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!
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P-101 CHT Probe
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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-2 connector. The OLC-2 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.
Prices
Retail Prices
Packages include:
- P-101 CHT Probe
- Installation Instructions
Description
Package
Retail Price
P-101 CHT Probe*
-
$128
* To be used with the A-101 CHT Adapter, 700°F Max.

Specifications
Specifications
Type
Military Bayonet
Operating Temp Range
-80°F to 700°F Max.
FAA Certifications
TSO’d, PMA’d
Common Uses
CHT Readings
Configuration
Type K, Ungrounded
Operating Range
700°F Max
Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
Sharp-looking gauges. [I chose EI because of your] reputation.
- Customer
Garrett R. from Alaska
- Aircraft
Beechcraft King Air Model B100
- 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
Have had EI instruments in my past plane and current plane and they always performed flawlessly.
- Customer
Gary M. from California
- Aircraft
Cessna 182Q Skylane
- EI Instrument
I started with a CGR-30C. I loved it so much, I added a CGR-30P… [Your customer service] was a great help configuring it and EI gave me a great deal. I am now an EI customer for life!
- Customer
Andrew R. from Florida
- Aircraft
Piper PA-28-180 Archer
- EI Instrument
Good value and functionality. I’ve used your instruments on multiple aircraft thru the years with no issues. These are a nice upgrade over the original instruments in most older aircraft.
This is a high quality instrument and works perfectly. Well designed, well constructed and well documented. I couldn’t be more pleased!
A clear capable replacement for a cluster gauge. Vivid colors used which make it easy to see engine status at a glance.
- Customer
Adam S. from New Zealand
- Aircraft
Cessna 172N Skyhawk
- EI Instrument
Your product didn’t feel cheaply made. Overall much better quality with the bezel and buttons and knobs. Also much easier to navigate and add fuel.
- Customer
Justin R. from Texas
- Aircraft
Cessna T207A Turbo Skywagon
- EI Instrument
The equipment is fantastic, very intuitive, and easy to use.
- Customer
Gregory S. From Brazil
- Aircraft
Air Tractor AT-502A
- EI Instrument
[I chose the CGR-30P because of its] ease of use.
- Customer
Chris M. from Pennsylvania
- Aircraft
Piper PA-28 Cherokee
- EI Instrument
I love my new EGT. Very accurate and has ambient air temperature so I know how cold my engine is before I start it. Easy to see lighting.
- Customer
Don K. from Wisconsin
- Aircraft
Piper PA-28-150
- EI Instrument