Actaris g4 gallus 2000 and FLS02-F1

Hi.

I have an actaris g4 gallus 2000 gas meter:

specs: http://www.minolusa.com/pdf/ACTARIS%20--%20Gallus%202000%20Specs.pdf
installation guide: http://www.follinflo-controls.com/PDFs/diaphragms/Gallus2000_Install_wir...

Do you know if the FLS02-F1 would work with it ?

The page in the shop only says "The probe is compatible with the Elster BK-G4/BK-G6 and the Actaris G4RF1 gas meters."

There is a magnet (I check with a compass), but it does not trigger the Hall effect sensor I tried on it.

More information here about the sensor and what I have done already:
http://openenergymonitor.org/emon/node/1732

I chose a Hall effect sensor instead of a reed switch to avoid having to deal with debouncing. From the price, I guess the FLS02-F1 has debouncing included. Is this correct ?

How is the FLS02-F1 interfaced ? I see only two cables on the picture. Is the ground in the foil ?

Thanks