purchase a photoionization detector (PID). A PID is uses an ultraviolet lamp to ionize vapor molecules. PID measures in parts per million (ppm), not %LEL. This PID measure fuel vapors before a person enter a tank. The concentration of JP-8 vapor must be below 600 ppm before tank entry is authorized.PID Operations: The PID shall be calibrated with nonane or a JP-8 gas surrogate. The ultraviolet lamp shall have power of at least 10.2.-10.6eV.
We need this IAW T.O 1-1-3. This is a mandatory item
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