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Are pressure gauges the only acceptable means for a visual determination that a fire extinguisher is fully charged?

Section § 393.95: Emergency equipment on all power units.

Guidance Q&A

Question 1: Are pressure gauges the only acceptable means for a visual determination that a fire extinguisher is fully charged?

Guidance: No, as long as there is some means to permit a visual determination that a fire extinguisher is fully charged.

Regulatory Topic: Visual determination that fire extinguisher is charged
Effective Date: Sunday, May 4, 1997
Issued Date: Friday, April 4, 1997