Easy to install, and the CGR was set up to my aircraft’s exact specifications.
C-1P Single CHT Primary Instrument
FAA Approved Instrument
- FAA, TSO’d, STC’d as a Primary Replacement.
- Upgrade your aircraft panel with the most precise CHT Primary Instrument.
Don’t Need Your Glasses To Read
- Large digital backlit display.
Interpret Your Readings Faster
- The one-degree 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
- C-1P fits into your existing 2 1/4″ hole.
- 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
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 C-1P kit includes one (1) P-100 CHT Probe.

Prices
C-1P Retail Prices
Included in the package:
- C-1P Single CHT Primary Instrument
- P-100 CHT Probe
- 8’ Thermocouple Extension Cable
- Overlap Connectors
- Wire Harness
- Installation/Operating Instructions
- STC
Note: The order MUST specify Over-Temp Limit.
Description
Package
Retail Price
C-1P Single CHT Primary Instrument Package
C-1P
$492
Lead Time: Usually ships within 2–3 business days.

Specifications
Specifications
Dimensions
2.50″ x 2.50″ x 3.65″ Deep, 2 1/4″ Flush Mount
Weight
7 oz (C-1P Single CHT Primary 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
Documents
Documents & Manuals
Testimonials
Customer Testimonials
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.
While the installation is not quite done yet, I have seen the unit in my aircraft with the engine running and the monitor producing numbers. It looks very good and I cannot wait to go flying with it!
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.
We liked the price and the reputation of your company.
- Customer
Roy C. From Kentucky
- Aircraft
Piper PA-28-235 Cherokee Pathfinder
- 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
We love our MVP-50P w/ its crisp, intuitive display and ease of operation.
Easy Install.
- Customer
Leslie S. from Connecticut
- Aircraft
Piper Arrow PA-28R-200
- EI Instrument
Awesome product. Fast easy installation.
- Customer
Rodney E. from Georgia
- Aircraft
Cessna 172M Skyhawk
- EI Instrument
Always built well. Always dependable. Been using & relying on EI equip for over 35 years!
Awesome Tech Support. Like the functions it supports and the fit and look in the panel.
- Customer
Brian M. from California
- Aircraft
Mooney M20F Executive 21
- EI Instrument
Sharp-looking gauges. [I chose EI because of your] reputation.
- Customer
Garrett R. from Alaska
- Aircraft
Beechcraft King Air Model B100
- EI Instrument