Aerospace Logic Dual Resistive Fuel Level Gauge Two Tank Fl202

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Part# 10-04432
MFR Model# FL202


Aerospace Logic AOG Expedite Available, additional charges will apply.

The FL20X instruments are advanced, next generation airborne fuel level reporting instruments that support from two to six fuel tanks using resistive, float type fuel senders. Fuel level functionality is TSO'd and meets the repeatable accuracy requirements
of SAE AS405C, +/- 1US Gallon.

Functional displays include:
  • Graphical indication of fuel
    level in each tank
  • Selectable digital fuel quantity
    for each tank
  • Fully programmable color indication to meet all aircraft marking requirements
  • Graphical fuel level indication, starting at power on


  • Certification: TSO C55a
  • Signal Input: Sender resistance 0.25Ω to 300Ω
  • Display: Fuel Quantity US Gallons or Litres
  • Accuracy: Fuel Quantity AS405C +/- 1 USG
  • Range: 0 to 120 USG (defined by fuel sender / tank size)
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I just finished this install, only took 2 weeks , lol. Let me be very clear about what I have not seen anyone else run into or comment on. This gauge is so precise that you better make sure your sending units are in up to spec. Older planes (like my 65 PA28) may need to have new or rebuilt sending units. I sent 2, 10 hour days trying to get this gauge to calibrate- Gave up, sent Sending units to Keystone for rebuild. Once that was all together, it took 24 min per tank and that was by myself. I suggest at least 2 people though! I cant wait for my first CC to really test them out, but this gauge seems rock solid!

Joe B
July 25, 2021

Easy to install, nice display, really like that it works with old float type sender units.

Flying K Verified Purchase


June 24, 2021

Have not installed yet because I am waiting for the fuel tank sending units.

Les G
August 10, 2019

Unit is super accurate. Replaced the legacy fuel tank levels in a Cessna 150 with this unit. We ended up replacing the fuel senders as well since they were original and pretty much shot. None the less the unit is very accurate. Works great with a fuel flow meter.

Edward S
January 5, 2019

Excellent units my 3rd one Im installing into my Pacers. Very accurate even if your senders are marginally accurate. No hardware issues after 5 years. Its expensive but I highly recommend this.

Jared C
November 5, 2017

We installed this in our Commander 112 two years ago and it is a major upgrade to the accuracy of the fuel situation. Unfortunately the price has almost doubled in two years for the FL202 so I am not sure why as we would not have purchased at this price however it is a great piece of instrumentation !

April 13, 2016

After running a tank out of fuel with a fuel gauge indicating a little less than 1/4 tank of fuel left, I purchased the Aerospace Logic digital dual fuel gauge. It takes time to properly calibrate, but when I got it properly calibrated, it is right on accurate. If the gauge indicates that I have used 17.3 gallons, then it takes 17.3 gallons to fill my tank back up. I consider that my flying is much safer now.

June 7, 2015

Cessna 182Q with Cies Senders. Seems to be an excellent product, calibration was extremely tedious but well rewarded, and the install instructions were marginal. Dont expect to reach them by phone, youll have to use email. To be sure of not wasting precious time with fuel draining and filling, aerospace logic could give more specific and thorough install instructions. In hindsight, install was simple, but only after I had to ask specific questions. After all the work though, so happy to have an accurate fuel gage. Also, pair these with CIES senders, waste of money not to pair this nice gage with quality senders.

Rick H
September 27, 2021

Setup and install was straight forward if you do some good planning and prep. I installed new fuel sending units from McFarlane as part of this install. A few things I noticed. I noticed the display can be challenging to read in certain conditions with polarized sunglasses so consider your dash placement. I carefully performed the aircraft leveling and waited at least one minute after adding fuel to settle down during cal. In flight I noticed the gauge indication readings change drastically during taxi, turbulence’, pitch changes or if a turn is not perfectly coordinated guessing since the fuel tank doesn’t use baffles so fuel can slosh around. Overall in my Cessna 172 it’s a slight improvement over the old gauges I had but not the radical improvement I expected. A functioning analog gauge is just as good. Problem is these old analog gauges are getting hard to support and becoming unreliable. Seemed pretty expensive for what I gained. Wish I had just spent the money on an Fl450 instead. Indication looks pretty nice on the dash though.

Jennifer C Verified Purchase


April 20, 2022

Unit is well built but very sensitive if using resistor type fuel senders. I have two of these units and ran into an issue getting the second one to work correctly. After many frustrating days of work I finally succeeded by running a ground wire from sender all the way back to same ground as the instrument. I was extremely disappointed in the customer service from the manufacturer. They left me high and dry. Stopped responding to emails and phone calls. I would have had a different opinion if they would have stuck with me through the issue.

Timothy L
November 8, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What is the resistance range of the float transmitter for the Aerospace Dual Fuel level gauge?

The Dual Fuel Level gauge works with resistive probes. The range is .25 OHMS to 300 OHMS.

Q: Does the instrument include STC documentation for installation for certified aircraft?

Per the manufactuerer, the STC documentation is included.

Q: What are the AEROSPACE LOGIC DUAL FUEL LEVEL GAUGE dimensions and mounting type?

The Aerospace Logic dual fuel level gauge mounts in the standard 2-1/4" instrument hole. The depth of the instrument is 0.9".

Q: Does the Aerospace Logic Dual Fuel Level gauge come with probes / senders?

No, this unit uses your existing fuel level probes / senders.

Q: Does the four tank unit display 4 vertical green tapes or is there a selector switch to select 2 different tanks to display on the 2 tapes?

This gauge displays 4 tapes constantly.

Q: Can this gauge be installed as a primary?

Per the installation manual: Yes. The FL202 instrument is TSO'd and STC'd as a primary replacement instrument under all flight conditions (day/night VFR and IFR).

Q: Does this come with the float transmitters?

No. The senders are not included.

Q: Will this work on m20c ranger 68?

This is FAA TSO approved for use on certified aircraft. For specific aircraft eligibility information, we recommend consulting with your certified avionics install shop.

Q: Can the AEROSPACE LOGIC DUAL GAUGE FL202 units be changed to liters?

Yes, this unit allows for user selection.

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