A state-of-the-art, digital-display Fuel Quantity Indicating System (FQIS) for 690A/B Twin Commanders is available for retrofit. The new system, which replaces the existing analog indicator system, features a digital LCD cockpit display with Low Fuel Warning indicator, a quick-disconnect wiring harness, and a remote processor unit. Capacitance probes immersed in the fuel tanks consist of two conductive plates separated by a dielectric. A remote processor unit converts the capacitance signal to proportional DC voltage, which drives the cockpit display. The system provides SFAR 88 protection against ignition sources in the tank, including lightning strikes. The FQIS was subjected to extensive ground and flight tests before earning FAA supplemental type certification. For more information call (360) 435-9797 or visit www.twincommander.com.
