Home / ei Products / Piston Engine Aircraft / EC-1 EGT and CHT Instrument
EC-1 EGT and CHT Instrument
FAA Approved
- TSO’d & STC’d
Monitor Two Channels
- Provides one channel of EGT and one channel of CGT.
- Can be upgraded to a full analyzer by adding an E.I. Remote Switch kit.
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.
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 or CHT 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 EC-1 kit includes one (1) P-110F Fast Response EGT Probe and one (1) P-100 CHT Probe.

Prices
Retail Prices
Included in package:
- EC-1 EGT & CHT Instrument
- P-110F Fast Response Probe
- P-100 CHT Probe
- 8′ Thermocouple Extension Cable x 2
- Overlap Connectors
- Wire Harness
- Installation/Operating Instructions
- STC/AML
EC-1 EGT & CHT Instrument Package
EC-1
$580
Lead Time: Usually ships within 2–3 business days.

Specifications
EC-1 Specifications
Dimensions
2.50″ x 2.50″ x 3.65″ Deep, 2 1/4″ Flush Mount
Weight
7 oz (EC-1 EGT & CHT 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

Videos
Product Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
Great to have all 6 egt’s, installation was straightforward. [I chose E.I. because of] price and availability.
- Customer
- Aircraft
- EI Instrument
The tach looks and operates amazing. Extremely accurate.
Great product. [I chose EI because] you have no competition.
Great… price [&] support
- Customer
- Aircraft
- EI Instrument
Straight forward installation instructions, great wiring harness. Quick answers from Tech Support.
Great product. So easy to read compared to the originals.
Great Product, that provides a lot of very helpful engine data in an easy to use and see display! We are already finding cylinder cooling issues that we would’ve never known about before, and probably explains why we’ve had to replace that specific cylinder in the past. EI customer service on questions on how we wanted to set ours up was very helpful and positive. The CGR-30 had quite a few positive reviews online from other users.
- Customer
- Aircraft
- EI Instrument
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.
I have never had an issue with any EI products… it looks fantastic on the panel.
- Customer
- Aircraft
- EI Instrument
Compact, precise, awesome!
- Customer
- Aircraft
- EI Instrument
Delivered much quicker than website banner! Responsive customer service, kudos to [customer service].
- Customer
- Aircraft
- EI Instrument