Last winter we reported on the CIES digital fuel sender retrofit for earlier Cirrus models. To recap, the modification is intended to better the accuracy of the original analog float-type fuel quantity senders used in first and second generation SR20 and SR22 aircraft.
The retrofit includes replacing all four of the existing fuel sensors with the CIES digital magnetoresistive sensors, in addition to replacing the stock analog fuel quantity gauge with the FL202G digital control head made by Aerospace Logic. It’s a so-called “smart gauge” that indicates fuel quantity both numerically and graphically, in addition to warning of fuel imbalance situations, should you forget to switch tanks.