Specify
Identify water, dust, chemistry, temperature, pressure and duration.

Water resistance, saltwater resistance and protective enclosures are different engineering requirements.
Commission your robot →Identify water, dust, chemistry, temperature, pressure and duration.
Consider seals, coatings, bellows, connectors, optical windows and replaceable covers.
Qualify the exact configuration. No universal waterproof or toxic-proof rating is assumed.
Each direction begins with a platform and feasibility assessment. Images show design concepts; performance and availability are agreed for the specific project.
One idea. Your own robot.
Commission