Bellows Tester

Examine thermostat bellows for conformance to established standards.
picture of Bellows Tester

Quick Stats


Salary Range
$20,000 – $56,000

Data from U.S. Department of Labor


What do Bellows Testers do?

Inspects and tests thermostat bellows for conformance to established standards, using test stand and charts: 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.


Should I be a Bellows Tester?

You should have a high school degree or higher and share these traits:
  • Reliable: You can always be counted on to do a good job.
  • Independent: You enjoy flying solo and doing things your own way.
  • Trustworthy: You are known for your personal integrity and honesty.

  • How to become a Bellows Tester

    Most Bellows Testers have no higher education and get on-the-job training. Think about earning a Certificate or Associate's degree to increase your competitiveness in the field. Chart?chd=s:9zcaaa&chl=no+college+%2869%25%29|certificate+%2828%25%29|associate%27s+%283%25%29|||&cht=p3&chs=466x180&chxr=0,69,69
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