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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.
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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
We chose your product because of the great support and reputation your company sustains.
Great tech support. Someone always answers and gives accurate concise information.
- Customer
Thomas M. From Georgia
- Aircraft
Mooney M20C Ranger
- EI Instrument
I have seen your products in other aircraft and have seen their reliability.
- Customer
Juan P. from British Columbia, Canada
- Aircraft
Cessna 172M Skyhawk
- EI Instrument
Good product; company is eager & willing to help
Your products always work great! Great customer service and a quality product that we have used for years.
- Customer
Brenton C. from Tennessee
- Aircraft
Cessna 172M
- EI Instrument
Love it!
- Customer
Corey B. From Texas
- Aircraft
Grumman American AA-5A Cheetah
- EI Instrument
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
Gauge works great! Very happy with purchase.
- Customer
Aryan M. from California
- Aircraft
American Champion 8KCAB
- EI Instrument
I have worked with and installed a few of your competitors’ and your systems. EI instruments’ ease of use and installation make these systems my go-to choice and number one recommendation to customers.
EI has the best customer service of any company that I’ve ever dealt with.
- Customer
Greg J. from Georgia
- Aircraft
Beechcraft C23 Sundowner
- EI Instrument
Looks Great, and intuitive to use. Packs a lot of information in a tight area, yet, I don’t need my glasses to read it!
- Customer
Bill M. from Connecticut
- Aircraft
American Champion Citabria 7KCAB
- EI Instrument