“99% particle filtration” is not established by an IP68 label. A rugged phone's enclosure-protection claim should be documented for the actual device, rather than described as an unspecified filter-efficiency percentage. This guide verifies no Phonemax particle-filtration rate.
Ask which property is being claimed
Identify whether the supplier means enclosure protection, a speaker membrane or another component. Request the exact test reference, sample assembly and acceptance criteria. A percentage needs a defined measurement method and conditions; it should not be supplied from the IP digits alone.
- Match the report to the offered phone and fitted covers.
- Confirm permitted port opening and cleaning procedures.
- Include speakers, microphones and buttons in the functional review.
- Record any maintenance or use restrictions stated by the manufacturer.
Review the real work environment
Describe the dust encountered, exposure duration and handling routine to the supplier. Ask whether further material or operational checks are needed for that environment. Avoid improvised dust-blowing or immersion demonstrations.
Choose documented wording
IEC 60529 defines enclosure-protection classifications. Compare the current Phonemax range using exact-model documentation. Keep any percentage claim unresolved until its separate evidence is provided; this article contains no dust-chamber or filtration test result.
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