Digital meat thermometer that does not cause juice losses Sometimes when I'm trying a new cooking method that uses different cooking temperatures compared to what I use normally, I find it difficult to estimate when my roast/meat is done. 

Digital meat thermometers that make a noise when the internal temperature reaches a certain value are therefore attractive to me. However, when I have used meat thermometers (I have not used one of those digital thermometers where you leave the probe inside the meat during cooking) and penetrate the meat with the probe, juices start to leak out when I then remove the probe and the meat will start to dry out.

How do you usually deal with this? How do you use meat thermometers and prevent juice losses?

Another note: 
Is there an information sheet somewhere that tells you, approximately, how long you have to cook different kinds of meat products on a lbs basis to meet target internal temperatures or meat texture (e.g. rare, medium, well done, etc.)?
While I heartily recommend a remote probe thermometer that you can leave in your meat and have a readout outside of the oven, it is only for convenience. Piercing the meat with a thermometer (or fork, etc) isn't going to cause any significant loss of juice. You may rupture a couple of cells right where the thermometer went in, but that's it. Your meat isn't just a water-balloon of juices waiting to be popped, so you needn't worry.

Myth: Never use a fork to turn meat

Is it ok to probe my meat?