The 19-year-old striker, who enjoyed a spell with Southend last season, is eligible to make his debut for Paul Cook’s men at Torquay this weekend and is making no secret of his goalscoring ambitions.
“I’m very happy to come to Accrington,” said Sampson.
“Hopefully I can crack on and start the game on Saturday. I’ve got a little bit of experience at this level and it took me quite a while to get used to the facilities in League Two but I think that’ll help me and I can cope well.
“People say loans are to get minutes on the pitch but I want to get goals. I want to try and average a goal a game.
“There was interest from teams lower down this division but I wanted to come to a club with a winning mentality that wants to do well and win games.”
Watford boss Javi Gracia does not think Abdoulaye Doucoure's form will be affected by his omission from France's latest squad.