This gives a sense of heat. Possible uses are as follows:

1. To guess the power of lasers, plasma, etc. and to warn of such oncoming attacks.

2. To similarly guess the power of fire and to warn of oncoming fire.

3. To detect if a material is safe to handle (i.e. not burning hot).

4. Human beings, animals, and other give off distinct heat patterns. Thus, this can be used as a radius sense.

5. It can be used, at close distances, as a thermometer.

And other uses. I can't list them all, because A. I can't think of all of the possible uses of a heat sense and B. I don't want to hand the power and creativity on a silver platter. A good RPGer will quickly develop uses for it that I haven't listed.