Town’s head of football operations Leigh Bromby told the club’s website: “Following the injury to Ryan Schofield, we felt it was important to have another senior goalkeeper in the group.
“Being able to attract a player with Joel’s ability shows the direction we are going in. Players believe they can develop under (head coach) Carlos (Corberan).
“Pereira is a really interesting option for us and fits the way we want our goalkeepers to play.”
The Portuguese keeper is contracted to United until 2021 and will need to impress at Town if he has any chance of earning an extension.