Works great!
E-4 EGT Instrument 4-Cylinders
FAA Approved
- TSO’d & STC’d
Don’t Need Your Glasses To Read
- Large digital backlit display.
Interpret Your Readings Faster
- The digital display allows for quick trend analysis.
Budget Friendly
- Same precision found in the most advanced analyzers on the market, but won’t break the bank.
Accurate, Dependable & Easy To Use
- LCD sunlight viewable and backlit for night operation.
- Electronics International consistently has been a leader in digital engine instrumentation since 1979.
Questions?
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Product Overview
Engine Leaning Feature
Precision Leaning
- Unique stable display allows precise leaning to peak EGT or specific temperature below peak.
EGT Diagnostics
- Valuable tool in troubleshooting EGT by providing early detection of potential engine problems.

Reliable Probes
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-4 kit includes four (4) P-110F Fast Response EGT Probes.

Prices
Retail Prices
Included in the package:
- E-4 EGT Instrument 4-Cylinders
- P-110F EGT Probe x 4
- 8′ Thermocouple Extension Cables x 4
- Overlap Connectors
- Wire Harness
- Installation/Operating Instructions
- STC/AML
Description
Package
Retail Price
E-4 EGT 4-Cylinder Package
E-4
$880
Lead Time: Usually ships within 2–3 business days.

Specifications
E-4 EGT Instrument 4-Cylinders Specifications
Dimensions
2.50″ x 2.50″ x 3.65″ Deep, 2 1/4″ Flush Mount
Weight
7 oz (E-4 EGT Instrument 4-Cylinders 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

Videos
Product Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
I like the 3.125″ format. Plus there are no hidden costs of probes you have to buy later…
- Customer
Anthony H. from Oregon
- Aircraft
Piper PA-18 Super Cub
- EI Instrument
I really enjoy your products [because they are] simple and easy to use and affordable.
- Customer
Zach J. from Alaska
- Aircraft
Piper PA-16 Clipper
- EI Instrument
The [unit] is easy to read and quick to respond. I have multiple EI units and have had good experiences with all.
- Customer
Thomas C. from Maine
- Aircraft
Maule M-5-235C Luna Rocket
- EI Instrument
Good engineering support.
- Customer
Richard B. from New Mexico
- Aircraft
Luscombe Model 8E Silvaire Deluxe
- EI Instrument
Great product at a great price …. (and) reliability.
[The EAC-1] looks great running… The wiring harness was very well fabricated. Installation was easy- fit perfectly in an existing hole in panel. The brightness of the display is excellent.
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.
All looks very nice. [I chose E.I. because of] previous experience.
- Customer
Filip G. from Torslanda, Sweden
- Aircraft
Van’s Aircraft RV-6
- EI Instrument
Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.
- Customer
Benjamin T. from South Carolina
- Aircraft
Piper PA-28-181 Archer II
- EI Instrument
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!
Great to have all 6 egt’s, installation was straightforward. [I chose E.I. because of] price and availability.
- Customer
Errol O. from Ontario, Canada
- Aircraft
Cessna 182 Skylane
- EI Instrument