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
MVP-50P, CGR-30, UBG-16, EAC-1, EC-1, EC-1P, EC-2, TC-1P, E-1, E-2, E-4, E-6
8am–4:30pm PST M–F
Sorry, We’re Closed


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.
P-110-R EGT Robust Probe
P-110-R
$128

Common Uses
HEGT Readings
Type
Hose Clamp, 13/64″ Hole
Operating Temp Range
-80°F to 1,800°F
Sensor
Type K Thermocouple
FAA Certifications
TSO’d, PMA’d
Configuration
Ungrounded
Material
316L SS
The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
Pleasure supporting folks with like values.
Nice experience working with [sales]… to configure my gauges.” Reason I chose EI? “Past experience with EI.
Straight up install no issues. Works as advertised!
Excellent tech help…
[I chose the CGR-30P because of its] ease of use.
Works Great! Love it!
Currently have multiple EI Instruments in our aircraft. Quality and reliability are key.
Your products always work great! Great customer service and a quality product that we have used for years.
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.
I have worked with your products before and I like them.
Very easy to install. Harness is clearly marked. Instrument worked first time. The instrument is intuitive and easy to use.