Some of the best customer service in the avionics network that I’ve had the pleasure of dealing with. [I chose EI because of the] features, simplicity, and the user-friendly platform.
P-104 Universal Temp Probe
FAA Approved Instrument
- FAA TSO’d, PMA’d
- Accurate and stable, precise temperature measurements.
- Used to measure surface temperatures, 700°F Max.
- Robust construction.
- Perfected over decades of testing and field trials.
Compatible with:
MVP-50P, CGR-30, UBG-16, E-1, E-1P, E-2, E-4, E-6, EAC-1, EC-1, EC-1P, EC-2, TC-1P, C-1, C-2, C-4, C-6
Questions?
8am–4:30pm PST M–F
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Product Overview

Prices
Retail Prices
Packages include:
- P-104: Universal Temp Probe
- Installation Instructions
Description
Package
Retail Price
P-104: Universal Temp Probe
-
$128
Specifications
Specifications
Type
Screw Down, #6 Hole Size
Certifications
FAA, TSO’d, PMA’d
Max Operating Temp
700°F
Configuration
Type K, Ungrounded
Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
The reviews online were very good. Customer service has been great.
I have been installing avionics since 1996. This was THE BEST wire harness I have ever seen!
The equipment is fantastic, very intuitive, and easy to use.
- Customer
Gregory S. From Brazil
- Aircraft
Air Tractor AT-502A
- 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
Works great!
- Customer
Ronald G. From Washington
- Aircraft
Cessna 195A
- EI Instrument
I won a FP-[5]L and had it installed in my c150. I was/am impressed with the accuracy and ease of operation of the FP. I wanted a new tach and I trust (and verified) that the EI R-1… would be my best choice. I am not a rich man. These instruments are affordable and incredibly accurate. Already planning my next buy from EI.
- Customer
Charles M. from South Dakota
- Aircraft
Cessna 150F
- EI Instrument
Really impressed thus far . . . . a rock solid replacement for old mechanical gauges.
- Customer
Eric H. from Mississippi
- Aircraft
Beechcraft C23 Sundowner
- EI Instrument
I really appreciate the quality of communication about my order. The instrument offers the right functionality (being a primary instrument) in the right form factor for my application.
Great product and excellent customer service!
- Customer
James W. from FL
- Aircraft
Van RV-6A
- EI Instrument
Great system and great benefit having everything in one place. Love it.
- Customer
Gary D. from OK
- Aircraft
PA28R-200
- EI Instrument
Easy install and great gauges. Previous experience showed that EI’s units were… great prices and even better instruments. Being able to install the gauge as a primary instrument was a major plus.
- Customer
Logan from Montana
- Aircraft
Cessna 172B
- EI Instrument