A professional who inspects and tests thermostat bellows for conformance to established standards, using test stand and charts. Responsibilities include:

• Examines bellows for surface defects, such as dents, cracks, or pits.
• Inserts bulb end of bellows assembly into dry ice to lower temperature of liquid in bulb to below zero.
• Connects bellows assembly to fitting on test stand.
• Turns dial on test stand to indicate zero reading.
• Removes bellows assembly from dry ice and inserts bulb end into tank of water heated to specified temperature.
• Reads test stand gauge to ensure expansion height of liquid in bellows conforms to specifications.
• Rejects bellows if defects exceed established standards or tags bellows for rework.
• Maintains records of bellows tested and rejected from each lot.