Your customer service is excellent and your products are top quality!
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?
8am–4:30pm PST M–F
[mbhi location="Main"]
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
Why did you choose our products over the competition? Complete kit and ease of installation.
- Customer
Mitch G. from Canada
- Aircraft
DeHavilland DHC-2 beaver
- EI Instrument
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.
Your products always work great! Great customer service and a quality product that we have used for years.
- Customer
Brenton C. from Tennessee
- Aircraft
Cessna 172M
- EI Instrument
Haven’t used it yet, but we are excited to & Love the way it looks!!
- Customer
Larry A . From Idaho
- Aircraft
Piper PA-28R-200 Arrow
- EI Instrument
EI representatives… have been very helpful, truthful, and knowledgeable… We had no idea, that a few weeks later [after our purchase], we would need to have a Top Overhaul. What great timing! Having your engine monitor installed in our plane will hopefully help us keep it out of the shop for further engine repairs.
- Customer
Phillip B. From Oklahoma
- Aircraft
Cessna 210N Centurion / Turbo Centurion
- EI Instrument
Excellent customer service. Without a doubt the best aviation part I have purchased.
- Customer
Alan B. from Florida
- Aircraft
Reid and Sigrist R.S.1 Snargasher
- 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!
Safety and simplicity!
- Customer
Andrew L. from Florida
- Aircraft
Piper PA-28-235 Cherokee Pathfinder
- EI Instrument
Easy to install, and the CGR was set up to my aircraft’s exact specifications.
You folks do a great job. Keep up the good work.
- Customer
Kevin D. from Missouri
- Aircraft
Cessna 172 Skyhawk
- EI Instrument
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