When installing our fuel quantity sensors, it’s important to know the difference between bonding strap ground and signal ground:
Bonding Strap Ground
A physical strap that ties the sensor body to the aircraft structure. This provides static discharge and EMI protection — shielding the sensor from noise.
Signal Ground
The black wire on your sender wiring harness. This connects to the aircraft’s electrical system ground, providing a clean reference for accurate data to your avionics.
The Incorrect Way
Installers could mistakenly connect the signal ground to the top of the unit, where only the bonding strap belongs.
👉 This causes electrical noise, unreliable signal readings, and can even lead to erratic fuel indications.
The Correct Way
- Strap Ground → to Airframe Structure
- Signal Ground → to Avionics System Ground
Need further assistance?
Or call us at +1 541-977-1043.
Photo Attribution of Bonding Strap Ground:
Marcnovac, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons, https://upload.wikimedia.org/wikipedia/commons/4/4f/Chassis_ground.jpg
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About CiES Inc.
Established in 2012, CiES is now the largest supplier of aviation fuel quantity probes and senders. They are the recognized leader in the design, development, certification, and manufacture of electronic sensor solutions for original equipment manufacturers, as well as direct-to-market consumer products. Through the creative application of cutting-edge technologies, CiES creates complex end-to-end solutions. This is a company that is changing the game in aviation technology and revolutionizing the way we navigate the skies. Aiming at future growth and innovation, CiES is pushing the boundaries of what is possible.
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