Pressure sensor housing and pressure sensor being disposed inside a heater block

A pressure sensor system comprising:

• a pressure sensor housing comprising a hollow member including a cylindrical side surface extending along a predetermined axis core, an upper surface connected to the side surface, and a lower surface connected to the side surface;
• a pressure sensor element accommodated inside the hollow member, the pressure sensor element configured to detect a pressure of a fluid;
• and
• a heater block with a cylindrical space inside, the cylindrical space having an axis core and accommodating the hollow member;
• wherein
• an entire circumference of the side surface of the hollow member is surrounded by an air layer in a first posture in which the axis core of the cylindrical space is aligned with the predetermined axis core of the hollow member, and
• the side surface of the hollow member is in contact with a wall surface defining the cylindrical space at a plurality of points at the same time in a second posture, the second posture being at least one of postures in which the predetermined axis core of the hollow member is eccentric with the axis core of the cylindrical space.