Digital fuel gauges

Discussion in 'Avionics and Upgrades' started by islandboy, Oct 13, 2020.

  1. islandboy

    islandboy Pre-takeoff checklist

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    I've got a C182P and have tired of the wobbly readings, etc. What would you suggest as a digital replacement?

    74 gal useable.
     
  2. Ryan Klems

    Ryan Klems Pre-takeoff checklist

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    CiES fuel senders and an Aerospace logic gauge (assuming you don’t have something else the senders can display on)
     
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  3. islandboy

    islandboy Pre-takeoff checklist

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  4. Ravioli

    Ravioli Final Approach PoA Supporter

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    @islandboy - that's the ticket. We put that into the club C177RG and have never regretted it.
     
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  5. Ryan Klems

    Ryan Klems Pre-takeoff checklist

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    I believe that's the right sender, you'll want to make sure it's the frequency sender. And you'll want the digital (frequency) Aerospace logic gauge. The FL202D https://www.aircraftspruce.com/catalog/pnpages/10-06812.php ... note it's cheaper from Aerospace Logic directly than spruce: http://www.aerospacelogic.com/index.php?dispatch=products.view&product_id=249
     
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  6. islandboy

    islandboy Pre-takeoff checklist

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  7. bnt83

    bnt83 Final Approach PoA Supporter

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    We have a 182L with an Aerospace Logic FL202D and CiES CC284022 0602-101 transmitters. In stable air I would bet its within a gallon of actual fuel in the tanks.**

    I did go a bit above and beyond calibration of the system. We already had dual G5 flight instruments and many pictures of them with the airplane in "level flight attitude" so I jacked and level the airplane to match. We also had a real gasoline dispenser calibration can handy. After all that we put the airplane on the floor drained the tanks again and made an "airplane on ground" fuel quantity correction card.

    **Its pretty easy to see that the last couple gallons are not measurable by the system so until those are burned off the instrument will read "Full"

    upload_2020-10-14_8-10-50.png

    upload_2020-10-14_8-12-13.png
     
    Last edited: Oct 14, 2020
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  8. Jdm

    Jdm Pre-takeoff checklist

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    Just had CiES sending units put in for a customer who was experiencing large fluctuations on the JPI. I’ve flown one test/repositioning flight since. Rock solid now. No erroneous JPI warning now. Very pleased so far. Keep in mind that CiES has a 2-3 week lead time in shipping. We ordered last week and had to pay for their AOG service to get them quickly.
     
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  9. MountainDude

    MountainDude Pre-takeoff checklist

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    I have a '76P as well. I have been using Insight G2 for 10 years and it has been flawless. 6 CHTs, 6EGTs, carb temp, voltage, fuel flow, and fuel totalizer. All for $3K installed. The fuel totalizer is super accurate.
     
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  10. SloRoam

    SloRoam Pre-Flight

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    I put CIES senders in my 182k as well. The head unit that you connect them to also matters, because they have different settings to deal with jitter.

    All fuel gauges will move up and down a little bit as you maneuver or fly, but mine are usually within two to three gallons of my extremely well calibrated fuel flow indicator.

    I have an MVP 50 engine monitor, that's connected to the CIES senders.

    Highly recommended.
     
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  11. David Kagey

    David Kagey Filing Flight Plan

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    Aerospace Logic fuel gauges are great
     
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  12. WannFly

    WannFly Final Approach

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    i have the same set up. in stable air it is accurate to .2 gal (verified multiple times). i have myself taken one tank to the reading of .5 and then switched to the other tank since it was night and i didnt wanted to push my luck. if you are doing the calibration yourself and i recommend you do, there are some YT videos on how to do it, watch it a few times and make sure you are alone when you are doing the calibration.

    it sucks to drain the tank more than once when you do it wrong because your crusty IA is asking a gazillion questions when you are doing the calibration . dont ask me how i know it
     
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  13. EdFred

    EdFred Taxi to Parking

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    Are these capacitance or resistive sending units?

    I have an MVP50 that I've calibrated twice, but still always shows 5-6 gallons low. (Shows that I have less than the actual fuel remaining)
     
  14. WannFly

    WannFly Final Approach

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    believe they are Magnetic Field Fuel Senders
     
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  15. arnoha

    arnoha Cleared for Takeoff

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    I have a pair in my 172 coupled to an FL202D. Incredible units.

    The CiES senders are magneto-reluctance sensors, is my understanding. They have a float, just like a resistive unit, but instead of feeding the motion to a pot, the arm has a small, strong permanent magnet attached to the sensing end. That's sensed through the fully enclosed aluminum body of the unit with reluctance. This is the same tech that's used in ABS systems for measuring wheel speed or in a crankshaft position sensor to measure crank angle. It's very well understood tech that works even in dirty, hot, vibrating conditions.
     
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