As having someone in my family that suffers from type 2 diabetes, I made a small collection of insulin glass vial. I’ve tried to think about some uses for those vials and Voilà! I had the idea to use a vial as a waterproof casing for a digital temperature sensor.
The sensor I’ve used it’s the well known DS18B20. I bought few pieces some time ago, but I had a hard time thinking about what kind of casing to use with it in order to keep it clean and dry while measuring the temperature from outside. The answer to that problem is using the insulin glass vial.