Temperature Change Theory

The temperature theory is when a ghost starts to manifest, it can cause drops in temperature called cold spots or even cause a hot spot. The hot spot rarely happens. If it is a cold spot the temperature should be around a 10 degrees drop in temperature. If you are using thermometers as part of your investigation, it is a good idea to get baseline readings for various areas of the building and rooms and make note of the in your investigation journal. These way you can refer back to them to see if there is a temperature drop.

There are IR thermometers that take the temperature of a direct object (the object it is being pointed at). There are also IR thermometers that take the actual air temperature and give you the temperature of a radius area around it.

Some IR thermometers also have a laser pointer on it to show you the direction you are pointing the thermometer.

Another theory regarding the paranormal and temperature is that when a ghost wants to come in contact with you to give you a sign they might generate wind.

Wind meters can tell you how fast the wind is blowing and in what direction it is coming from. Dramatic changes in temperature may cause sudden gusts of wind.

Another theory with temperature is, when a ghost is trying to manifest itself or wants to come in contact with you there might be a change in pressure. Again, an extreme change in temperature may cause a change in air pressure. Similarly, a sudden change in air pressure may precede a change in temperature. The meter to detect pressure is called a barometer.

The final piece of temperature related equipment you could use is Thermal Imaging.

This is a great piece of equipment because if you encounter a cold spot on a thermometer then you can view and track the cold spot with a thermo imaging camera to see exactly what it is. Thermal imaging equipment is, however, extremely expensive!