Great product. [I chose EI because] you have no competition.
P-102-3/8 CHT Probe – Piggy Back
FAA Approved Instrument
- FAA TSO’d, PMA’d
- Accurate and stable measurements.
- Robust construction.
- Perfected over decades of testing and field trials.
- Other models available, see below for more details.
Compatible with:
MVP-50P, CGR-30, UBG-16, EAC-1, EC-1, EC-1P, EC-2, TC-1P, C-1, C-2, C-4, C-6, CC-1P
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-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.

| Model |
P-102-18 |
P-102-14 |
P-102-12 |
P-102-3/8 |
| Type | Gasket | Gasket | Gasket | Piggy Back |
| Used With | 18 mm Sparkplug | 14 mm Sparkplug | 12 mm Sparkplug | Primary CHT Probe (or Tanis Heater) |
| Max Operating Temp | 700°F | 700°F | 700°F | 700°F |
Learn More |
Learn More |
Learn More |
Learn More |
Prices
Retail Prices
Packages include:
- P-102-3/8 Piggy Back CHT Probe
- Tie Wraps 7.5″ Black HT (4)
- Fire Sleeve 5/8″
- P-102-3/8″ Important Safety Installation Information
- E.I. Wire Connections Guide
Description
Package
Retail Price
P-102-3/8 CHT Probe
-
$128

Specifications
Specifications
Type
Piggy-Back
Used With
Primary CHT Probe (or Tanis Heater)
Operating Temp Range
-80°F to 700°F Max.
Certifications
FAA, TSO’d, PMA’d
Configuration
Type K, Ungrounded
Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
This is the third EI instrument I am having installed in “Lillybelle .” I am impressed with the ease of operation, the affordability and the accuracy of each of these instruments. For years I trusted my life to 50+ year old gauges. Now I don’t have to. What a relief!
- Customer
Charles M. from South Dakota
- Aircraft
Cessna 150F
- EI Instrument
[I chose EI because of its] Reputation and value.
I installed a VA-1A Volts/Amps Insturment [sic] in my 1970 V35B to replace the original analog amp meter. What a great dual purpose digital gauge! Installation was simple and the product is very well made. It goes well next to my SuperClock I installed a couple of years ago. EI makes great products and this one will satisfy the most discriminating owner.
- Customer
Brewer P. from Mississippi
- Aircraft
Beechcraft Bonanza V35B
- EI Instrument
Easy installation.
Straightforward installation instructions, great wiring harness. Quick answers from Tech Support.
Very easy to install. Harness is clearly marked. Instrument worked first time. The instrument is intuitive and easy to use.
- Customer
William F. from Maryland
- Aircraft
Mooney M20C Ranger
- EI Instrument
Awesome product. Fast easy installation.
- Customer
Rodney E. from Georgia
- Aircraft
Cessna 172M Skyhawk
- 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
MVP-50 is a really great product
Currently have multiple EI Instruments in our aircraft. Quality and reliability are key.
- Customer
Jason Y. from Arizona
- Aircraft
Cessna 182A
- EI Instrument
Great… price [&] support
- Customer
Harry V.D.H. from New Zealand
- Aircraft
Piper PA-28R-200 Arrow II
- EI Instrument