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Bolt-In Fuel Sender Replacements

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Fuel Sender 101

Symptoms / Problems

Bolt-In Fuel Sender Replacements for General Aviation.

CiES fuel level senders are a physical bolt-in replacement for many general aviation manufacturers for fuel tank quantity. Here you’ll find the models covered by the current FAA STC.

Please note: CiES fuel senders require a power wire for operation.

The complex sender circuitry in a CiES fuel sensor requires an extra wire to operate. For general installations, you can download installation instructions in pdf format or use our online installation instructions index to go directly to the desired section.

Unless otherwise specified, we support 30+ fuel gauges and instrument panels. These are also covered by the STC. If you require support for an existing gauge (aircraft must have a tank and gauge map), please contact us for details before ordering.

We also engineer custom solutions. Please contact us for more information.

FAA Approved (AML) STC

General Aviation Models

  • Aermacchi

    (F.260, F.260B, F.260C, F.260D, F.260E, F.260F, S.205– 8/F, S.205 – 18/R, S.205-20/F S.205–20/R, S.205–22/R, S.208 S.208A)

  • American Champion


  • Amphibian Aircraft

    (HU-16A, HU16B, HU-16C (UF-1, UF-1G), HU-16D (UF-2), HU-16E (UF2G))

  • Britten-Norman

    (BN-2, BN-2A, BN-2A-6, BN2A-8, BN-2A-2, BN-2A-9, BN2A-3, BN-2A-20 BN-2T-4R, BN2A-21, BN-2A26, BN-2A-27, BN-2B-20, BN2B-21, BN-2B26, BN-2B-27, BN-2T2BN2A MK III, BN2A MK III-2, BN2A MK III-3)

  • Cataline Aircraft


  • Consolidated Vultee (Stinson)


  • Fairchild

    (24 C8C, 24 C8CS)

  • Frakes Aircraft

    (G-44 (Army OA14, Navy J4F-2), G-44A, G-73)

  • GA 8 Airvan

    (GA8, GA8-TC320)

  • Helio Aircraft

    (H-250 (USAF U-10D), H-295, HT-295 (USAFYL-24), H-391, H-391B (USAF L-28A or U-10B), H395, H-395A, H700, H-800)

  • Howard Aircraft

    (DGA-15P (Army UC-70; Navy GH-1, GH-2, GH-3, NH-1), DGA-15J (Army UC-70B), DGA15W, 500)

  • Maule Air

    (Bee Dee M-4, M-4, M-4C, M4S, M-4T, M-4-180C, M-4-180S, M-4-180T, M-4-210, M-4-210C, M-4-210S, M-4-210T, M-4-220, M-4-220C, M-4-220S, M-4-220T, M-5-180C, M5-200, M-5-210C, M-5-210TC, M-5-220C, M5-235C, M-6-180,
    M-6-235, M-7-235, MX-7-235, MX-7-180, MXT-7-180, MT-7-235, M-8-235, MX-7-160, MXT-7-160, MX-7-180A, MXT-7-180A, MX-7-180B, M-7-235B, M-7-235A, M7-235C, MX-7-180C,M7-260, MT-7-260, M-7-260C, MX-7-160C, MX-7-180AC, M-9-235)

  • Micco Aircraft

    (MAC-145, MAC-125C, MAC145A, MAC-145B)

  • Pilatus Aircraft


  • Reims Aviation


  • REVO Incorporated


  • Rockwell/Commander

    (112, 112TC, 112B, 112TCA, 114, 114A, 114B, 114TC)

  • Sierra Hotel Aero (formerly Navion)

    (Navion (L-17A), Navion A (L17B) (L-17C), Navion B, Navion D, Navion E, Navion F, Navion G, Navion H)

  • Sky Enterprises



    (TB 9, TB 10, TB 20, TB 21, TB 200)

  • Tecnam

    (P2006T, P2010, P2012)

  • Textron Aviation

    (65 (L-23F), 65-A90-1 (JU-21A), A65 (U-21A), A65-8200 (RU21A), 65-80 (RU21D), 65-A80 (U21G), 65-A80-8800 (RU-21H), 65-B80, 65-A90-2 (RU-21B), 65-88, 65-90, 65-A90 (RU-21H), 65-A90-3 (RU-21C), 65-A90-4 (RU21E), 70, B90, C90, C90A, C90GT, E90, H90 (T-44A), D17S (Army UC-43, UC*43B, Navy GB-1, GB2), SD17S)

