I need to make a sort of thermometer that can go into a pond (i.e. is waterproof and weatherproof) and can give a constant readout. I've found a waterproof thermometer, I just need to figure out how to get a constant reading (in Fahrenheit) on a simple display (maybe LCD, if possible?). As for the location of the device, it will be outside near the pond mounted on the post, and there is a power outlet right on the side of the pond.
Any help would be greatly appreciated.
Why the need for a "constant" readout? Are you looking for many decimal places in the temperature? How about 1000 times per second? How fast will the pond temperature change?
Paul
This can hardly be seen as an Arduino problem. The most difficult part of it is getting a convenient installation, and you don't even appear to have a problem there. In the meantime $2-50 on eBay will get you a nice little battery powered LCD thermometer that will do the job just fine - no power outlet needed. The most you will need is some heatshrink over the probe.
If you are doing this for some other reason, there is a good tutorial here
You might find it easy to adapt a local standard weatherproof power outlet box to take an Arduino, possibly matching that which you already have.
