Polygraph test commonly known as lie-detector test is conducted on accused during an investigation to find out if they are speaking the truth. We have often come across the name of this test during the investigation of any major crime. It is usually conducted following direction of the court.
Many may wonder how the polygraph test is done, which machine is used, how much does the machine cost, which companies manufactures it in India and abroad. The most crucial question one may be curious to know is whether any person or institution can buy a polygraph machine. Let us find out some of the answers.
The polygraph test is done to ascertain the truth or falsehood in the statement of an accused. In the polygraph machine, the signal coming from the sensors attached to the person’s body is recorded on a moving paper (graph) and through this, it is detected whether he is telling the truth or lying.
Which Companies Manufacture Polygraph Machine?
Presto Infosolutions: This company is the top provider of polygraph machines in the India. It manufactures polygraph machines used especially by security and law enforcement agencies.
Medicam: The polygraph machines manufactured by this company are widely used by government agencies and private sector companies.
Reliable Testing Solutions: This company also provides polygraph test devices and other forensic devices.
Lafayette Instrument Company: Among global brands, this US based company is the world’s top global polygraph machine supplier that manufactures advanced devices. It supplies polygraph machines to government agencies around the world.
Apart from this, Stoelting Co. (USA) and Keeler Polygraph (USA) are also America’s renowned polygraph device manufacturers.
Who Can Buy a Polygraph Machine?
Polygraph machines are mainly procured by the government investigative agency. Apart from this, security agencies and private investigation agencies can also buy polygraphs. A private entity or individual can also buy a polygraph machine but they have to give a valid reason for this.
While in some countries private individuals are allowed to buy polygraph machine under legal rules, in some countries, they need to get license or permission from the government for it.
How Much Do Polygraph Machines Cost?
The prices of polygraph machines depend on their size, brand and model. However, the price of the basic analog model ranges between Rs 2.5 lakh to Rs 4 lakh. The prices of advanced digital polygraph machine can range goes from Rs 8 lakh to Rs 12 lakh. The prices of these machines may exceed based on advanced features as per needs.
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