The purpose of a polygraph test is to determine the truth or falsity of a defendant's statements. (Getty Images)
One of the most common tests detectives perform to get to the bottom of a crime is the polygraph test. Let’s find out more about the “lie detector”, who makes it, how much does it cost, and whether anyone can own it
A lie detector test, often called a lie detector test, is a test given to defendants during an investigation to determine whether they are telling the truth. In the course of investigating any major crime, we often come across the name of this test. This is usually done on the orders of the court.
Many people may wonder how polygraph test is conducted, which machine is used, how much does the machine cost, which companies in India and abroad manufacture it. The most critical question people may want to know is whether any person or institution can purchase a polygraph. Let's find out some answers.
The purpose of a polygraph test is to determine the truth or falsity of a defendant's statements. In a lie detector, signals from sensors attached to a person are recorded on a moving paper (chart), through which it is possible to detect whether he is telling the truth or lying.
What companies make polygraphs?
Presto Information Solutions: The company is the top provider of lie detector tests in India. It produces polygraphs specifically for use by security and law enforcement agencies.
drug: The company makes polygraphs that are widely used by government agencies and private companies.
Reliable testing solutions: The company also provides polygraph testing equipment and other forensic equipment.
Lafayette Instruments: Among global brands, this US-based company is the world's top polygraph machine supplier, producing advanced equipment. It provides polygraphs to government agencies around the world.
In addition, the American Stoelting Company and the American Keeler Polygraph Company are also famous polygraph manufacturers in the United States.
Who can purchase a polygraph?
Polygraphs are purchased primarily by government investigative agencies. Apart from this, polygraphs are also available for purchase by security agencies and private investigation agencies. Private entities or individuals may also purchase polygraphs, but they must give a valid reason for doing so.
While in some countries, the law allows private purchase of polygraphs, in some countries, they require a license or permit from the government.
How much does a polygraph test cost?
The price of a polygraph depends on its size, make, and model. However, the base analog model is priced between Rs 2.5 lakh and Rs 4 lakh. The price of advanced digital polygraph machines ranges from Rs 8 lakh to Rs 12 lakh. The prices of these machines may exceed depending on the advanced features required.
