@petej82 you sound as though you are looking for an artificial pancreas. No pumps yet check your glucose and then apply insulin accordingly.
The Medtronic 640G has a feature called smartguard that monitors your glucose levels and suspends your insulin delivery if it thinks your readings suggest you will soon go low.
The Medtronic 640G has a feature called smartguard that monitors your glucose levels and suspends your insulin delivery if it thinks your readings suggest you will soon go low.