Good support when we called with particular questions with the initial setup. We liked the functions and the price.
FL-1 Single Fuel Level
Stable Digital Fuel Level for Single Tanks
- 210° graphical arc for quick reference of the tank fuel level.
Easy To Install & Versatile
- The FL-1 fits into one of your existing 2 1/4″ holes.
- Switch easily between Gallons, Liters and Pounds.
Accurate, Dependable & Easy To Use
- Electronics International consistently has been a leader in digital engine instrumentation since 1979.
Questions?
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Product Overview
FL-1 Overview

The FL-1 offers pilots an accurate, stable digital fuel level for single tank configurations. Not only does the FL-1 display the tank level digitally, it also provides a 210° graphical arc for immediate, quick reference of the tank fuel level.
The FL-1 can be ordered to work with a resistive probe (FL-1R-12 or FL-1R-24, depending on 12 or 24 volts), a capacitive probe (FL-1CA) or a 0-5 volt output such as with some Skysports probes (FL-1V). Please be sure to specify which model you need when you order your FL-1.
The FL-1 is not STC’d for installation in a certified aircraft.
Features
Fuel Slosh Stablization
When in flight, fuel will slosh around in the aircraft fuel tanks, creating irritating readings that constantly jump around. The FL-1 has a Fuel Slosh Stabilization calibration point that averages fuel level readings, creating a much more stable, but still extremely accurate fuel reading. Calibrate between a couple of seconds all the way up to over a minute of fuel slosh averaging.
9 Calibration Points
The FL-1 allows installers to program from as little as two all the way up to nine fuel level calibration points in the fuel tank. This flexibility eliminates inaccuracies due to non-linear fuel tanks.
Easy Programming Interface
The FL-1 is a simple instrument to install and program. Clear step-by-step instructions make programming the instrument easy to calibrate to your fuel tank senders.
Selectable Units
The pilot can easily select between displaying fuel level in Liters, Gallons or Lbs with a switch on the front of the instrument panel.
Prices
Retail Prices
Package includes:
- FL-1 Instrument
- Wire Harness
- Operating & Installation Instructions
Description
Package
Retail Price
FL-1 Single Fuel Level Package
FL-1RA-12, FL-1RA-24, FL-1CA, FL-1V
$600
- FL-1RA-12 : 12-Volt System
- FL-1RA-24 : 24-Volt System
- FL-1CA: Capacitive Probes
- FL-1V: 0-5 Volt Output (Skysports Probes)

Specifications
Specifications
Dimensions
2.5″ x 2.5″ x 3.65″ Deep, 2 1/4″ Flush Mount
Weight
Instrument: 11 oz
Fuel Flow Transducer: 6 oz
Power Requirements
7.5 to 35 Volts
Typical: 0.1 amps @ 12 Volts
Intensity Control
Independent control lines allow pilots to adjust the intensity of both the Green Indicator Lights and the LCD Backlight during instrument operations. See downloads page for more information.

Videos
Product Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
EI representatives… have been very helpful, truthful, and knowledgeable… We had no idea, that a few weeks later [after our purchase], we would need to have a Top Overhaul. What great timing! Having your engine monitor installed in our plane will hopefully help us keep it out of the shop for further engine repairs.
- Customer
Phillip B. From Oklahoma
- Aircraft
Cessna 210N Centurion / Turbo Centurion
- EI Instrument
Fantastic customer support!
Great service and support for great products!
All looks very nice. [I chose E.I. because of] previous experience.
- Customer
Filip G. from Torslanda, Sweden
- Aircraft
Van’s Aircraft RV-6
- EI Instrument
E.I. Always Exceeds Expectations!
- Customer
Michael S. from California
- Aircraft
Beechcraft Bonanza Model 33 Debonair
- EI Instrument
The CGR-30P is a fantastic product and EI has excellent customer service. EI is the leader in engine monitors with a strong track record.
- Customer
William G. from New York
- Aircraft
Cessna 182Q Skylane
- EI Instrument
The FP-5l I had installed is easy to use and so accurate it’s almost scary. When I find a company that produces a product that good I stick with them. The fact that these instruments also look so darn good didn’t hurt either.
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 tech support. Someone always answers and gives accurate concise information.
- Customer
Thomas M. From Georgia
- Aircraft
Mooney M20C Ranger
- EI Instrument
Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.
- Customer
Benjamin T. from South Carolina
- Aircraft
Piper PA-28-181 Archer II
- EI Instrument
Works great!
- Customer
Ronald G. From Washington
- Aircraft
Cessna 195A
- EI Instrument