Some Information taken from http://www.paranormality.com/ghost_hunting_equipment.shtml
Candles and Matches
These are essential items especially if your flashlight and equipment stop working. Some ghost hunters believer that ghost energy can drain equipment energy and candles should be taken as a back up.
It is important that your camera has flash, don't forget a tri-pod to avoid camera shake.
A compass is not only very useful for navigation it is also great for picking up electromagnetic forces. A compass will react to any magnetic or electrical stimulus that may be out of the ordinary. For this reason it is probably better to avoid an electronic compass instead use the needle points north kind.
This is a small object such as a coin that is placed on a piece of white paper, which in turn is placed on a table or where it will not be disturbed. A pencil circle is drawn around the coin so that it's exact location is recorded. The coin and paper are then left and then re-examined at the end of the ghost hunt to see if the coin has moved. If it has, then this could indicate some strange activity. Ensure no-one can accidentally move the coin or you will obtain false results.
These are very useful and they are quickly becoming the item of choice for obtaining electronic voice phenomenon results.
Some researchers feel that the use of dowsing rods can help to pick up ghosts or answer questions relating to them
These detectors can pick up electronic fields over different frequencies. Disruptions in electronic fields could possibly mean ghosts. Prices range from $24 to $130.
These are essential because ghosts are thought to be electromagnetic and this can cause batteries to run down quite quickly. Extra batteries will be essential for all of the ghost hunting equipment that needs it.
Electromagnetic discharges can affect film and it may need to be replaced. Therefore it is important to ensure that plenty of spare rolls are accessible. Use 200 or 400 possibly 800 speed film, this will provide the best photographs.
Always have bright flash lights (usually 3 or 4) and extra batteries.
First Aid Kit
It is always useful to have a first aid kit.
Ghost Catcher (AKA Spirit Wind Chime)
These act in the same way as a normal wind chime, but as long as they are strategically placed away from drafts and wind, the theory is that it is a ghost that will make the chime work.
When operating as a team of three or more people, headset communicators are useful for staying in contact when spread out. Headset communicators, unlike their counterpart the walkie talkie allow the user to have their hands free to use other equipment such as cameras.
This device is useful for picking up any changes in air humidity.
These devices accurately pin point cold spots, thus saving on time and infrared film. Excellent for use in outside investigations. Prices range from $300 to $500. A non essential but useful item.
A good microphone is essential for picking up electronic voice phenomena.
To communicate to the spirit world
These are useful in case of an emergency they can also be affected by the presence of strange activity.
These devices are good for sensing movement when there should be none. One sensor can easily monitor an entire hallway or room. it is an ideal tool for indoor investigations.
Night Vision Equipment
Night Vision scopes can be very useful. Cheap night vision adapters are available that will attach the scopes to video cameras. However Night Vision Equipment can be expensive. Choose monocular or binocular equipment. Binocular are a good choice because they add the benefit of depth perception
Night Vision Video Camera
This device is similar to combining a video camera with a night vision scope and allows the recording of light not normally visible to the naked eye. A good investigative tool.
Always keep records of times and events, this is very useful for documenting the investigation and especially if the study is to be replicated. Pens and pencils are also essential.
Allow spirit to move the automatic writing tool to spell out messages and drawings relating to them
This is a useful material for covering the lenses of flashlights in order to prevent the light from being too blinding.
Some researchers claim that breezes sometimes accompany ghosts. Windchimes should be placed in areas where the ghost is thought most likely to appear and of course out of the wind or drafts. This is a simple system that can alert investigators to photograph the area.
These small battery powered spot lights help at night when setting up and taking down cameras and other equipment. They can also be used for safety and to get a better view of the surrounding terrain at night. Some of the most useful ones sit on the ground but have swivels on the lights enabling them to be set to different angles.
This is a useful substance for capturing footprints or handprints. Sprinkle it around on the ground around where the investigation is taking place.
Allowing spirit tocome close and communicate throught the movement of the table
Thermal Imaging Scopes
This device allows you to actually see what your thermal scanner detects. Should there be a cold spot, this infrared technology makes it possible to see the shape and size of the cold pot. Unfortunately this is still quite expensive equipment.
Rapid drops in temperature has often been associated with the presence of a ghost. As with the compass the old fashioned mercury filled, red-line thermometer is probably better than its electronic counterpart. A good thermometer can detect changes in room temperature quickly and where electromagnetic forces have been reported, an electronic device might fail or be wrongly affected.
This piece of equipment allows events to be captured as they are happening.
A good digital recorder and an external static free microphone should be in use at all times during a ghost hunt. Although nothing may be heard during the investigation there is a phenomenon called EVP (electronic voice phenomenon) whereby spirit voices have been known to appear on the recorder later after being reviewed.
These devices allow you to communicate with your ghost hunting party. If you are investigating a house and you have people scattered all over, walkie-talkies allow you to keep in touch.
An essential piece of equipment for recording the time when the events happen.