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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.
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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
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.
- Customer
Robert B. from California
- Aircraft
2002 Diamond DA40-180
- EI Instrument
Easy installation, lightweight solution. It looks good and is easy to use. [I chose E.I. because] I needed to replace my old Hobbs meter. This provided more functionality, allowing me to remove my old digital timer, and EI programmed it to my current airframe time.
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
Good reviews and I don’t have to modify my panel. Additionally, the reps at Oshkosh were extremely helpful and answered all my questions.
- Customer
Michael M. From Iowa
- Aircraft
Cessna 182N Skylane
- EI Instrument
Outstanding Customer Service!!
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
Fantastic customer support!
EI’s products are the only ones we recommend to our customers.
- Customer
Hugo T. from Florida
- Aircraft
Cessna 177B
- EI Instrument
The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
- Customer
Daniel N. From California
- Aircraft
Cessna 175 Skylark
- EI Instrument
Looks great. Works great.
- Customer
Stephen W. N. from Texas
- Aircraft
Cessna 177 Cardinal
- EI Instrument
Safety and simplicity!
- Customer
Andrew L. from Florida
- Aircraft
Piper PA-28-235 Cherokee Pathfinder
- EI Instrument