Special instruments not needed as long as you’re packing a small mirror. A compact mirror will do to lead you to the spirit that possesses your backyard.
So you want to track a ghost?
The mirror will lead you to clues and indicate if you’re on the right path or are experiencing a full-blown contact. The apparition may come at you and invited guests in several ways.
Hold the mirror where it will catch light. It can be moonlight; light reflected from lampposts, porches, neighbor’s yards or a flashlight that you are carrying as long as it’s lowlights and not a direct light on the mirror.
Hold the mirror out at an angle and slowly walk the yard as if you are engaged in a metal detector. At a side-glance the mirror can show you motion. The detection of motion at a glance may not fully cross the mirror but parts of it. You might not see a fast glance of motion go from side to center cross to the other side but you could see a blur dart from one angle to another on the mirror or from side to center and back or from up, down and back.
The mirror is a motion sensor any blur the ghost chooses to use goes. Follow the direction of motion whichever way that the blur went.
Constantly monitor the mirror for fog. If the mirror begins to fog over or any part of the mirror fogs you may be experiencing the breath of the ghost on your mirror.
If you touch the mirror and it feels cold the ghost may be causing it. Be careful not to smudge the mirror when you touch it as it can be confused with fog. At this time if your hand & arm feels cold you are by the ghost or are walking on top of the ghost. At any time your hand & arm, the ones holding the mirror, feels cold touch the mirror to see if it to is cold. Use the cold as a monitor so that you can know when to look for motion and fog in the mirror.
Cold air is a possible sign of ghosts. Any part of your body that feels cold you can use as an alert system that there may be an approaching ghost. Let the cold help you. Use it along with a mirror to see if you can track a ghost.