  • Tiger Aircraft

    (AA-5, AA-5A, AA-5B, AG-5B)

  • Twin Commander Aircraft

    (500, 500A, 500B, 500U, 500S, 520, 560, 560A, 560E, 560-F, 680, 680E, 680F, 680F(P), 680FL, 680FL(P), 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695, 695A, 695B, 720)

  • Univair (Stinson)

    (108, 108-1, 108-2, 108-3, 108-5)

  • Viking Air Limited (formerly de Havilland)

    (DHC-2 Mk. I, DHC-2 Mk. II, DHC-2 Mk. III)

  • Vulcanair S.p.A.

    (P.68, P.68 "Observer 2", P.68B, P.68C, P.68 "Observer", P.68TC "Observer'', P.68C-TC, V1.0)

  • Waco Aircraft


  • Zlin Aircraft

    (Z-242L, Z-143L)

maule airplane

Adrian Pingstone, Public domain, via Wikimedia Commons

We tried a number of resistive float senders with terrible accuracy. With CiES senders, our indicated fuel is within 0.5 gallons of the EDM830 totalizer every time!

- Tony Varga
Commander 112

FAA Approved (AML) STC

Gauge Models

ItemCockpit Display ManufacturerCockpit Display ModelData Converter (LRU1)Fuel Sender Output CapabilityInstrument Input Capability
1JP InstrumentsEDM 900N/AVoltage 0-5 VDC0-4.7 VDC
2JP InstrumentsEDM 930N/AVoltage 0-5 VDC0-4.7 VDC
3JP InstrumentsEDM 900N/ADigital Frequency 64Hz-10kHz0-100 kHz
4JP InstrumentsEDM 930N/ADigital Frequency 64Hz-10kHz0-100 kHz
5Electronics InternationalMVP-50EDC-33PVoltage 0-5 VDC0-18 VDC
6Electronics InternationalCGR-30EDC-33PVoltage 0-5 VDC0-18 VDC
7Electronics InternationalMVP-50EDC-33PDigital Frequency 64Hz-10kHz0-6 kHz
8Electronics InternationalCGR-30EDC-33PDigital Frequency 64Hz-10kHz0-6 kHz
9Ultra FEIAuracle CRM2120N/AVoltage 0-5 VDC0-5 VDC
10Aerospace LogicFL25XN/AVoltage 0-5 VDC0-5 VDC
11Aerospace LogicFL20XDN/ADigital Frequency 64Hz-10kHz10-300 Hz
12Aerospace LogicFL21XN/AVoltage 0-5 VDC0-1 VDC
13Aerospace LogicFL20XN/AVoltage 0-5 VDC0-1 VDC
14GarminG1000GEA 71Voltage 0-5 VDC0-5 VDC
15GarminG950GEA 71Voltage 0-5 VDC0-5 VDC
16GarminG1000GEA 71Voltage 0-5 VDC0-1 VDC
17GarminG950GEA 71Voltage 0-5 VDC0-1 VDC
18GarminG1000GEA 71Digital Frequency 64Hz-10kHz0-100 kHz
19GarminG950GEA 71Digital Frequency 64Hz-10kHz0-100 kHz
20Rochester GaugesFQ-40XX SeriesN/AVoltage 0-5 VDC0-1 VDC
21JP InstrumentsEDM 960EDM 950Voltage 0-5 VDC0-4.7 VDC
22JP InstrumentsEDM 960EDM 950Digital Frequency 64Hz-10kHz0-100 kHz
23GarminG500/G600 TxiGEA 110Voltage 0-5 VDC0-5 VDC
24GarminG500/G600 TxiGEA 110Digital Frequency 64Hz-10kHz0-30,000 Hz
25GarminG2000GEA 71Voltage 0-5 VDC0-1 VDC
26GarminG3XGEA 24Digital Frq 64Hz-10kHz, Vlt 0-5 VDC0-100 kHz, 0-5 VDC
27DynonSkyview HDXN/AVoltage 0-5 VDC0-5 VDC
28GarminGI 275GEA 24Digital Frq 64Hz-10kHz, Vlt 0-5 VDC0-100 kHz, 0-5 VDC
29N/AC662041-0101/2N/AVoltage 0.01-2.78 VDCVoltage 0.01-2.78 VDC
30GarminG3XGEA 24Digital Frq 64Hz-10kHz, Vlt 0-5 VDC0-100 kHz, 0-5 VDC
31DynonSkyview HDXN/AVoltage 0-5 VDC0-5 VDC
32GarminGI 275GEA 24Digital Frq 64Hz-10kHz, Vlt 0-5 VDC0-100 kHz, 0-5 VDC
33N/AC662041-0101/2N/AVoltage 0.01-2.78 VDCVoltage 0.01-2.78 VDC

