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G.E.I.S.T. is a paranormal data logging system created by Stan Suho and Dale Kaczmarek of the Ghost Research Society located in Oak Lawn, Illinois. Developed in the 1990's, it is considered one of the earliest computerized data loggers for use in paranormal investigations. About a year after its creation Tim Harte developed his own system called M.E.S.A.

G.E.I.S.T. is acronym for Geo-physically Equipped Instrument of Scientific Testing. The DOS software was written in a form of BASIC by Stan and primarily consists of logging date and time for events triggered by external equipment that interfaces to a laptop.

External equipment is first connected to a "polling" circuit that samples voltage from each device. Devices connected to the data logger consists of a Negative Ion Detector, Radiation Geiger Counter, Tri-Field Natural EM Meter, Hydrogen Sulfide Detector, Passive Infrared Motion Sensor, and will remotely trigger a camera upon any event logged into the system. Future plans consist of adding thermal and optical analysis to the infrared and ultraviolet spectrum. Stan suffered an injury so future developments have been put on hold.

G.E.I.S.T. was used at Bachelors Grove cemetery during a 2008 film documentary hosted by Troy Taylor which was conducted under a permit issued by the County. During production the crew experienced power failures causing many audio and video problems. Automobiles permitted to be parked outside the cemetery gates were available for charging batteries. Charging them, however, was futile and the problems continued. The crew even resorted to the use of flashlights in order to continue filming subjects. All video footage is said to be lost and any audio was "garbled" and could not be recovered. Results from G.E.I.S.T. did not indicate anything unusual but the system has proven itself useful at other locations.

The entire data logging system is a mixture of hardware and software. Below are files pertaining to its history. For example, some hardware used with the system was custom built or modified. Two such custom built devices are a Negative Ion Detector and Geiger Counter.


Stan Suho setting up G.E.I.S.T.

Photographs sent in by Jim Graczyk of the Ghost Research Society, Oak Lawn, IL.