What is the max underwater depth of the UbiSwitch?

We are planning to use the UbiSwitch in an underwater environment and would like to know about the details regarding its maximum underwater operating depth.

It’s been tested to be pressure tolerant up to 6000PSI. This corresponds to a depth of 4200 meters under water.

Has there been any other modifications or is that the tests with the most recent model?

Both revision A and revision B have been tested