Apparently I have one in my arsenal. I found it the other day when I was going through the van looking for knock out fillers. I don't know if it still works.
I feel that it is necessary to have more than one different type of tester at your disposal. Where one tester does not produce reliable readings, a different one will produce an accurate reading. Also, it is my understanding that in extremely cold temperatures, a digital meter is almost useless.
