I put in the CAP senders.
My reasoning at the time:
. Modern system
. No moving parts
. Nothing to repair or go wrong.
. They will be able to measure fuel level from full to empty.
The things that I didn't consider at the time:
. You need to buy converters to hook up to most engine monitors
. If the were to require repair, you would most likely need to open the tank
back up. Or you could just replace it with the float sender.
Issues I have seen using the CAP sender:
. My archer wing tip Comm antenna would interfere with the
converter/engine monitor when I broadcast. I replace the antenna with
a belly one.
. Even after calibrating I sometime see incorrect readings. It usually reads
lower while in flight then on the ground. It seem to read lowest when
I am watching it more.
I have recently replaced my engine monitor with an EFIS. The fuel used is very accurate and is set to 5% high. I recalibrated both tanks. On a resent flight I was reading 4 gal in left tank and 6 in right tank. The fuel used was showing 21 used out the the 36 that I carry. When I refueled I added 20.3 gal.
Why didn't it know about the other 6?
Kent