What is an IR thermometer and why use one?
An IR thermometer is a thermometer that uses the infrared spectrum to detect temperature. They are useful because they can detect ambient heat so you can get readings in the middle of a room or outdoors. Unlike traditional thermometers, IR’s do not need to be stuck into an object to take a reading, they can actually measure air temperature. Since one theory of ghosts and hauntings holds that a ghost will take the heat from the air to get the energy to manifest, if a significant temperature drop is detected, chances are good that a ghost may be present.