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NAICS Code 561611-10 - Polygraph Service
Marketing Level - NAICS 8-DigitBusiness Lists and Databases Available for Marketing and Research
Total Verified Companies:
146
Contact Emails:
210
Company Websites:
92
Phone Numbers:
137
Business Addresses:
146
Companies with Email:
82
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- Full Business & Mailing Address
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- Employee Count
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Looking for more companies? See NAICS 561611 - Investigation and Personal Background Check Services - 5,357 companies, 19,876 emails.
NAICS Code 561611-10 Description (8-Digit)
Polygraph service is a specialized industry that involves conducting lie detection tests using a polygraph machine. Polygraph tests are used to determine the truthfulness of a person's statements by measuring physiological responses such as blood pressure, pulse rate, respiration, and skin conductivity. Polygraph service providers work with clients from various industries, including law enforcement, government agencies, private companies, and individuals.
Parent Code - Official US Census
Official 6‑digit NAICS codes serve as the parent classification used for government registrations and documentation. The marketing-level 8‑digit codes act as child extensions of these official classifications, providing refined segmentation for more precise targeting and detailed niche insights. Related industries are listed under the parent code, offering a broader context of the industry environment. For further details on the official classification for this industry, please visit the U.S. Census Bureau NAICS Code 561611 page
Tools
Tools commonly used in the Polygraph Service industry for day-to-day tasks and operations.
- Polygraph machine
- Blood pressure cuff
- Pneumograph
- Electrodes
- GSR sensor
- Respiratory belts
- Ink pens
- Paper
- Computer software for data analysis
- Audio and video recording equipment
Industry Examples of Polygraph Service
Common products and services typical of NAICS Code 561611-10, illustrating the main business activities and contributions to the market.
- Law enforcement agencies
- Government agencies
- Private investigation firms
- Security companies
- Legal firms
- Human resources departments
- Insurance companies
- Pre-employment screening services
- Probation and parole offices
- Private individuals seeking truth verification
History
A concise historical narrative of NAICS Code 561611-10 covering global milestones and recent developments within the United States.
- The Polygraph Service industry has a long and controversial history worldwide. The first polygraph machine was invented in 1921 by John Larson, a medical student at the University of California, Berkeley. The machine was initially used to monitor the vital signs of patients during surgery. However, Larson soon realized that the machine could also be used to detect lies. In the 1930s, the polygraph machine was used by law enforcement agencies in the United States to investigate criminal cases. During World War II, the machine was used to screen military personnel for security clearance. In the 1960s, the Supreme Court of the United States ruled that the results of polygraph tests were not admissible in court due to their unreliability. Despite this ruling, the polygraph machine continues to be used by law enforcement agencies and private investigators worldwide. In recent history, the use of polygraph tests has become increasingly controversial in the United States. In 1988, Congress passed the Employee Polygraph Protection Act, which prohibits most private employers from using polygraph tests for pre-employment screening or during the course of employment. However, the law does allow polygraph tests to be used in certain circumstances, such as in investigations of economic loss or injury to the employer. In addition, some government agencies, such as the Federal Bureau of Investigation and the Central Intelligence Agency, continue to use polygraph tests as part of their screening process for employees. Despite the controversy surrounding the use of polygraph tests, the Polygraph Service industry continues to provide services to law enforcement agencies, private investigators, and government agencies worldwide.