Well,
I have a new invention. It should outperform all the existing el-ar-el devices. It is based on a revolutionary new laptop technology. No more rods, sticks, and so on. Simple to use. This is the prototype (see below). I'm working on the gravity anomaly feature now. So any black holes in our galaxy will extend it's detection distance to some revolutionary range: lightyear distances.
Watch out! I have found that it could probably detect dark matter too. Maybe the next revision could support DMNMR mode (dark matter nano magnetic resonance).
