I have used your products in every airplane that I have owned over the years and have never had a problem. Thank You
- Customer
Gregory V. from New Hampshire
- Aircraft
Cessna A185F Skywagon and AgCarryall
- EI Instrument
8am–4:30pm PST M–F
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This feature requires an optional Remote Switch (RS-4-1S, add $349) see in Product Catalog and Price List.

An Engine Monitor is only as good as its probes. That’s why Electronics International (EI) has taken the development of its probes, connectors, and accessories very seriously. EI has been designing and manufacturing probes for over 30 years. All of our probes have been designed in-house by our engineering team. Our team has studied, tested and designed temperature probes since the 1970′s. They have written research documents such as The Pilots Manual – Leaning and Diagnosing Engine Problems and Accurate CHT Measurements.
Just as an Engine Monitor is only as good as its probes, a probe is only as good as its connector. That’s why EI’s engineering team developed EI’s proprietary OLC-1 connector. The OLC-1 connector greatly increases reliability and reduces installation errors as compared to traditional type connectors. Whether you’re looking for a reliable and accurate CHT, EGT, TIT or various other probe types, EI has what you need. With more than a half million probes sold and tested you can count on EI’s reliability.
The E-1 kit includes one (1) P-110F Fast Response EGT Probe.

E-1 Package
E-1
$428
Lead Time: Usually ships within 2–3 business days.

Dimensions
2.50″ x 2.50″ x 3.65″ Deep, 2 1/4″ Flush Mount
Weight
7 oz (E-1 Single EGT Instrument Only)
Power Requirements
7.5 to 35 Volts, Typical: 0.1 amps @ 12 Volts
Display
Viewable in direct and indirect sunlight.
Backlight
Fully backlit and dimmable for night flights.
Certifications
FAA TSO’d, STC’d

I have used your products in every airplane that I have owned over the years and have never had a problem. Thank You
Straightforward installation instructions, great wiring harness. Quick answers from Tech Support.
[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.
The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
Your customer support is far superior . . . . I appreciate all your help.
We chose your product because of the great support and reputation your company sustains.
After a full IFR install on my Cessna 175, my two favorite instruments without question is the CGR-30 Combo set. Simple and customizable, the data is invaluable!
I really enjoy your products [because they are] simple and easy to use and affordable.
I have been flying with EI instruments for over 20 years. I purchased the CGR-30P to update my engine instruments into one modern package.
Incredible customer service.
Excellent Service. Superb Product.
Great to have all 6 egt’s, installation was straightforward. [I chose E.I. because of] price and availability.