Hi everybody. I am thinking to buy a data logger to use with pulse induction detector and non motion detectors, but: How usefull is this device ?, I say that because we can see the images after this has been detected with a sound in our detector, then we have a sound in some place our survey indicating maybe metal, and we have to dig if we want know what is it, the logger never will say what is it, maybe how deep is it and no more, impossible to know if this is ferrous or not then where is the utility ?.