Rudolph J. Liedtke pioneered Bioelectric Impedance Analysis (BIA) technology for modern body composition assessment, and founded RJL Systems in 1979. Almost 35 years later, RJL Systems remains at the forefront of BIA development, engineering and customized applications. The engineering and design team at RJL continues to set the standards for the reliability and use of whole body measurements to assess total body water and body composition. Constantly conducting research and updating our BIA software and devices, RJL offers you the most advanced, safe, reliable and accurate data available. This vigilant adherence to scientific and ethical standards has paid off: RJL’s FDA-approved BIA instruments are recognized as the global standard, with more than 15,000 units in use by practitioners and researchers in outpatient, inpatient, hospital and university settings worldwide. Mr. Liedtke is widely regarded as the foremost expert in BIA system development, customization, and application.

The RJL Quantum BIA series for body composition assessment is approved by the FDA as a Class II Medical Device, and has been cited in over 1600 research studies, papers and peer reviewed articles around the globe. Publications featuring studies using RJL technologies include The American Academy of Nurse Practitioners, Journal of Applied Physiology, American Journal of Clinical Nutrition, Journal of Health Promotion, Journal of Parenteral and Enteral Nutrition, Journal of Exercise Physiology, and the Journal of Renal Nutrition.

While other companies strive to provide bioelectrical impedance assessment, RJL Systems continues to be the bioelectrical impedance assessment technology innovator. The RJL Systems engineering team – still led by Liedtke – continues to explore exciting new medical application and research frontiers.

Client Base:

Today, RJL Systems ‘ technological advances are the benchmark, or “gold-standard”, of the BIA instrument industry. The company’s BIA Analyzers are the instruments of choice for scientists, researchers, clinicians, physicians and other medical professionals, whether they are in health care practices/institutions, educational, or government settings.

RJL Core Values:

Mission Statement: RJL Systems will build upon our history of excellence and innovation to provide the most reliable devices of the highest quality to our customers in medicine, industry, research, and government worldwide.

Vision Statement: RJL Systems will be the most trusted and valued name in Bioelectrical Impedance Analysis(BIA) and serve as the industry standard.

Quality Policy: RJL Systems is committed to providing the highest quality products and services that meet or exceed customers’ expectations and requirements through the continuous improvement of our processes.

Privacy Statement: RJL Systems assures you that any personal information that is collected will be held in strict confidence, and will be used only for the following purposes:

  • To respond to / ask for feedback on our products.
  • To inform you of new products / events via our low-volume email newsletter (1-2 E-Mails per month) and / or by postal mail.

Your contact information will never be sold or given to any person or company outside of RJL Systems for any reason, without your previous explicit consent.

RJL Company Highlights:

1979 Founded and Incorporated

1983 Received first ever FDA clearance of a BIA device for determining body composition.

1994 Participation in the NIH Technology Assessment of BIA.

2000 Release of the Quantum-II & Quantum-X. 6,000th unit shipped.

2004 Release of the Quantum Desktop. 10,000th unit shipped.

2006 Release of the Quantum-III.

2007 ISO-13485 Certification process initiated.

2008 ISO-9001 and ISO-13485 Certifications received.

2013 Release of the RJL Systems BC software iPad App.