Classifieds - For Sale/Trade

Polygraph instruments manufactured in the U.S. are subject to export control laws and regulations of the United States. Individuals must comply with such Export Laws and obtain any license, permit or authorization required to transfer, sell, export, re-export or import the Products. Individuals cannot export or re-export the Products to any country or entity to which such export or re-export is prohibited, including any country or entity under sanction or embargoes administered by the U.S. Department of Commerce, U.S. Department of State, and U.S. Department of Treasury. Contact the manufacturer if you need assistance transferring ownership of polygraph instrumentation.






Sale to include Pneumos, EDA sensor wire/finger plates,

blood pressure cuff and bulb, (bulb face has slight crack but

fully functional),  and webcam for recording, Logitech 720 HD, model.


The entire system is for sale as one unit.  Recent retirement from

polygraph work motivates the sale. 


Asking $2500.00 OBO.  Please contact Bob Hoxter,

[email protected]




My name is Mike Kelly and I have an old analog polygraph instrument I have for sale. 
As I mentioned on the phone, I have NO idea of what this is worth.  At the end of the day, obviously only what someone is willing to pay.  That said, I think I'd like to put it out there for $375 - I can't imagine it isn't worth more than that.
SO, all I know is what I see - this is a Lafayette Instruments "Diplomat DC III" analog instrument.  I believe it is a mid-80's vintage.  I am told it is complete with all accessories and works well.  The only issue it has is a need of battery replacement, but the unit works fine on AC power.
Over to you to elaborate and post however you wish.  You can include my name, email address ([email protected]) and phone number (703-554-3277) as a POC on this.


Like New Lafayette LX-4000 Polygraph Instrument with both pneumos, EDA wire with finger plates and hand pads (electro-dermal gel as well), blood pressure cuff and bulb, seat movement sensor, Brother Printer with three rolls of chart paper, webcam with desktop tripod and arm mount.   Asking $4,700 OBO.  If interested, please contact Ken Stauff, [email protected] 






Working Analog Polygraph Wanted
I am looking for an analog instrument for a film/tv prop work, not for real a test. I am based in the U.K. and would cover the shipping costs on top of the purchase price. 
Jason Hubble


A vintage (1970's) Stoelting three channel mechanical polygraph in Haliburton carrying case, with attachments, works but needs new hoses, $300.0.


Thanks in advance Jim Dawson


(707) 407-5852