if you mean quantitavily (ie, "after peeing on this test strip, I know I have a testoterone count of 35ppm"), then I don't know of any.
If you mean in general, it can be figured out pretty well by looking at how the person acts/reacts in certasin situations. Higher level of testosterone tend to associate with shorter tempers, more desire for compitition/exersize, etc. And football. American football is like a testosterone magnet. Ruh,ruh,ruh! Rugby is the indicator anywhere else in the world.