A polygraph instrument, commonly known as a lie detector, is a machine that measures certain responses in the human body to determine if a person is telling the truth or a lie. These machines generally require interpretation by an expert who is trained in reading the results, but machines are available for rent from some vendors. Some polygraph machine rental companies are basically selling a functioning prop for theatrical use, an antique piece of equipment that is functional, but not maintained for accuracy; while others are renting an actual polygraph service, complete with a trained expert to interpret the results or an offer for training.
Determine the kind of machine you need to rent, based on whether the use will be theatrical or actual.
Select a vendor from which to rent the equipment. This can be done thgrough the Internet or your local business listings.
Call to place the order for the machine and any training necessary. Be sure to have all of your payment information on hand, as well as the details outlining the specific need for the machine that might affect instructions for use.