A professional who inspects assembled gas masks for conformity to specifications. Responsibilities include:

• Examines chemical containers, facepieces, straps, and rubber hoses for defects, such as blisters, tears, and faulty stitching.
• Tests masks for leakage around glass eyepieces, using suction-cup device.
• Tests chemical containers for content, and for leakage under pressure, using gauge.
• Tests absorbing quality of chemicals, using smoke meter.