Some time ago I purchased an Actron CP7875 PocketTherm Infrared Thermometer from Amazon. It’s a cool gizmo. I highly recommend it. You point it at whatever, and it tells you the object’s temperature based on infrared emissions. Today, Amazon informed me that people who bought the Actron PocketTherm also might like this:
The accompanying description describes it as “the most basic tool for any ghost hunter.” I cannot attest to its usefulness.