Installing [EI’s FP-5L] in my RV 6. . . owned an FP-5L 6 years ago in a Cessna 206 on floats in a commercial operation in Alaska. Getting every ounce of payload, and coming home across Cook Inlet with the Cessna gas gauges near or on empty, I spent a lot of time explaining the benefits of the Fuel flow gauge… and reassured my passengers there were 12 gallons of fuel on board. I’m a believer…
P-128-S – Sealed Tip OAT/Carb Temp Probe
FAA Approved Instrument
- FAA TSO’d, PMA’d
- Accurate and stable, precise temperature measurements.
- For use in pressure environments, uses a precision connector.
- Robust Construction, stainless steel body.
- Perfected over decades of testing and field trials.
Compatible with:
A-1, CA-1, EAC-1, MVP-50P, CGR-30, and UBG-16
Questions?
8am–4:30pm PST M–F
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Product Overview

Prices
Retail Prices
Packages include:
- P-128-S – Sealed Tip OAT/Carb Temp Probe
- Installation Instructions
Description
Package
Retail Price
P-128-S – Sealed Tip OAT/Carb Temp Probe
-
$128

Specifications
Specifications
Typical Applications
OAT/Carb Temp Readings
Operating Range
-80° – 700°F Max
Certifications
FAA, TSO’d, PMA’d
Configuration
Type K, Ungrounded
Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
It works very well; easy operation.
- Customer
Socrates K. , Cyprus
- Aircraft
Cessna F172H
- EI Instrument
We chose your product because of the great support and reputation your company sustains.
The [unit] is easy to read and quick to respond. I have multiple EI units and have had good experiences with all.
- Customer
Thomas C. from Maine
- Aircraft
Maule M-5-235C Luna Rocket
- EI Instrument
Love the look and having every piece of info in front of me… Better price and look [versus competition].
This is a high quality instrument and works perfectly. Well designed, well constructed and well documented. I couldn’t be more pleased!
Works great!
Nice product and fulfills the requirement.
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
EI’s products are the only ones we recommend to our customers.
- Customer
Hugo T. from Florida
- Aircraft
Cessna 177B
- EI Instrument
After enquiring through (one of) your dealers and calling EI directly it was clear that you provided good customer service and would likely not drop the ball on tech support, and so far I have been right.
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