One of the most sensitive dowsing devices is the aurameter rod. As its name suggests, it was initially designed to look at human auras, acupuncture points, spinal stress points, rates, signatures, auric holes, or weakened areas of the body. But it also works for map dowsing and finding water, oil, minerals, or buried treasure.

Advantages: it is excellent at defining outer perimeters of energy fields, or for following underground veins of primary water, or other less than straight energetic phenomena.