Installation went great. The Fuel Flow is dead on.
- Customer
Tyler A. from Tennessee
- Aircraft
Piper PA-32RT-300T
- EI Instrument
8am–4:30pm PST M–F
Sorry, We’re Closed

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.

E-4 EGT 4-Cylinder Package
E-4
$880
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-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

Installation went great. The Fuel Flow is dead on.
We liked the price and the reputation of your company.
[I chose EI because they offer a] certified replacement vs. back-up only and they look great.
The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
Nice experience working with [sales]… to configure my gauges.” Reason I chose EI? “Past experience with EI.
Very complete and thorough packaging. Well-prepped wiring harnesses. Quick and efficient turnaround time. Great communication throughout the process.
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.
Outstanding support. From the friendly demeanor of whoever answers the phone to all the way to [their sales representative]. Your CGR-30 series is superb.
A clear capable replacement for a cluster gauge. Vivid colors used which make it easy to see engine status at a glance.
Customer service always quick and easy. [I chose E.I. because of] price and being recommended by friends.
Easy installation.
The reviews online were very good. Customer service has been great.