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Your Senders Are Too Accurate
One of the more unusual comments we occasionally hear about CiES fuel senders is that they can seem “too accurate.” At first, that sounds like a contradiction. How could a fuel quantity system be too accurate? Usually, what the pilot is actually noticing is not an accuracy problem at all. It is the difference between…
Upgrading the Panel? Don’t Leave Your Fuel Quantity System Behind.
Modern avionics upgrades can transform an aircraft. New displays provide better situational awareness, improved engine monitoring, integrated navigation and an entirely different level of information management than the instrumentation they replace. Owners routinely invest significant amounts of time and money modernizing the panel, wiring and electrical architecture of an aircraft. Yet one of the most…
When Fuel Quantity Goes Up in Flight
What Accurate Fuel Measurement Reveals in the Early Beechcraft Bonanza Fuel quantity normally has a very predictable relationship with time: start the engine, fly the airplane, and the indicated quantity goes down. In some early Beechcraft Bonanzas, however, that assumption is not always correct. The fuel system used in early Bonanza models equipped with the…
The Myth That Runs Through the Whole System
It’s not just what pilots are taught. It’s what pilots quietly work around, what mechanics tolerate, what investigators assume, and what certification lets slide. “Running out of fuel is the stupidest thing you can do.” Every pilot agrees with that sentence. That’s exactly the problem. Say it to the pilot who always tops off the…
Legacy Cirrus G3 Aircraft Gain Modern Fuel Awareness with CiES and Garmin Perspective+
CiES brings fuel quantity into Garmin’s Crew Alerting System (CAS) through fail-evident design and digital communication, advancing fuel awareness for legacy aircraft BEND, Ore. — March 31, 2026 — CiES announced today that legacy Cirrus G3 aircraft can achieve a major step forward in fuel awareness through the Garmin Perspective+ upgrade, creating a clear pathway…
Expanding Fuel Measurement for the De Havilland Beaver
The De Havilland Canada DHC‑2 Beaver is one of the most respected and widely used utility aircraft ever built. Known for its rugged design and exceptional short takeoff and landing (STOL) performance, the Beaver continues to serve operators around the world in demanding environments—from bush flying and float operations to tourism and cargo transport. Accurate…
CiES Receives EASA STC Approval for Fuel Quantity Indicator Senders
We’re excited to announce that CiES has officially received EASA Supplemental Type Certificate (STC) 10089240, further expanding global approval for our fuel quantity indicator sending units. This approval from the European Union Aviation Safety Agency (EASA) authorizes the installation of CiES replacement fuel quantity indicator sending units on eligible aircraft models listed in the FAA…
CiES Incorporated Receives ANAC Approval for Installations in Brazil
CiES Incorporated announces that it has received approval from Brazil’s National Civil Aviation Agency (ANAC) for the installation of CiES fuel quantity systems on eligible aircraft registered in Brazil. The approval authorizes installation under ANAC Supplemental Type Certificate No. 2023S09-08 and its associated approved model list, enabling CiES magneto-resistive fuel senders to be installed in…
Tech Tip: Bonding Strap Ground vs. Signal Ground
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…
Rethinking Fuel Tank Calibration: Why “Reverse” May Be the Right Direction
Overview While most STC installation manuals — including our own — instruct you to calibrate fuel tanks starting from empty to full, there are real-world cases where reverse calibration (starting full and draining in known increments) delivers better accuracy. For bladder-style fuel tanks — especially in certain Beechcraft and Cessna aircraft — this method better…
Top 5 Fuel Sender Problems Solved with Advanced Technology
For aircraft owners and pilots, reliable fuel management is crucial. A malfunctioning fuel sender—the device that measures and transmits fuel level data to the cockpit—can lead to inaccurate readings, unnecessary stress, or even critical safety issues such as fuel exhaustion. Fortunately, advancements in fuel sender technology have made significant strides in addressing these common challenges.…
CiES and Raisbeck Engineering Collaborate on Caravan Fuel System Upgrade
At CiES, we’re redefining fuel quantity measurement with our industry-leading magneto-resistive technology. Now, in collaboration with Raisbeck Engineering, we’re proud to introduce an advanced fuel quantity indication system specifically designed for the Cessna 208 Caravan. This state-of-the-art solution delivers unparalleled accuracy and reliability, enhancing fuel management and overall safety for Caravan operators. Key Features: 1.…
