Abstract: Provided is pressure sensor, including top cover assembly, upper seat, movable membrane; each of top and bottom of upper seat is provided with opening, top cover assembly seals opening at top of upper seat, movable membrane seals opening at bottom of upper seat; top cover assembly, upper seat, movable membrane form pressure reference chamber, and pressure sensor detects gas pressure on side of movable membrane away from top cover assembly based on state of movable membrane; at least one gas guide passage is formed at top cover assembly, and is configured to connect pressure reference chamber to outside; top cover assembly includes at least one blocking member configured to seal gas guide passage; and blocking member seals gas guide passage after being heated to temperature higher than preset melting temperature to be at least partially melted and being cooled to solidify. Manufacturing method for pressure sensor is further provided.

Abstract: There is provided a pressure sensor, including a top cover assembly, an upper seat (120), and a movable membrane (200); each of a top and a bottom of the upper seat (120) is provided with an opening, the top cover assembly seals the opening at the top of the upper seat, and the movable membrane (200) seals the opening at the bottom of the upper seat (120); the top cover assembly, the upper seat (120), and the movable membrane (200) form a pressure reference chamber (100), and the pressure sensor detects a gas pressure on a side of the movable membrane (200) away from the top cover assembly based on a state of the movable membrane (200); at least one gas guide passage (510) is formed at the top cover assembly, and is configured to connect the pressure reference chamber (100) to the outside; the top cover assembly includes at least one blocking member (521) configured to seal the gas guide passage (510); and the blocking member (521) seals the gas guide passage (510) after being heated to a temperature higher t