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https://www.jisc.go.jp/eng/

• JIS

Water Resistance ∞

• https://www.photoreview.com.au/tips/buying/Waterproofing-Options-for-Digital-Cameras/

• https://www.opticsplanet.com/howto/how-to-dust-water-resistance.html

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• JIS 0 — No special protection
• JIS 1 — Vertically dripping water shall have no harmful effect (Drip resistant 1)
• JIS 2 — Dripping water at an angle up to 15 degrees from vertical shall have no harmful effect (Drip resistant 2)
• JIS 3 — Falling rain at an angle up to 60 degrees from vertical shall have no harmful effect (Rain resistant)
• JIS 4 — Splashing water from any direction shall have no harmful effect (Splash resistant)
• JIS 5 — Direct jetting water from any direction shall have no harmful effect (Jet resistant)
• JIS 6 — Direct jetting water from any direction shall not enter the enclosure (Water tight)
• JIS 7 — Water shall not enter the enclosure when it is immersed in water under defined conditions (Immersion resistant)

• JIS 8 — The equipment is usable for continuous submersion in water under specified pressure (Submersible)

Dust Ingress Protection ∞

• Grade 4 — Protected against solid foreign objects 1,0 mm diameter and greater.
• Grade 5 — Dust protected. Ingress of duct is not totally prevented, but dust shall not penetrate in a quantity to interfere with satisfactory operation of the apparatus or to impair safety.

• Grade 6 — Dust tight. No ingress of dust.