Dust tight
No ingress of dust; complete protection against contact (dust tight). Test duration of up to 8 hours based on air flow.

Immersion, 1.5cm ~1m depth
The products are suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. With Dan-Chief Water Proof types of connectors, could be under water. And, not only in such a manner that it produces no harmful effects. The test depth and duration is expected to be greater than the requirements for IP67.
Test duration: agreement with manufacturer and 3rd party certification
Depth specified by manufacturer, generally up to 1M ~ 1.5M more than 30 mins.