You could not make this bollocks up! This is a Scientology E-meter.
YOu can get second hand ones on Ebay
An E-meter is an electronic device manufactured at the Church of Scientology‘s Golden Era Productions facility, and is used exclusively by the Church. The device is a variation on an ohmmeter, using a Wheatstone bridge to measure electrical resistance. It is used as an aid by Dianetics and Scientology counselors and counselors-in-training in some forms of auditing, the application of the techniques of Dianetics and Scientology to another or to oneself for the express purpose of addressing spiritual issues. The device is formally known as the Hubbard Electrometer, for the Church’s founder, L. Ron Hubbard.