An implantable device monitors a pressure of fluid within an inflatable portion of a gastric band. The implantable device comprises a tube defining a lumen, and a pressure sensor positioned within at least one of the lumen or the tube. The pressure sensor is configured to sense the pressure of the fluid within the inflatable portion of the gastric band. The pressure sensor is also configured to transmit a pressure signal based on the pressure to a microcontroller, which transmits the pressure signal to a remote control device. The pressure sensor confers strain relief upon at least a portion of the tube, and the pressure sensor shields at least a portion of the tube from puncture by a needle.