Every paranormal investigation group will have a list of equipment that they use and we are no different.

Listed below are some of my personal favorites.

K2 Meter
Voice Recorders
Infrared Cameras
Touch Flashlight
Our Laptop

Along with the above items one should have the following.

Batteries, batteries and more batteries

Red lensed flashlights. They are easier on the eyes during adjustment period

First Aid kit

Extension cords

Terminal strips

Duct tape

Carpenters level for varifiying the "Funhouse Effect"

Barometer

Various Thermometers

Two way radios for keeping in contact

The best things to take to an investigation are:

Paper and either pen or pencil

Open and clear mind

And finally, a great team