Ground Water detection

Ground water detectors in Dindigul, Tamilnadu

I'm planning to dig a borewell in my hometown (Dindigul, Tamilnadu). Our earlier 2 attempts failed. Since my place is a drought area and nearby borewells are more than 1000ft, I would like to know anyone who can help us to find the correct spot of water source with 100% accuracy. I do not believe in people who use coconuts, neem sticks for finding ground water.