looks very nice. [I chose E.I. because of] previous experience.