What I want to do
Using the Arduino Uno, we have made a device that measures temperature and conductivity for water quality monitoring purposes. Our challenge is building a container that will protect the arduino from water damage that is durable and affordable. We hope that our approach can serve others who are also trying to find ways to waterproof their devices.
My attempt and results
3 in. x 2 ft. PVC Sch. 40 Pipe 3in. PVC DWV Cap 3 in. PVC DWV Hub x FIPT Female Adapter 3 in. PVC MIPT Cleanout Plug Pipe Joint Compound Silicone II Kitchen & Bath Clear Caulk w/ BioSeal Solid Rubber Stopper Stainless Steel Screws Purple Primer PVC cement
1. The PVC pipe was cut down to roughly 5 inches.
2. Outlets were made to fit thethermistor and conductivity probes (stainless steel screws) through the Cleanout Plug
The hole for the thermistor was made large enough to fit a 1/2 in. x 5/16 in rubber stopper.
The thermistor was threaded through the rubber stopper through a whole made with a small drill bit.
Testing the thermistor & conductivity probes
3. Putting the parts together
You can follow this easy "how-to" guide for proper application of the primer and cement.
For easy access to the arduino hardware, the cap equipped with thermistor and conductivity probe screws on and off.