How to Build a Waterproof Pressure Sensor

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Apply Liquid Electrical Tape

Apply a layer of liquid electrical tape to the board (a coffee stir stick is a good applicator).
After every layer, wait at least ten minutes before applying another one. Very carefully visually inspect to ensure total coverage.
Ensure that you do not cover the sensor itself, as it needs to be exposed in order to measure pressure. A small piece of tape can cover and protect the sensor during application.

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