The REI OSCOR Green Spectrum Analyzer is a portable, advanced counter-surveillance device designed to detect, analyze, and identify unauthorized transmissions across a broad frequency range. Developed by Research Electronics International (REI), it is widely trusted by government agencies, security firms, and corporate security teams worldwide.
As a core tool in Technical Surveillance Counter Measures (TSCM), the OSCOR Green provides professionals with rapid, accurate, and user-friendly spectrum analysis to protect sensitive environments from covert surveillance threats.

Below is a general specification outline for the OSCOR Green spectrum analyzer:
| Specification | OSCOR Green |
|---|---|
| Frequency Range | 10 kHz – 24 GHz |
| Resolution Bandwidth | Down to 12.2 kHz |
| Sweep Time | Fast wideband sweep under 1 second |
| Display | 10.4” color touchscreen |
| Weight | Approx. 8.5 lbs (3.9 kg) |
| Battery Life | Up to 3.5 hours (field replaceable) |
While both models share REI’s high standards in TSCM equipment, there are some key differences between the OSCOR Green and the more advanced OSCOR Blue.
| Feature | OSCOR Green | OSCOR Blue |
|---|---|---|
| Frequency Range | 10 kHz – 24 GHz | 10 kHz – 24 GHz (with faster processing) |
| Processing Speed | High | Very High (Next-gen) |
| User Interface | Touchscreen with intuitive menus | Enhanced touchscreen with improved navigation |
| Weight | ~8.5 lbs | Slightly lighter |
| Best For | Standard TSCM operations | Advanced professionals requiring faster sweeps |
The OSCOR Green is best suited for:
Its main function is to detect and analyze potential surveillance signals in order to secure environments from espionage threats.
The OSCOR Blue offers faster processing and improved usability, while the OSCOR Green remains a reliable choice for standard TSCM operations.
Yes, it is designed with portability in mind, weighing only about 8.5 lbs, making it easy for professionals to carry in the field.
Government agencies, law enforcement, corporate security teams, and private counter-surveillance professionals use OSCOR Green worldwide.
The REI OSCOR Green Spectrum Analyzer remains a trusted tool for counter-surveillance professionals. Its wide frequency coverage, portability, and reliable performance make it suitable for most TSCM operations. For organizations requiring cutting-edge speed and advanced analysis, the OSCOR Blue may be a better choice, but the OSCOR Green continues to be a solid and effective investment.