Lie Detector Test Machine
The Lie Detector Test machine, commonly known as a polygraph, gets its name from the phrase “many writings” due to its ability to record multiple physiological responses at once. In the United Kingdom, it is often simply referred to as a Lie Detector. The polygraph was first invented in the 1920s by John Larson, a medical student and police officer, who designed it to assist law enforcement in detecting deception during investigations. His analog device marked a revolutionary step in combining science and criminal justice.
Over the decades, the polygraph has undergone significant advancements. By 1992, the traditional analog devices evolved into computerized systems, improving accuracy, reliability, and efficiency. These modern machines record and analyze data with precision, making them the standard tool for professional examiners worldwide. Today, computerized Lie Detector machines are relied upon in various fields, from criminal investigations to private inquiries, offering a robust method to assess the truthfulness of individuals.
Pictured below is a 1980s analog polygraph device, owned by Lie Detectors UK. Although it is no longer in use, it proudly stands in our office as a fascinating relic of technological history. It gives visitors a unique insight into the evolution of polygraph technology, showcasing the journey from rudimentary analog machines to the sophisticated systems we depend on today.

Advancements in research and validated techniques have brought significant changes to the polygraph industry, making it more reliable and effective than ever before. Today, single-issue lie detector test results achieve an impressive accuracy rate of 92% to 95%, thanks to ongoing improvements in both technology and methodology. This enhanced reliability has led to widespread adoption of polygraph testing by governments and law enforcement agencies around the world. In the UK, for example, there are now more government-employed polygraph examiners than private ones, reflecting the growing trust in the technology. The UK Sex Offender Polygraph Program, in particular, has been remarkably successful, leading to over 170 sex offenders on probation being sent back to prison after failing polygraph tests or disclosing critical information during the process.
Modern polygraph machines are built with advanced features to ensure precision and usability. There are four primary brands of polygraph machines: Stoelting, Limestone, Lafayette, and Axciton. Each brand offers unique strengths and capabilities, but all are designed to perform the same crucial function—measuring physiological responses to determine truthfulness. At Lie Detectors UK, we use the Stoelting CPS Pro polygraph, a state-of-the-art system that ensures unparalleled accuracy with the latest innovations in polygraph technology. While computerized polygraphs are not mandatory in every jurisdiction, they have become a hallmark of modern standards in the industry. All qualified UK examiners, including those at Lie Detectors UK, rely exclusively on these advanced machines, which allow for precise data collection and analysis.
At Lie Detectors UK, we are proud to have three fully qualified examiners on our team, each with extensive experience and a commitment to professionalism. Our examiners are members of the APA (American Polygraph Association) and BPA (British Polygraph Association), ensuring adherence to the highest industry standards. We operate nationwide and provide tests at dedicated offices for £399. Our services are discreet, professional, and tailored to the needs of each client, whether for personal matters, legal disputes, or professional investigations.
If you’re seeking reliable and accurate polygraph services, you’re in the right place. Contact one of our expert examiners today on 0207 859 4960 to discuss your specific case, get answers to your questions, or schedule a consultation. Alternatively, you can book a test online here. Lie Detectors UK is here to help, combining cutting-edge technology with expert knowledge to ensure every test is conducted with precision and care.