On Feb 21, 8:29*pm, John Smith wrote:
In article
,
The float detached from the sender in the right main tank on the
PA32-300 I flew to Florida a year ago. The gauge was therefore inop.
The aircraft is equipped with a FS-450 fuel flow monitor. I used this in
place of the specific fuel gauge. The FS-450 is accurately calibrated to
within 0.2 gallons, much better accurate than the manufacturer's fuel
gauge.

Was I legal?

Offhand, I don't see why not. FAR 91.205b9 only requires a working
fuel gauge for each tank. It doesn't prohibit an additional, non-
working gauge.