Technical Surveillance Countermeasures (TSCM) have an essential role in maintaining security and confidentiality in today's technologically advanced world. Research Electronics International (REI), an American company established in 1983, specializes in the design and manufacturing of professional electronic equipment for counter-surveillance and security purposes. REI's products are trusted worldwide by a diverse clientele, including government institutions, law enforcement organizations, corporate security specialists, and Technical Surveillance Countermeasures (TSCM) professionals.

With over three decades of in-house manufacturing experience, REI's team of experts ensures meticulous design, manufacturing, and testing of each product, ensuring the highest quality.

Each device offers unique features tailored to meet various needs, from handheld portability in RF detection with the MESA 2.0 and ANDRE, to in-depth signal analysis with OSCOR Blue and Green, or the detection of powered off or passive devices with ORION NLJDs. 

Additionally, REI operates the largest commercial TSCM training facility globally, offering courses that train individuals in both basic and advanced counter-surveillance techniques​. 

For an overview of all products, check out our REI Product Portfolio Page.