They work flawlessly. Installed with a JPI 900 engine instrument. Finally, we have accurate fuel readings.

- Steven Lindrooth
Grumman AA-5B Tiger

CiES Fuel Senders


Our fuel senders are constructed with hard anodized aluminum with a Teflon coating. A 2011-T3 Aluminum arm and other high-quality components round out these superior fuel level sensors.

CiES Fuel Senders

Installation Instructions

For general installations, you can download installation instructions in pdf format or use our online installation instructions index to go directly to the desired section.

Cessna fuel sender

YouTube Install

Follow along as Bill Goebel of Decatur, Texas upgrades his 1956 Cessna 182. Bill removes the old wingpit fuel indicators and replaces them with new CiES fuel senders and an Aerospace Logic fuel gauge. Watch as he overcomes some space constraints in this 70 year-old aircraft, and check out his neat and tidy wiring. If you find his video helpful, consider liking and subscribing.

YouTube video

* By providing a link to this video, CiES Inc. does not approve of this fuel sender installation. This video is provided for entertainment purposes only. Please read all of our documentation and install accordingly. If you have questions, please contact us directly.

CiES Explains

What is a fuel sender?

Fuel senders are components of your aircraft's fuel system responsible for measuring the level of fuel in the fuel tanks and sending that information to the fuel gauge.

The fuel senders are located inside the aircraft's fuel tanks and consists of a nitrile rubber (NBR) float, a hard-anodized aluminum rotor and housing, nickel-plated Neodymium magnets, complex electronic equipment (outside the fuel tank) and other quality components.

As the level of fuel in the tank changes, the float attached to the fuel sender also changes position. The float arm moves inside the rotor, which is connected electronically to the fuel gauge. When the fuel tank is full, the float will be at the top of the tank, causing the magnetic resonance system to send a signal to the fuel gauge indicating that the tank is full. As the fuel level in the tank drops, the float will move down, causing the system to send a signal to the fuel gauge indicating fuel level has decreased.

With over 100,000 CiES fuel tank level sender units in the field and 900,000+ hours of trouble-free operation, we are a trusted ally of GA owners and quality aircraft manufacturers. In addition, CiES exceeds 90,000 hrs. mean time to failure (MTTF), making our fuel quantity one of the most reliable aviation systems in existence.

cies fuel tank senders

The most accurate fuel senders I’ve ever had in a piston single! The ones in my SF.260 work with a Garmin EIS system.

- David Tan
SIAI Marchetti SF.260

corroded float sender
CiES Explains

Common symptoms and problems with bad fuel senders

A fuel sender is a component of an aircraft fuel system that measures the amount of fuel in the fuel tanks and sends that information back to the fuel gauge. When a fuel sender goes bad or fails, the fuel gauge may not accurately display the fuel level. This can be frustrating and potentially dangerous.

Here are some symptoms of bad fuel sender units:

  1. Inaccurate fuel gauge readings: The most common symptom of a bad fuel sender is an inaccurate fuel gauge reading. The gauge may read full when the tank is actually empty, or vice versa.
  2. Fluctuating fuel gauge readings: Another symptom of a bad fuel sender is a fuel gauge that fluctuates between full and empty, even when the tank is neither full nor empty. It may also behave erratically.
  3. Fuel gauge needle sticking: A fuel gauge needle that sticks in one position or doesn't move at all can also be a sign of a faulty fuel sender.

Do you need to purchase new fuel sending units for your aircraft? Fill out our order form here.


Next Generation Can Trust Their Fuel Gauges.

We’re committed to providing an accurate, safe and reliable fuel level reading, as well as providing you with the highest level of service. Once you have installed magnetic field fuel sensing, your fuel level sensing problems will be solved. When you see the difference, you’ll always choose us for your fuel and liquid level sending needs.