i'm not sure where to post this question, so feel free to move it to the rigth forum.
I'm actually working on a datalogger to log temperature, o2, co2 and humidity to sd card in caves.
I'm looking to a cheap Arduino box, closed and enough high to fit Arduino UNO r3, a shield and power source. External power could be OK but i prefer an internal power source).
Due to external environment (water, humidity, dust) the box should have minimal open holes (maybe none).
If you don't really care about how it looks then you might consider one of those plastic food storage containers with the snap-on lid. Cheap and readily available in a range of sizes at your local grocery store. Plus if you choose a clear one you can still see if the LED's are blinking without opening it up.