CiES brings fuel quantity into Garmin’s Crew Alerting System (CAS) through fail-evident design and digital communication, advancing fuel awareness for legacy aircraft
April 10th 2026 — CiES announced today that legacy Cirrus G3 aircraft can achieve a meaningful step forward in fuel awareness through the Garmin Perspective+ upgrade, creating a clear modernization pathway from legacy indication to a more integrated, fully monitored cockpit fuel-state architecture.
In G3 aircraft, analog senders supported a conventional configuration with only gauge-based low-fuel warning. Fuel quantity was available to the pilot, but it remained largely isolated from the avionics workflow.
With CiES, that changes.
By bringing fuel quantity into Garmin’s Crew Alerting System (CAS) through fail-evident design and digital communication, CiES enables a fully monitored fuel state and materially improved CAS messaging. The result is a more integrated fuel awareness model that supports earlier recognition, better messaging, and stronger pilot confidence.
“Fuel gauges have always had a reputation,” said Scott Philiben, President of CiES. “We built ours by doing it better. This is not just a sender replacement. It is a fuel-awareness upgrade that brings fuel quantity into Garmin’s Crew Alerting System with fail-evident design, digital communication, and the monitored performance behind Accuracy Before Empty™.”
The capability progression is clear. G3 relied on analog senders and gauge-based low-fuel warning. G5 / Perspective+ with CiES brings fuel quantity into Garmin’s Crew Alerting System through fail-evident design and digital communication, enabling a fully monitored fuel state and improved CAS messaging. In G6 and G7, that same CiES-enabled architecture supports the next layer of integration, including digital quantity representation, Fuel on Board functionality, imbalance monitoring, and fuel tank change messaging.
This shift represents more than an instrumentation update. It is an architectural move from standalone indication to integrated fuel awareness. Stable digital measurement, fail-evident design, and clean avionics communication support stronger system visibility and a more cohesive cockpit experience across the usable fuel range.
That design philosophy has also helped define the market reputation of CiES. By eliminating mechanical wear interfaces and delivering stable, repeatable digital performance, CiES has established a high-trust fuel quantity solution for operators seeking both modernization and confidence in the cockpit.
At the center of that value proposition is Accuracy Before Empty™ — the CiES commitment to consistent, certification-backed performance across the usable fuel range, where reliable fuel information matters most. For legacy G3 operators, the Garmin Perspective+ upgrade paired with CiES technology provides a direct path to better awareness, better messaging, and a more modern fuel-state experience.
About CiES
CiES designs and manufactures advanced fuel quantity systems for general aviation and transport applications. Through solid-state sensing, fail-evident architecture, and digital avionics integration, CiES has earned a strong reputation for delivering reliable, repeatable fuel measurement and advancing cockpit fuel awareness.
Media Contact
Danielle Quirk
CiES
[email protected]
Accuracy Before Empty™
Fuel quantity indication is provided in accordance with applicable FAA certification standards. Pilots must operate the aircraft within approved limitations and procedures